Mercury 850 (6 CYL.) (1460999 THRU 1766823) Parts & Diagrams

🔎 Mercury 850 (6 CYL.) Reference Library — Exploded parts diagrams (22 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 850 (6 CYL.) is a 85 HP 4-stroke outboard motor. Suited for bay boats, pontoons, and center-console fishing boats requiring reliable mid-range power.

Quick Reference Specifications

Specification	Value
Engine Type	4-Stroke
Horsepower	85 HP
Displacement	—
Bore x Stroke	—
Spark Plug (Type & Gap)	—
Engine Oil Capacity	—
Recommended Engine Oil	SAE 10W-30 4-Stroke Marine Oil
Gear Case Oil Capacity	—
Idle Speed (in gear)	—
Full Throttle RPM Range	—
Fuel	Unleaded Gasoline, 87 Octane min.

Always verify specifications against your owner's manual for your specific serial number range.

Common Issues & Recommended Parts

Below are common maintenance scenarios for the Mercury 850 (6 CYL.):

Water Pump / Overheating: If the tell-tale stream is weak or absent, the water pump impeller likely needs replacement. Inspect annually or every 100 hours. → Recommended: Water Pump Impeller Kit
Engine Oil / Maintenance Light: 4-stroke engines require regular oil and filter changes. Use marine-grade oil rated for your engine. Change every 100 hours or annually. → Recommended: Oil Filter, Engine Oil
Fuel Injector Issues (EFI models): Rough idle or misfires may indicate clogged fuel injectors. Use fuel stabilizer and clean injectors periodically. → Recommended: Fuel Injector, Fuel Filter
Gear Case Oil Leak: Check lower unit seals if gear oil appears milky (water contamination). Replace seals and gaskets during lower unit service. → Recommended: Lower Unit Seal Kit, Drain Plug Gaskets
Anode Corrosion: Inspect sacrificial anodes regularly, especially in saltwater. Replace when 50% depleted to protect against galvanic corrosion. → Recommended: Zinc/Aluminum Anode Kit

Parts Diagrams & OEM Part Numbers

Expand the sections below to view detailed exploded parts diagrams and find the exact OEM replacement components for your Mercury 850 (6 CYL.).

▶BOTTOM COWL ASSEMBLY (42 parts)

Ref	OEM Part #	Part Name
1	186-1781A2	BOTTOM COWL ASSEMBLY
2	19-824928001	PLUG, HOLE-HOLE-BOTTOM COWL BLACK
3	29997A1	TRIM MOULDING ASSEMBLY
4	29998	SPLICER, TRIM MOULDING-REAR
5	10-29226	SCREW, DECORATIVE-MOULDING TO BOTTOM COWL
6	12-24671	WASHER, FIBER-MOULDING FASTENING SCREW
7	11-29225	NUT, NYLON CAP-MOULDING FASTENING SCREW
8	13-26995	LOCKWASHER, MOULDING FASTENING SCREW
9	11-26419	NUT, BRASS-MOULDING FASTENING SCREW
10	30005	BAFFLE, BOTTOM COWL
11	10-21106	SCREW, BAFFLE TO BOTTOM COWL
12	30768	BRACKET, RECTIFIER MOUNTING
13	10-21091	SCREW, BRACKET TO BOTTOM COWL (1 1/8")
14	10-56500	SCREW, BRACKET TO BOTTOM COWL (1 1/4")
15	11-8M0207775	NUT, RECTIFIER BRACKET MOUNTING SCREW
16	30003	BRACKET, PIVOT PIN TO BOTTOM COWL
17	17-30004	PIN, PIVOT-BOTTOM COWL
18	11-20696	NUT, PIVOT PIN FASTENING
19	27-29914	GASKET, POWERHEAD TO BOTTOM COWL
20	10-76621	SCREW, BOTTOM COWL TO DRIVE SHAFT HOUSING
21	20557	BRACKET, CABLE END ANCHOR
22	10-29200	SCREW, ANCHOR BRACKET TO BOTTOM COWL
23	29532	LEVER, THROTTLE CONTROL
24	30612	LEVER, SHIFT CONTROL
25	23-29529	BUSHING, THROTTLE AND SHIFT LEVER
26	10-47273	SCREW, THROTTLE AND SHIFT LEVER FASTENING
27	12-8M0042641	WASHER, THROTTLE AND SHIFT LEVER FASTENING SCREW
28	17-30978A1	PIN ASSEMBLY, CLEVIS YOKE
29	17-239281	ROLL PIN, CLEVIS YOKE PIN
30	10-20584	SCREW, CLEVIS PIN FASTENING
31	13-29402	WASHER, WAVE-PIN FASTENING SCREW
32	11-8M0204718	NUT, PIN FASTENING SCREW
33	30789A1	SHIFT SHAFT ASSEMBLY, UPPER
34	27714	ROD (SLEEVE), SHIFT CONTROL END
35	11-25168	NUT, SHIFT SHAFT END ADJUSTING
36	30630	ROD, LINK-SHIFT SHAFT END
37	18-210711	COTTER PIN, LINK ROD TO SHIFT SHAFT
38	12-20583	WASHER, LINK ROD
39	24-30621	SPRING, DETENT
40	10-98256	SCREW,DETENT SPRING TO BOTTOM COWL
41	12-69057	WASHER, DETENT SPRING SCREW
42	11-8M0207775	NUT, DETENT SPRING SCREW

▶CARBURETOR ASSEMBLY (37 parts)

Ref	OEM Part #	Part Name
1	1335-2081	CARBURETOR ASSEMBLY, COMPLETE (KC-3A)
2	1395-8673	FLOAT ASSEMBLY
3	17-20853	PIN FLOAT LEVER PINION
4	1399-102	LEVER, FLOAT (LOWER)
5	1399-101	LEVER, FLOAT (UPPER)
6	1395-92581	INLET NEEDLE, SEAT AND GASKET
7	27-25033	GASKET, INLET SEAT
8	1395-6027	SCREW, THROTTLE STOP LEVER
9	8146791	LEVER, THROTTLE STOP (SEE NOTE)
10	1399-2012	SHAFT, THROTTLE
11	24-20869	SPRING, THROTTLE SHAFT RETURN (UPPER CARBURETOR)
12	1399-1651	JET, MAIN FUEL (.051)
13	27-28409	GASKET, MAIN FUEL JET
14	24-27160	SPRING, IDLE ADJUSTMENT SCREW
15	1399-1713	SCREW, IDLE ADJUSTMENT
16	1399-99	GASKSET, FLOAT BOWL COVER
17	1399-1133	COVER, FLOAT BOWL
18	1399-3938	SCREEN, FILTER
19	10-22625	SCREW, FLOAT BOWL COVER (SHORT)
20	10-25850	SCREW, FLOAT BOWL COVER (LONG)
21	27-25851	GASKET, STRAINER COVER (LARGE)
22	27-25849	GASKET, STRAINER COVER (SMALL)
23	1399-4791A1	COVER, STRAINER
24	27-25848	GASKET, STRAINER COVER SCREW
25	10-25822	SCREW, STRAINER COVER FASTENING
26	1399-2179	NOZZLE, MAIN
27	10-28846	SCREW,PLUG-MAIN NOZZLE
28	10-23035	SCREW AND LOCKWASHER, THROTTLE SHUTTER
29	1399-2014	SHUTTER, THROTTLE
30	1399-2009	TUBE, IDLE
31	27-23180	GASKET, IDLE TUBE
32	10-28845	SCREW, PLUG-BODY CHANNEL
33	19-32299	WELCH PLUG, BODY CHANNEL
34	10-28405	SCREW PLUG, MAIN FUEL JET CHANNEL
35	1399-2182	REPAIR PARTS KIT (1 PER CARBURETOR)
36	27-31402	GASKET,CARBURETOR FLANGE
37	11-29250	NUT, CARBURETOR MOUNTING STUD

▶CARBURETOR LINKAGE AND CHOKE SOLENOID (40 parts)

Ref	OEM Part #	Part Name
1	29690	CHOKE SOLENOID, TOP COWL
2	30050	TERMINAL, CHOKE SOLENOID LEAD
3	10-24773	SCREW, CHOKE SOLENOID TO TOP COWL
4	13-26991	LOCKWASHER, CHOKE SOLENOID SCREW
5	10-20540	SCREW, CHOKE SOLENOID TO TOP COWL
6	13-26992	LOCKWASHER, CHOKE SOLENOID SCREW
7	397-421A2	GROUND STRAP ASSEMBLY, CHOKE SOLENOID TO ADAPTOR
8	54-648552	CLIP, CHOKE SOLENOID WIRE
9	10-24239	SCREW, WIRE CLIP TO TOP COWL
10	8M0084613	"D" WASHER,, WIRE CLIP FASTENING SCREW
11	54-22783	"S" CLIP, CHOKE SOLENOID WIRE TO TOP COWL
12	90242A1	KNOB, CHOKE ROD
13	25-20116	GROMMET, CHOKE ROD
14	22462	"U" LINK, CHOKE KNOB TO CHOKE ROD
15	10-69022	SCREW, "U" LINK TO CHOKE KNOB
16	13-26996	LOCKWASHER,"U" LINK SCREW
17	18-26953	COTTER PIN, "U" LINK TO CHOKE ROD
18	48315A4	PLUNGER AND LINK ASSEMBLY, CHOKE SOLENOID
19	12-30164	WASHER, PLUNGER AND LINK
20	18-26953	COTTER PIN, LINK TO UPPER CHOKE LEVER
21	27977	CLUSTER, THROTTLE LEVER (UPPER CARBURETOR)
22	1395-6027	SCREW, CLUSTER TO THROTTLE LEVER
23	1335-2081	CARBURETOR ASSEMBLY, COMPLETE
24	53649A2	THROTTLE PICKUP BRACKET ASSEMBLY
25	10-29239	SCREW, THROTTLE BRACKET MOUNTING
26	12-30164	WASHER, CLAMP FASTENING SCREW
27	26977	BRACKET, COIL LEAD RETAINER
28	10-98253	SCREW, RETAINER BRACKET TO CENTER CARBURETOR
29	13-21272	LOCKWASHER, BRACKET FASTENING SCREW
30	32043	ROD, CHOKE
31	16-30172	STUD, CARBURETOR-CHOKE SHUTTER PIVOT
32	47804	SHUTTER, CHOKE-CARBURETOR
33	23-30438	BUSHING,NYLON-UPPER CHOKE SHUTTER
34	17-25391	RIVET, CHOKE SHUTTER TO CHOKE ROD
35	12-30164	WASHER, CHOKE SHUTTER CARBURETOR STUD
36	11-20110	NUT, CHOKE SHUTTER TO CARBURETOR STUD
37	10-28713	SCREW, RETAINER TO LOWER CARBURETOR
38	10-657461	STUD, CHOKE ROD SPRING TO CARBURETOR
39	23-32427	SPACER, CHOKE ROD SPRING STUD
40	11-8M0207775	NUT, CHOKE ROD SPRING TO CARBURETOR STUD

▶CLAMP AND SWIVEL BRACKET ASSEMBLY (55 parts)

Ref	OEM Part #	Part Name
1	1440-3296A1	CLAMP BRACKET ASSEMBLY
2	28403A3	THUMB SCREW ASSEMBLY
3	12-28404	WASHER, THUMB SCREW
4	8M0041936	TUBE, TILT-CLAMP BRACKET TO SWIVEL BRACKET
5	12-52864	SHIM, CLAMP BRACKET TILT TUBE (.010-.020)
6	11-858869	NUT, TILT TUBE FASTENING
7	53078	CAP, PLASTIC-TILT TUBE
8	23-59624	SPACER, CLAMP BRACKET STUD
9	16-59625	STUD, CLAMP BRACKET
10	13-8M0204647	LOCKWASHER, CLAMP BRACKET STUD
11	11-22053	NUT, CLAMP BRACKET STUD
12	17-8M0026068	TILT LOCK PIN ASSEMBLY
13	32-28052	SLEEVE, RUBBER-TILT LOCK PIN BUMPER
14	1453-2688A1	SWIVEL BRACKET ASSEMBLY
15	22-69059	FITTING, GREASE
16	26-31783	OIL SEAL
17	24-94891	SPRING, COIL -SWIVEL BRACKET
18	17-28658	PIN, COIL SPRING MOUNTING
19	19-77633Q	LUBRICAP, SWIVEL BRACKET GREASE FITTING
20	23-28688	SPACER, RUBBER-COIL SPRING POSITIONING
21	17-25598	PIN, REVERSE LOCK SPRING ATTACHING
22	17-31772A1	SWIVEL PIN AND TOP YOKE ASSEMBLY
23	28203	BUMPER, TOP YOKE
24	10-49554	BOLT, TOP YOKE TO UPPER MOUNT
25	11-8M0204653	NUT, TOP YOKE BOLT FASTENING
26	12-31815	WASHER, SWIVEL PIN-LOWER (TOP WASHER OPTIONAL)
27	31234	BOOT, RUBBER-UPPER SHIFT SHAFT
28	38-56267	SERIAL PLATE
29	10-25612	SCREW, DRIVE-SERIAL PLATE TO SWIVEL BRACKET
30	28205T	STRAP STOP, DRIVE SHAFT HOUSING TO SWIVEL BRACKET
31	10-28200	SCREW, STRAP STOP TO DRIVE SHAFT HOUSING
32	11-25269	NUT, STRAP STOP FASTENING SCREW
33	31775	YOKE, BOTTOM
34	11-71956	NUT, SWIVEL PIN RETAINING
35	24-29821	SPRING, REVERSE LOCK TENSION
36	26903A4	REVERSE LOCK ASSEMBLY
37	56349	SHAFT, REVERSE LOCK PIVOT
38	18-45882	COTTER PIN, REVERSE LOCK TO SHAFT
39	30126A1	TILT STOP LEVER ASSEMBLY
40	10-30128	SCREW, TILT STOP LEVER ANCHOR
41	13-31030	WASHER, WAVE-LEVER ANCHOR SCREW
42	11-29250	NUT, LEVER ANCHOR SCREW
43	55-28416	PIN, UPPER SHOCK MOUNTING
44	23-28199	SPACER, UPPER SHOCK BUSHING TO CLAMP BRACKET
45	12-28196	WASHER, UPPER BUSHING RETAINER (INNER)
46	12-8M0204648	WASHER, UPPER AND LOWER BUSHING RETAINER (OUTER)
47	10-28450	SCREW, NYLOCK-UPPER AND LOWER SHOCK MOUNTING PIN
48	55-58780A7	SHOCK ABSORBER
49	23-28198	BUSHING, RUBBER-SHOCK ABSORBER (LOWER)
50	23-32171	BUSHING, RUBBER-SHOCK ABSORBER (UPPER)
51	55-696531	PIN, LOWER SHOCK MOUNTING
52	12-8M0204695	WASHER, LOWER BUSHING RETAINER (INNER)
53	10-68298	BOLT, CLAMP BRACKET TO BOAT TRANSOM
54	12-68410	WASHER, CLAMP BRACKET BOLT
55	11-82670912	NUT, CLAMP BRACKET BOLT

▶COWLING AND FRONT COVER (ENGINES, SERIAL #162019 AND BELOW) (22 parts)

Ref	OEM Part #	Part Name
1	184-2043A3	COWL FRONT COVER ASSEMBLY
2	26183A5	EMBLEM, FRONT COVER
3	10-29226	SCREW, BRACKET TO FRONT COVER
4	13-26995	LOCKWASHER, BRACKET FASTENING SCREW
5	11-26419	NUT BRACKET FASTENING SCREW
6	29345	BUMPER, RUBBER-FRONT COVER BRACKET
7	56849	KNOB, COWL FRONT COVER FASTENING
8	12-30771	WASHER, COVER FASTENING KNOB (RUBBER)
9	12-26825	WASHER, COVER FASTENING KNOB (STEEL)
10	24-30772	SPRING, TENSION-FASTENING KNOB
11	17-29077	ROLL PIN, TENSION SPRING TO KNOB
12	31089	STRIP, SOUND ABSORBING
13	2120-2509A5	WRAP AROUND COWL ASSEMBLY
14	46785A1	HANDLE, COWL LATCH
15	53-21058	"E" RING, COWL LATCH HINGE PIN
16	17-21057	PIN, HINGE-COWL LATCH HANDLE
17	46785A1	SWIVEL, COWL LATCH
18	30413	HOOK, COWL LATCH FASTENING
19	30021	BLANKET, SOUND ABSORBING-SRAP AROUND COWL
20	37-33679	DECAL, WRAP AROUND COWL-PORT
21	92-271091	ADHESIVE COMPOUND ( 3 1/2 OUNCE KIT) EMBLEM FASTENING
22	37-31883	DECAL, WRAP AROUND COWL-REAR

▶COWLING AND FRONT COVER (ENGINES, SERIAL #164888 AND BELOW) (23 parts)

Ref	OEM Part #	Part Name
1	2113-2663A7	COWL FRONT COVER ASSEMBLY
2	37-35832	DECAL, FRONT COVER-"MERC 850"
3	37-35831	DECAL, FRONT COVER-"BLIPS"
4	37-35833	DECAL,FRONT COVER EMBLEM
5	37-64413	EMBLEM, FRONT COVER
6	37-35780	DECAL, FRONT COVER - "FLAGS"
7	56849	KNOB, COWL FRONT COVER FASTENING
8	12-30771	WASHER, COVER FASTENING KNOB (RUBBER)
9	12-26825	WASHER, COVER FASTENING KNOB (STEEL)
10	24-30772	SPRING, TENSION-FASTENING KNOB
11	17-29077	ROLL PIN, TENSION SPRING TO KNOB
12	31089	STRIP, SOUND ABSORBING
13	38675	BLANKET, SOUND ABSORBING
14	35769	SEAL, SOUND ABSORBING-UPPER
15	2120-2509A5	WRAP AROUND COWL ASSEMBLY
16	46785A1	HANDLE, COWL LATCH
17	53-21058	"E" RING, HANDLE TO HINGE PIN
18	17-21057	PIN, HINGE-COWL LATCH HANDLE
19	46785A1	SWIVEL, COWL LATCH
20	30413	HOOK, COWL LATCH FASTENING
21	30021	BLANKET, SOUND ABSORBING
22	37-35747	DECAL, WRAP AROUND COWL-PORT
23	92-271091	ADHESIVE COMPOUND, EMBLEM FASTENTING

▶CRANKSHAFT, PISTONS AND CONNECTING RODS (MERC 850E) (27 parts)

Ref	OEM Part #	Part Name
1	417-1787	CRANKSHAFT
2	28-45554	KEY,FLYWHEEL DRIVE
3	521-1490A1	CENTER MAIN BEARING ASSEMBLY
4	17-20032	DOWEL PIN, CENTER MAIN BEARING
5	29-714221	BEARING, NEEDLE-OUTER RACE
6	26113T	RACE, OUTER (PAIR)
7	53-26933	RING, SNAP-OUTER RACE
8	17-27732	DOWEL PIN, STEPPED
9	10-22968	SCREW, CENTER MAIN BEARING CLAMPING
10	11-8M0207775	NUT, CENTER MAIN BEARING CLAMPING SCREW
11	527-1932A2	MAIN BEARING ASSEMBLY, VALVE TYPE
12	17-20032	DOWEL PIN, MAIN BEARING
13	10-25313	SCREW, MAIN BEARING CLAMPING
14	11-29469	NUT, MAIN BEARING CLAMPING SCREW
15	34-88498A1	REED SET, MATCHED-MAIN BEARING
16	34-20053	REED, STOP, MAIN BEARING REED VALVES
17	11-29469	NUT, REED STOP MOUNTING SCREW
18	10-77280	SCREW, REED STOP MOUNTING
19	729-1948A2	PISTON AND PISTON PIN ASSEMBLY
20	40-30002	LOCK RING, PISTON PIN
21	39-30587A12	RING, PISTON (3/32") THICK)
22	611-1747A3	CONNECTING ROD AND CAP ASSEMBLY
23	10-45379	SCREW, CONNECTING ROD
24	11-20061	NUT, CONNECTING ROD SCREW
25	29-47897	BEARING, NEEDLE-CRANKPIN
26	29-39656	BEARING, NEEDLE-PISTON PIN
27	39-30704A12	RING, PISTON (.015 OVERSIZE) 3/32" THICK

▶CRANKSHAFT, PISTONS AND CONNECTING RODS (MERC 850E-1) (27 parts)

Ref	OEM Part #	Part Name
1	420-3351A3	CRANKSHAFT
2	28-45554	KEY, FLYWHEEL DRIVE
3	531-1884A3	CENTER MAIN BEARING ASSEMBLY
4	17-20032	DOWEL PIN, CENTER MAIN BEARING
5	29-714221	BEARING, NEEDLE-OUTER RACE
6	26113T	RACE, OUTER (PAIR)
7	53-26933	RING, SNAP-OUTER RACE
8	17-31245	DOWEL PIN, STEPPED
9	10-22968	SCREW, CENTER MAIN BEARING CLAMPING
10	11-8M0207775	NUT, CENTER MAIN BEARING CLAMPING SCREW
11	533-2761A3	MAIN BEARING ASSEMBLY, VALVE TYPE
12	17-20032	DOWEL PIN, MAIN BEARING
13	10-25313	SCREW, MAIN BEARING CLAMPING
14	11-29469	NUT, MAIN BEARING CLAMPING SCREW
15	34-88498A1	REED SET, MATCHED-MAIN BEARING
16	34-20053	REED STOP, MAIN BEARING REED VALVES
17	11-29469	NUT, REED STOP MOUNTING SCREW
18	10-77280	SCREW, REED STOP MOUNTING
19	732-2735A2	PISTON AND PISTON PIN ASSEMBLY
20	40-32118	LOCK RING, PISTON PIN
21	39-32921A12	RING, PISTON (5/64" THICK)
22	611-1885A4	CONNECTING ROD AND CAP ASSEMBLY
23	10-45379	SCREW, CONNECTING ROD
24	11-20061	NUT, CONNECTING ROD SCREW
25	29-47897	BEARING NEEDLE-CRANKPIN
26	29-39656	BEARING, NEEDLE-PISTON PIN
27	39-33945A12	RING, PISTON (.15 OVERSIZE)-5/64" THICK

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (MERC 850E) (57 parts)

Ref	OEM Part #	Part Name
1	1125-1675A1	END CAP ASSEMBLY, UPPER
2	26-41953	OIL SEAL
3	25-20081	"O" RING
4	30-63742T	BEARING, BALL
5	15-20082A1	SHIM, END CAP TO CRANKCASE (.002-3-510)
6	10-30225	SCREW, END CAP MOUNTING
7	833-1919A2	CYLINDER BLOCK AND CRANKCASE ASSEMBLY
8	23-26348	BUSHING, CRANKCASE - COWL MOUNTING STUD
9	22-328022	PLUG, PIPE-WATER PRESSURE HOLE
10	16-21831	STUD, CARBURETOR MOUNTING
11	16-64281	STUD, CRANKCASE TO DRIVE SHAFT HOUSING
12	17-43044	PIN, DOWEL-CRANKCASE TO CYLINDER BLOCK
13	17-20032	PIN,DOWEL-CYLINDER BLOCK TO MAIN BEARING
14	16-26134	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING
15	16-26135	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING
16	10-26132	SCREW, CRANKCASE TO CYLINDER BLOCK (2 1/2")
17	10-78841	SCREW, CRANKCASE TO CYLINDER BLOCK (1 1/2")
18	11-29250	NUT, CRANKCASE FASTENING SCREW
19	53-78201	BRACKET, CLAMP EXTENSION
20	10-98260	SCREW, MAIN BEARING LOCKING
21	10-20359	SCREW,CENTER MAIN BEARING LOCKING
22	14-20091	TAB WASHER, BEARING LOCKING SCREW
23	1126-1751A1	END CAP ASSEMBLY,LOWER
24	21-28481A1	CHECK VALVE ASSEMBLY,END CAP
25	26-41953	OIL SEAL, UPPER
26	26-29478	OIL SEAL, LOWER
27	25-20081	"O" RING
28	30-63742T	BEARING, BALL
29	15-20085A1	SHIM, END CAP TO CRANKCASE (.002-3-5-10)
30	10-30225	SCREW,END CAP MOUNTING
31	27-30013	GASKET, CYLINDER BLOCK TO MANIFOLD PLATE
32	30066	PLATE,EXHAUST MANIFOLD
33	27-30012	GASKET, MANIFOLD PLATE TO COVER
34	31303	COVER, EXHAUST MANIFOLD
35	10-28667	SCREW, ,MANIFOLD COVER MOUNTING
36	54-26519	CLAMP, SPARK PLUG LEADS TO COVER
37	30109	GROUND STRAP ASSEMBLY, CYLINDER BLOCK TO BOTTOM COWL
38	58124A1	SWTITCH, MERCURY (N.L.A.-ORDER 33385A1 MERCURY SWITCH AND (1
39	54-22875	CLAMP, MERCURY SWITCH HOLDING
40	8M0084613	"D" WASHER, CLAMP FASTENING SCREW
41	10-20401	SCREW, MERCURY SWITCH CLAMP TO EXHAUST COVER
42	27-29866	GASKET, TRANSFER PORT COVER
43	29886	COVER, TRANSFER PORT
44	10-24770	SCREW, TRANSFER PORT COVER AND SNUBBER MOUNTING (1 3/8" )
45	13-26992	LOCKWASHER, TRANSFER PORT COVER AND SNUBBER MOUNTING SCREW
46	27-31798	GASKET, CYLINDER BLOCK COVER
47	1011-1946A1	CYLINDER BLOCK COVER ASSEMBLY
48	23-26348	BUSHING COVER-COWL MOUNTING STUD
49	10-20653	SCREW, CYLINDER BLOCK COVER MOUNTING (1")
50	11-8M0207775	NUT, COVER MOUNTING SCREW
51	22-67902	CONNECTOR, CYLINDER BLEED HOSE-LOWER AND CENTER
52	32-9912688	HOSE,UPPER AND LOWER CYLINDER BLEED
53	22-25956	TEE, CHECK VALVE AND ADAPTOR
54	22-28586A1	ADAPTOR AND CHECK VALVE ASSEMBLY
55	21-28481A1	CHECK VALVE ASSEMBLY
56	22-62365A1	CHECK VALVE ASSEMBLY,UPPER-BLEED HOSE
57	54-20387	CLAMP,BLEED HOSE TO CENNECTOR

▶CYLINDER BLOCK AND CRANKCASE ASSEMBLY (MERC 850E-1) (61 parts)

Ref	OEM Part #	Part Name
1	1128-1890A1	END CAP ASSEMBLY, UPPER
2	26-41953	OIL SEAL
3	25-31305	"O" RING
4	30-62567T	BEARING, BALL
5	15-31283A1	SHIM, END CAP TO CRANKCASE (.002-3-5-10)
6	10-30225	SCREW, END CAP MOUNTING
7	836-1852A1	CYLINDER BLOCK AND CRANKCASE ASSEMBLY
8	23-26348	BUSHING, CRANKCASE-COWL MOUNTING STUD
9	22-328022	PLUG, PIPE-WATER PRESSURE HOLE
10	16-21831	STUD, CARBURETOR MOUNTING
11	16-64281	STUD, CRANKCASE TO DRIVE SHAFT HOUSING
12	17-43044	PIN, DOWEL-CRANKCASE TO CYLINDER BLOCK
13	17-20032	PIN, DOWEL-CYLINDER BLOCK TO MAIN BEARING
14	16-26134	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING
15	16-26135	STUD, CYLINDER BLOCK TO DRIVE SHAFT HOUSING
16	10-26132	SCREW, CRANKCASE TO CYLINDER BLOCK F(2 1/2")
17	10-78841	SCREW, CRANKCASE TO CYLINDER BLOCK F(F1 1/2")
18	11-29250	NUT, CRANKCASE FASTENING SCREW
19	53-78201	BRACKET, CLAMP EXTENSION
20	10-36351	SCREW, MAIN BEARING LOCKING
21	10-20359	SCREW, CENTER MAIN BEARING LOCKING
22	14-20091	TAB WASHER,BEARING LOCKING SCREW
23	1126-1751A1	END CAP ASSEMBLY, LOWER
24	21-28481A1	CHECK VALVE ASSEMBLY, END CAP
25	26-41953	OIL SEAL UPPER
26	26-29478	OIL SEAL, LOWER
27	25-20081	"O" RING
28	30-63742T	BEARING BALL
29	15-20085A1	SHIM, END CAP TO CRANKCASE(.002-3-5-10)
30	10-30225	SCREW, END CAP MOUNTING
31	27-31302	GASKET, CYLINDER BLOCK TO MANIFOLD PLATE
32	30011	PLATE EXHAUST MANIFOLD
33	10-20540	SCREW, TRANSFER PORT COVER MOUNTING (5/8")
34	31303	COVER, EXHAUST MANIFOLD
35	10-28668	SCREW, MANIFOLD COVER MOUNTING
36	54-26519	CLAMP, SPARK PLUG LEADS TO COVER
37	30109	GROUND STRAP ASSEMBLY, CYLINDER BLOCK TO BOTTOM COWL
38	32-8M0108355	TUBE, BALANCE-MAIN BEARING
39	22-20781	ELBOW, BALANCE TUBE TO MAIN BEARING SCREW
40	22-8585531	TEE, BALANCE TUBE TO MAIN BEARING SCREW
41	54-20386	CLAMP, BALANCE TUBE TO ELBOW AND TEE
42	58124A1	SWITCH,MERCURY (M.L.A.-ORDER 33385A)MERCURY SWITCH AND (1)10
43	54-22875	CLAMP, MERCURY SWITCH HOLDING
44	8M0084613	"D" WASHER, CLAMP FASTENING SCREW
45	10-20401	SCREW, MERCURY SWITCH CLAMP TO EXHAUST COVER
46	22-67902	CONNECTOR, CYLINDER BLEED HOSE-LOWER AND CENTER
47	32-9912688	HOSE, UPPER AND LOWER CYLINDER BLEED
48	22-25956	TEE, CHECK VALVE AND ADAPTOR
49	22-28586A1	ADAPTOR AND CHECK VALVE ASSEMBLY
50	21-28481A1	CHECK VALVE ASSEMBLY
51	22-62365A1	CHECK VALVE ASSEMBLY, UPPER-BLEED HOSE
52	54-20387	CLAMP, BLEED HOSE TO CONNECTOR
53	27-31798	GASKET, CYLINDER BLOCK COVER
54	1011-1946A1	CYLINDER BLOCK COVER ASSEMBLY
55	23-26348	BUSHING, COVER-COWL MOUNTING STUD
56	10-56500	SCREW, CYLINDER BLOCK COVER MOUNTING (1 1/4")
57	11-8M0207775	NUT, COVER MOUNTING SCREW
58	27-31304	GASKET, TRANSFER PORT COVER
59	31288	COVER, TRANSFER PORT
60	10-28666	SCREW,TRANSFER PORT COVER AND BALLAST MOUNTING (1")
61	13-26992	LOCKWASHER, TRANSFER PORT COVER AND BALLAST MOUNTING SCREW

▶DISTRIBUTOR ADAPTOR AND PILOT ASSEMBLY (37 parts)

Ref	OEM Part #	Part Name
1	53-26406	RING, SNAP-BALL BEARING RETAINING
2	30-26379	BEARING, BALL-DRIVE SHAFT
3	45-30573	DRIVE SHAFT, DISTRIBUTOR
4	45960A1	PILOT ASSEMBLY
5	30-20066	BEARING,BALL-DISTRIBUTOR PILOT
6	24-29275	SPRING, HORSESHOE
7	17-27962	PIN,SPRING TERMINAL
8	12-8M0204649	WASHER, SPRING TERMINAL PIN
8A	32197	STOP, SPRING TERMINAL PIN
9	55804A1	ECONOMIZER COLLAR AND PIN ASSEMBLY
10	17-27961	PIN, SPRING RETAINER
11	22-25094	FITTING, GREASE-ECONOMIZER COLLAR
12	32044A1	THROTTLE ACTUATOR ASSEMBLY
13	23-26602	BUSHING, NYLON-THROTTLE ACTUATOR
14	10-69022	SCREW, THROTTLE ACTUATOR TO SECTOR GEAR
15	13-26996	LOCKWASHER, THROTTLE ACTUATOR FASTENING SCREW
16	12-847883	WASHER, THROTTLE ACTUATOR FASTENING SCREW
17	30645	ADAPTOR, DISTRIBUTOR
18	22-25094	FITTING, GREASE-ADAPTOR
19	10-78841	SCREW,ADAPTOR AND PILOT TO CRANKCASE FLANGE
20	12-20084	WASHER, ADAPTOR AND PILOT FASTENING SCREW
21	11-22053	NUT, ADAPTOR AND PILOT FASTENING SCREW
22	12-27939	WASHER, THRUST-DISTRIBUTOR PILOT
23	14-27960	TAB WASHER, CAP LOCKING
24	13-27959	WASHER,WAVE-TAB WASHER TENSION
25	27955	CAP,ADAPTOR AND PILOT FASTENING
26	10-28668	SCREW, ADAPTOR AND PILOT TO DISTRIBUTOR
27	13-26992	LOCKWASHER,ADAPTOR AND PILOT TO DISTRIBUTOR SCREW
28	23-29909	SPACER, DRIVEN PULLEY
29	29906A1	DRIVEN PULLEY ASSEMBLY
30	17-29908	PIN,DRIVEN PULLEY
31	29907	FLANGE, DRIVEN PULLEY
32	28-29910	KEY,MAGNETO DRIVING
33	10-41506	SCREW,PULLEY CLAMPING
34	13-26996	LOCKWASHER,PULLEY CLAMPING SCREW
35	20140	BELT,TIMING
36	30109	GROUND STRAP ASSEMBLY, ADAPTOR TO CRANKCASE

▶DISTRIBUTOR ASSEMBLY, COMPLETE (45 parts)

Ref	OEM Part #	Part Name
1	393-1282	HOUSING, PRIMARY
2	22-25885A1	ELBOW ASSEMBLY, VENT HOSE-PRIMARY HOUSING
3	393-1504A11	BREAKER ASSEMBLY, COMPLETE
4	16-29230	STUD, PRIMARY LEAD AND TENSION SPRING
5	11-29236	NUT, PRIMARY LEAD FASTENING
6	393-1586	GROMMET, PLASTIC-BREAKER ASSEMBLY
7	12-26439	WASHER, BREAKER PIVOT PIN
8	18-26953	COTTER PIN, BREAKER TO PIVOT PIN
9	393-1287A2	CAM WICK AND HOLDER ASESMBLY
10	10-20597	SCREW, BREAKER HOLDER TO HOUSING
11	393-1656	WIRE, PRIMARY GROUND
12	393-1283A1	CONDENSER
13	10-29434	SCREW, CONDENSER TO HOUSING
14	30-26379	BEARING, BALL-CAM SHAFT
15	17-25319	PIN, ROLL-CAM SHAFT
16	393-1779A2	SHAFT ASSEMBLY-DISTRIBUTOR CAM
17	25-26543	"O" RING, CAM SHAFT
18	23-28933	BUSHING, DISTRIBUTOR CAM SHAFT
19	13-26917	WASHER, WAVE-BALL BEARING TENSION
20	27-26412	GASKET, HOUSING TO ADAPTOR
21	393-1278	ADAPTOR, HOUSING TO DISTRIBUTOR CAP
22	10-32651	SCREW, ADAPTOR TO HOUSING
23	393-1280A1	ROTOR, DISTRIBUTOR
24	27-36268	GASKET, DISTRIBUTOR CAP TO ADAPTOR SEE NOTE BELOW
25	393-1927A9	DISTRIBUTOR CAP ASSEMBLY SEE NOTE BELOW
26	393-1293A1	BRUSH AND SPRING ASSEMBLY
27	22-31521	ELBOW, VENT HOSE-DISTRIBUTOR CAP
28	F1277	SIDE INLET ASSEMBLY
29	393-1292A1	BRUSH AND SPRING ASSEMBLY
30	27-26447	GASKET, SIDE INLET TO DISTRIBUTOR CAP
31	10-29167	SCREW, SIDE INLET TO DISTRIBUTOR CAP
32	10-29158	SCREW, DISTRIBUTOR CAP TO ADAPTOR TO HOUSING SEE NOTE BELO
33	14-29157	TAB WASHER, DISTRIBUTOR CAP FASTENING SCREWSEE NOTE BELOW
34	11-21806	NUT, DISTRIBUTOR CAP FASTENING SCREW
35	84-821945A37	HIGH TENSION CABLE ASSEMBLY (COIL#2)
36	84-821945A27	HIGH TENSION CABLE ASSEMBLY (COIL #1)
37	85-94589	SLEEVE, TERMINAL END COVER
38	8M0084600	CONNECTOR, SPARK PLUG LEAD
39	25-26547	GROMMET, HIGH TENSION CABLE
40	84-813715A1	SPARK PLUG LEAD ASSEMBLY (#3,4 AND 5) Comment: ORDER 36549 KIT FOR REPLACEMENT OF LEAD WIRE MARKERS
41	84-813715A1	SPARK PLUG LEAD ASSEMBLY (#2 AND 6) Comment: ORDER 36549 KIT FOR REPLACEMENT OF LEAD WIRE MARKERS
42	1,84-813715A1	SPARK PLUG LEAD ASSEMBLY Comment: ORDER 36549 KIT FOR REPLACEMENT OF LEAD WIRE MARKERS
43	32-30574	SLEEVE, SPARK PLUG LEAD
44	32-46768	SLEEVE, SPARK PLUG LEAD
45	85-63709A1	PROTECTOR, SPARK PLUG LEAD

▶DISTRUBUTOR VERTICAL LINKAGE AND IGNITION COILS (48 parts)

Ref	OEM Part #	Part Name
1	55805	BRACKET, STOP
2	10-24228	SCREW, STOP BRACKET ADJUSTING
3	11-20890	NUT, STOP BRACKET ADJUSTING SCREW
4	26852	CAP, NYLON-ADJUSTING SCREW
5	10-28636	SCREW, STOP BRACKET TO DISTRIBUTOR ADAPTOR
6	12-20533	WASHER, STOP BRACKET FASTENING SCREW
7	27947	SWIVEL, LINKAGE-ECONOMIZER COLLAR
8	25996A1	SWIVEL AND LINK ROD ASSEMBLY
9	27949	ROD, LINK,UPPER
10	11-25168	NUT, UPPERLINK ROD ADJUSTING
11	27948	SWIVEL, UPPER AND LOWER LINK RODS
12	30582	LEVER, LINKAGE-UPPER
13	30619	LEVER, LINKAGE-LOWER
14	30623	ROD, LINK-LOWER
15	30629	SHAFT, VERTICAL
16	23-26954	BUSHING, NYLON-VERTICAL SHAFT
17	17-25319	ROLL PIN, VERTICAL SHAFT AND LINKAGE LEVERS
18	12-8M0204649	WASHER, UPPER AND LOWER SWIVEL
19	11-8267089	NUT, UPPER AND LOWER SWIVEL TO LEVER AND BRACKET
20	10-25781	SCREW, SET-LINKAGE LEVER
21	12-20553	WASHER, VERTICAL SHAFT-CENTER
22	393-1282A17	DISTRIBUTOR ASSEMBLY, COMPLETE
23	33-31390	SPARK PLUG (AC-K421)
24	54-24836	CLIP, DISTRIBUTOR PRIMARY GROUND LEAD (1/4-6)
25	8M0084613	"D" WASHER, GOURND LEAD CLIP SCREW
26	10-8M0113176	SCREW, DISTRIBUTOR GROUND LEAD CLIP TO CRANKCASE
27	898253T24	COIL, IGNITION
28	13-20554	LOCKWASHER, IGNITION COIL TERMINALS
29	13-26996	LOCKWASHER, IGNITION COIL TERMINALS
30	11-68219	NUT, IGNITION COIL TERMINALS
31	25-26543	"O" RING, IGNITION COIL
32	28922	JUMPER, COIL TO COIL
33	26514	BRACKET, COIL FASTENING
34	26512	BAND, COIL BRACKET
34A	32229	CLAMP, COIL BRACKET
35	10-26889	SCREW, COIL BAND TO BRACKET
36	11-8M0207775	NUT, COIL BAND SCREW
37	10-20784	SCREW, COIL BRACKET TO BOTTOM COWL (1 1/2")
38	10-26889	SCREW, COIL BRACKET TO BOTTOM COWL (2 1/4")
39	11-8M0207775	NUT, COIL BRACKET SCREW
40	16-20077	STUD, COIL BRACKET TO SUPPORT
41	30238	SUPPORT, EXTERNAL WIRING HARNESS
42	12-20084	WASHER, COIL BRACKET STUD
43	11-862902	NUT,COIL BRACKET STUD
44	22-291112	CONNECTOR, DISTRIBUTOR VENT TUBE
45	32-8M0108355	HOSE,VENT-DISTRIBUTOR TO CONNECTOR (13")
46	22-996642	ELBOW,DISTRIBUTOR VENT TUBE
47	32-8M0108355	HOSE,VENT-DISTRIBUTOR TO ELBOW (16")

▶DRIVE SHAFT HOUSING ASSEMBLY (51 parts)

Ref	OEM Part #	Part Name
1	1540-2384A2	DRIVE SHAFT HOUSING ASSEMBLY Comment: SERIAL 01648888-09999999
2	16-56295	STUD, DRIVE SHAFT HOUSING TO GEAR HOUSING Comment: SERIAL 01648888-09999999
3	35638A1	COVER, TRIM-DRIVE SHAFT HOUSING Comment: SERIAL 00000000-01626019
3A	35638A1	TRIM COVER ASSEMBLY, DRIVE SHAFT HOUSING-STARTED WITH SERIAL Comment: SERIAL 01648888-09999999
4	10-30742	SCREW, TRIM COVER TO DRIVE SHAFT HOUSING Comment: SERIAL 00000000-01626019
4A	37-35393	DECAL, TRIM COVER-PORT AND STARBOARD Comment: SERIAL 01648888-09999999
5	37-31924	DECAL, "FULL GEAR SHIFT" - STARBOARD Comment: SERIAL 00000000-01626019
5A	10-30742	SCREW, TRIM COVER TO DRIVE SHAFT HOUSING Comment: SERIAL 01648888-09999999
6	37-31925	DECAL, "FULL GEAR SHIFT" - PORT Comment: SERIAL 00000000-01626019
7	32-30722	TUBE, WATER INLET
8	26-26207	SEAL, RUBBER-WATER INLET TUBE
9	23-29591	SLEEVE, RUBBER-WATER INLET TUBE
10	27-26198	GASKET,DRIVE SHAFT HOUSING TO BOTTOM COWL
11	12-20086	WASHER, POWERHEAD STUDS
12	11-8M0204726	NUT, POWERHEAD STUDS
13	11-23161	NUTS, POWERHEAD STUDS
14	19-32298	PLUG, PLASTIC-TRIM TAB SCREW HOLE BLACK
15	11-8M0204653	NUT, GEAR HOUSING AND RIVER SHAFT HOUSING STUDS
16	11-29489	NUT, GEAR HOUSING AND DRIVE SHAFT HOUSING STUDS
17	30721	ROD, PUSH-REVERSE LOCK
18	17-30615	PIN, REVERSE LOCK LEVER
19	24-30618	SPRING, TENSION-PUSH ROD
20	52920	LEVER, REVERSE LOCK
21	12-20546	WASHER, PUSH ROD
22	18-25191	COTTER PIN, PUSH ROD TO REVERSE LOCK
23	30614	BOOT, RUBBER-PUSH ROD
24	31039	RETAINER, PUSH ROD RUBBER BOLT
25	31264	CAP, RUBBER-UPPER MOUNT BOLT NUT
26	11-8M0204653	NUT, UPPER MOUNT BOLT
27	12-31263	WASHER, UPPER MOUNT BOLT
28	12-31261	WASHER, RUBBER-UPPER MOUNT BOLT
29	12-31262	WASHER, UPPER MOUNT BOLT
30	31260	COVER, UPPER MOUNT-OUTSIDE HALF
31	53141	COVER, UPPER MOUNT-INSIDE HALF
32	75296	MOUNT, RUBBER-UPPER
33	24929	PACKING, "U" CUP
34	10-20012	SCREW, UPPER MOUNT COVER (1 5/8")
35	10-28775	SCREW, UPPER MOUNT COVER (2 1/8")
36	12-8M0204649	WASHER, UPPER MOUNT COVER SCREWS
37	11-35888	NUT, UPPER MOUNT COVER SCREWS
38	25067	BUMPER, RUBBER-MOUNTING SCREW
39	10-75284	SCREW, UPPER MOUNT ( 5 1/2")
40	37399	MOUNT, RUBBER-LOWER
41	11-25096	NUT, MOUNTING SCREW
42	26337	COVER, LOWER MOUNT-STARBOARD Comment: SERIAL 00000000-01626019
43	10-29256	SCREW,LOWER MOUNT COVER FASTENING Comment: SERIAL 00000000-01626019
44	35608	CLAMP, LOWER MOUNT TO DIRVE SHAFT HOUSING 1626019 Comment: SERIAL 01648888-09999999
45	24-35522	SPRING, TENSION-LOWER MOUNT CLAMP Comment: SERIAL 01648888-09999999
47	11-35521	NUT, LOWER MOUNT CLAMP COVER Comment: SERIAL 01648888-09999999
48	35474T	COVER, LOWER MOUNT CLAMP Comment: SERIAL 01648888-09999999
49	10-29722	SCREW, COVER TO LOWER MOUNT CLAMP Comment: SERIAL 01648888-09999999

▶FLYWHEEL ASSEMBLY AND STRATOR (22 parts)

Ref	OEM Part #	Part Name
1	11-8M0214915	NUT, FLYWHEEL
2	12-33001	WASHER, FLYWHEEL NUT
3	28-45554	KEY,FLYWHEEL DRIVE
4	225-2494A3	FLYWHEEL ASSEMBLY, COMPLETE SEE NOTE BELOW
5	23-32157	SPACER LOWER-FLEXIBLE PLATE
6	23-32174	SPACER, UPPER-FLEXIBLE PLATE
7	50-30745	RATCHET, FLYWHEEL
8	10-32156	SCREW,SPACERS AND RATCHET TO FLEXIBLE PLATE
9	11-8M0207775	NUT,SPACER AND RATCHET FASTENING SCREW
10	10-32156	SCREW, FLEXIBEL PLATE TO FLYWHEEL
11	10-32417	SCREW, PLATE AND HUB TO FLEXIBLE PLATE
12	29788	FLANGE,FLYWHEEL PULLEY
13	30306	PULLEY, FLYWHEEL
14	17-26618	PIN, DOWEL-PULLEY TO FLYWHEEL
15	29787	HUB, FLYWHEEL PULLEY
16	398-2188	STATOR, ALTERNATOR SEE NOTE BELOW
17	30050	TERMINAL, STATOR LEAD WIRE
18	10-57021	SCREW,STATOR TO UPPER END CAP SEE NOTE BELOW
19	54-24836	CLIP, STATOR LEAD TO EXHAUST COVER
20	8M0084613	"D" WASHER, CLIP FASTENING SCREW
21	10-8M0113176	SCREW, STATOR LEAD CLIP FASTENING
22	54-22783	"S" CLIP,STATOR LEADS TO BOTTOM COWL

▶FUEL PUMP AND FUEL LINE ASSEMBLY (31 parts)

Ref	OEM Part #	Part Name
1	30269A2	FUEL PUMP ASSEMBLY-UPPER
2	27-23005	GASKET, CHEVK VALVE TO HOUSING
3	21-8M0082362	VALVE, CHECK-FUEL PUMP
4	23004	RETAINER, CHECK VALVE
5	10-43725	SCREW, RETAINER TO HOUSING
6	27-24863	GASKET, FUEL PUMP
7	23014	DIAPHRAGM, FUEL PUMP
8	30461A2	FUEL PUMP ASSEMBLY-LOWER
9	30275	COVER, FUEL PUMP
10	27-30276	GASKET, FUEL PUMP COVER
11	10-29878	SCREW, FUEL PUMP MOUNTING (1 1/2")
12	10-30274	SCREW, FUEL PUMP MOUNTING (1 3/4")-UPPER PUMP
13	10-30273	SCREW, FUEL PUMP MOUNTING (1 7/8")-LOWER PUMP
14	32-32256A1	FUEL LINE ASS'Y PUMP OUTLET TO CARBURETOR (9 7/8")
15	22-30174	ELBOW, UPPER CARBURETOR STRAINER COVER
16	22-30175	SLEEVE, UPPER CARBURETOR STRAINER COVER ELBOW
17	22-30177	NUT, UPPER CARBURETOR STRAINER COVER ELBOW
18	32-31552A1	FUEL LINE ASS'Y PUMP OUTLET TO PUMP INLET (12 3/8")
19	32-31553A1	FUEL LINE ASS'Y PUMP OUTLET TO CARBURETOR (19 3/4")
20	32-30176	FUEL LINE, ADAPTOR TO LOWER FUEL PUMP INLET
21	22-30174	ELBOW, LOWER FUEL PUMP INLET
22	22-30175	SLEEVE, FUEL PUMP INLET ELBOW
23	22-30177	NUT, FUEL PUMP INLET ELBOW
24	30186	ADAPTOR, CHECK UNIT (FUEL LINE)
25	30187	STEM, CHECK UNIT ADAPTOR
26	25-16524	"O" RING, ADAPTOR STEM
27	24-30189	SPRING, ADAPTOR STEM
28	30188	CUP WASHER, ADAPTOR
29	10-56500	SCREW, ADAPTOR TO BOTTOM COWL
30	11-8M0207775	NUT, ADAPTOR FASTENING SCREW
31	32-31550A1	FUEL LINE ASS'Y,UPPER TO CENTER TO LOWER CARBURETOR (6")

▶GEAR HOUSING ASSEMBLY, COMPLETE (MERC 850E) (PAGE 1) (51 parts)

Ref	OEM Part #	Part Name
1	1623-2022A8	GEAR HOUSING ASSEMBLY
2	16-57921	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (3 15/16")
3	16-8M0133358	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (2")
4	16-30669	STUD, WATER PUMP BASE AND BODY TO GEAR HOUSING (3 1/4")
5	16-306671	STUD, WATER PUMP BASE AND BODY TO GEAR TO GEAR HOUSING (3
6	31-32898T	BEARING, ROLLER-DRIVE SHAFT
7	45-38459	DRIVE SHAFT (STANDARD)
8	43-31419	GEAR, PINION-DRIVE SHAFT
9	11-30932	NUT, PINION GEAR TO DRIVE SHAFT
10	15-30278A1	SHIM, WATER PUMP BASE TO GEAR HOUSING
11	30-63326T	BEARING, BALL-DRIVE SHAFT
12	53-30726	RING, RETAINGING-BALL BEARING
13	25-8M0204651	"O" RING, WATER PUMP BASE
14	46-31277A1	WATER PUMP BASE ASSEMBLY
15	26-94038	OIL SEAL, WATER PUMP BASE
16	17-29596T	DOWEL PIN, WATER PUMP BASE TO WATER PUMP BODY
17	27-31285	GASKET, LOWER-WATER PUMP BASE TO FACE PLATE
18	31287	PLATE, FACE -WATER PUMP BASE TO WATER PUMP BODY
19	27-31286	GASKET, UPPER-FACE PLATE TO WATER PUMP BODY
20	46-31273A1	WATER PUMP BODY ASSEMBLY
21	30915	INSERT, WATER PUMP BODY
22	26-16977	OIL SEAL,WATER PUMP BODY
23	47-89984T4	IMPELLER, WATER PUMP
24	17-8M0214994	PIN, IMPELLER DRIVE
25	10-30720	SCREW, WATER PUMP BODY TO GEAR HOUSING (1/4)
26	13-26992	LOCKWASHER, WATER PUMP BODY FASTENING SCREW AND STUDS (1/4)
27	11-29598	NUT, WATER PUMP BODY FASTENING STUDS (1/4)
28	13-8M0204647	LOCKWASHER, WATER PUMP BODY FASTENING STUD (5/16)
29	11-28770	NUT, WATER PUMP BODY FASTENING STUD (5/16)
30	25-8M0214918	RING, RUBBER-CENTRIFUGAL SLINGER (DRIVE SHAFT)
31	26-38970	SEAL,RUBBER-WATER PUMP BODY
32	23-29804T	SLEEVE, GUIDE-WATER INLET TUBE
33	25-8M0214919	"O" RING, UPPER-DRIVE SHAFT
34	26-31282	SEAL, WATER PUMP BODY TO WATER INTAKE TUBE
35	32-31272	TUBE, WATER INTAKE-GEAR HOUSING
36	26-29971	SEAL, GEAR HOUSING TO WATER INTAKE TUBE
37	25136	SHAFT, SHIFT-LOWER
38	53-29641	SLIP, RETAINING-SHIFT SHAFT
39	25-25439	"O" RING, SHIFT SHAFT BUSHING
40	23-8M0112749	BUSHING ASSEMBLY, SHIFT SHAFT
41	26-892361	OIL SEAL, SHIFT SHAFT BUSHING
42	12-31266	WASHER, RUBBER-SHIFT SHAFT BUSHING
43	52918	CAM, LOWER-REVERSE LOCKING
44	52919	CAM, UPPER-REVERSE LOCKING
45	23-30607	SPACER,NYLON-REVERSE LOCKING CAM
46	22-390721	PLUG, PIPE-SHIFT SHAFT GREASE FILLER HOLE
47	10-79953Q04	SCREW, GREASE FILLER AND VENT HOLE
48	12-191833	WASHER,GREASE FILLER AND VENT HOLE SCREW
49	10-29608	SCREW, GEAR HOUSING FLUSHING HOLE
50	27-8M0214916	GASKET, GEAR HOUSING FLUSHING HOLE SCREW
51	26-8M0214917	SEAL, GEAR HOUSING FLUSHING HOLE

▶GEAR HOUSING ASSEMBLY, COMPLETE (MERC 850E) (PAGE 2) (35 parts)

Ref	OEM Part #	Part Name
1	1623-2022A8	GEAR HOUSING ASSEMBLY (SEE PAGE 31 FOR PARTS BREAKDOWN)
52	760394	CAM, SHIFT
53	30625	FOLLOWER, CAM
54	30624	SLIDE, CROSS PIN
55	24-30622	SPRING, COMPRESSION-CAM FOLLOWER
56	43-53100A3	FORWARD GEAR ASSEMBLY, COMPLETE
57	43-53100A3	FORWARD GEAR ASSEMBLY
58	31-30895T	BEARING, ROLLER-FORWARD GEAR ASSEMBLY
59	31-30894A1	TAPERED ROLLER BEARING ASSEMBLY
60	31-31092	CUP, TAPERED ROLLER BEARING
61	52-822539T	RATCHET, SLIDING CLUTCH
62	17-8M0100263	PIN, CROSS-RATCHET TO PROPELLER SHAFT
63	24-30893	SPRING, RETAINING-CROSS PIN
64	43-31418A1	REVERSE GEAR ASSEMBLY, COMPLETE
65	43-31887	REVERSE GEAR ASSEMBLY
66	30-31265	BEARING, BALL-REVERSE GEAR ASSEMBLY
67	15-29955A1	SHIM, THRUST WASHER TO GEAR HOUSING
68	12-71143A1	WASHER, THRUST-BEARING CARRIER TO GEAR HOUSING
69	25-29976	"O" RING, BEARING CARRIER
70	31284T1	BEARING CARRIER ASSEMBLY
71	31-30956T	BEARING, ROLLER-BEARING CARRIER
72	26-8M0204670	OIL SEAL, BEARING CARRIER
73	28-30281	KEY, LOCATING-BEARING CARRIER
74	12-29957	WASHER, GEAR HOUSING COVER
75	52699	COVER, GEAR HOUSING
76	12-31013	WASHER, THRUST-BEARING CARRIER
77	30581A1	THRUST HUB AND WASHER ASSEMBLY
78	12-29590	WASHER, CUPPED-THRUST HUB
79	12-31211Q03	WASHER, SPLINED-PROPELLER SHAFT
80	14-816629Q	TAB WASHER, PROPELLER NUT
81	11-29594	NUT, PROPELLER
82	31237	WATER PICKUP, GEAR HOUSING
83	27-30557	GASKET, WATER PICKUP TO GEAR HOUSING
84	10-30559	SCREW, WATER PICKUP TO GEAR HOUSING (2 1/4")
85	10-30206	SCREW,GEAR HOUSING TO DRIVE SHAFT HOUSING (1")

▶GEAR HOUSING ASSEMBLY, COMPLETE (MERC 850E-1) (PAGE 1) (49 parts)

Ref	OEM Part #	Part Name
1	1623-2022A1	GEAR HOUSING ASSEMBLY
2	16-57921	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (3 15/16")
3	16-8M0133358	STUD, GEAR HOUSING TO DRIVE SHAFT HOUSING (2")
4	16-30669	STUD, WATER PUMP BASE AND BODY TO GEAR HOUSING (3 1/4" )
5	16-306671	STUD, WATER PUMP BASE AND BODY TO GEAR HOUSING (3 1/8")
6	31-32898T	BEARING, ROLLER-DRIVE SHAFT
7	45-38459	DRIVE SHAFT (STANDARD)
8	43-31419	GEAR, PINION-DRIVE SHAFT
9	11-30932	NUT, PINION GEAR TO DRIVE SHAFT
10	15-30278A1	SHIM WATER PUMP BASE TO GEAR HOUSING
11	30-63326T	BEARING, BALL-DRIVE SHAFT
12	53-30726	RING, RETAINING -BALL BEARING
13	27-32438	GASKET, WATER PUMP BASE TO GEAR HOUSING
14	25-8M0204651	"O" RING, WATER PUMP BASE
15	46-48758A1	WATER PUMP BASE ASSEMBLY
16	26-94038	OIL SEAL, WATER PUMP BASE
17	17-29596T	DOWEL PIN, WATER PUMP BASE TO WATER PUMP BODY
18	27-8M0090319	GASKET, LOWER-WATER PUMP BASE TO FACE PLATE
19	8M0204677	PLATE, FACE-WATER PUMP BASE TO WATER PUMP BODY
20	27-858524	GASKET, UPPER-FACE PLATE TO WATER PUMP BODY
21	46-96148A8	WATER PUMP BODY ASSEMBLY
22	30915	INSERT, WATER PUMP BODY
23	26-16977	OIL SEAL, WATER PUMP BODY
24	47-89984T4	IMPELLER, WATER PUMP
25	17-8M0214994	PIN, IMPELLER DRIVE
26	10-30720	SCREW, WATER PUMP BODY TO GEAR HOUSING (1/4)
27	13-26992	LOCKWASHER, WATER PUMP BODY FASTENING SCREW AND STUDS(1/4)
28	11-29598	NUT, WATER PUMP BODY FASTENING STUDS (1/4)
29	13-8M0204647	LOCKWASHER, WATER PUMP BODY FASTENING STUD (5/16)
30	11-28770	NUT, WATER PUMP BODY FASTENING STUD (5/16)
31	25-8M0214918	RING, RUBBER-CENTRIFUGAL SLINGER (DRIVE SHAFT)
32	26-38970	SEAL, RUBBER-WATER PUMP BODY
33	23-29804T	SLEEVE, GUIDE-WATER INLET TUBE
34	25-8M0214919	O" RING, UPPER-DRIVE SHAFT
35	25136	SHAFT, SHIFT-LOWER
36	53-29641	CLIP, RETAINING-SHIFT SHAFT
37	25-25439	"O" RING, SHIFT SHAFT BUSHING
38	23-8M0112749	BUSHING ASSEMBLY, SHIFT SHAFT
39	26-892361	OIL SEAL, SHIFT SHAFT BUSHING
40	12-31266	WASHER, RUBBER-SHIFT SHAFT BUSHING
41	52918	CAM, LOWER-REVERSE LOCKING
42	52919	CAM,UPPER-REVERSE LOCKING
43	23-30607	SPACER,NYLON-REVERSE LOCKING CAM
44	22-390721	PLUG, PIPE-SHIFT SHAFT GREASE FILLER HOLE
45	10-79953Q04	SCREW, GREASE FILLER AND VENT HOLE
46	12-191833	WASHER, GREASE FILLER AND VENT HOLE SCREW
47	10-29608	SCREW, GEAR HOUSING FLUSHING HOLE
48	27-8M0214916	GASKET, GEAR HOUSING FLUSHING HOLE SCREW
49	26-8M0214917	SEAL, GEAR HOUSING FLUSHING HOLE

▶GEAR HOUSING ASSEMBLY, COMPLETE (MERC 850E-1) (PAGE 2) (33 parts)

Ref	OEM Part #	Part Name
1	1623-2022A1	GEAR HOUSING ASSEMBLY (SEE PAGE 35 FOR PARTS BREAKDOWN)
50	760394	CAM, SHIFT
51	30625	FOLLOWER, CAM
52	30624	SLIDE, CROSS PIN
53	24-30622	SPRING, COMPRESSION-CAM FOLLOWER
54	15-30923A1	SHIM, BEARING OUTER RACE TO GEAR HOUSING
55	43-53100A3	FORWARD GEAR ASSEMBLY
56	31-30895T	BEARING, ROLLER-FORWARD GEAR
57	25-29976	"O" RING, BEARING CARRIER
58	31-31092	CUP, TAPERED ROLLER BEARING
59	52-822539T	RATCHET, SLIDING CLUTCH
60	17-8M0100263	PIN, CROSS-RATCHET TO PROPELLER SHAFT
61	24-30893	SPRING, RETAINING-CROSS PIN
62	44-47900A2	SHAFT, PROPELLER
63	43-31887	REVERSE GEAR ASSEMBLY
64	30-31265	BEARING, BALL-REVERSE GEAR
65	12-71143A1	WASHER, THRUST-BEARING CARRIER TO GEAR HOUSING
66	15-29955A1	SHIM, THRUST WASHER TO GEAR HOUSING
68	31284T1	BEARING CARRIER ASSEMBLY
69	31-30956T	BEARING, ROLLER-BEARING CARRIER
70	26-8M0204670	OIL SEAL, BEARING CARRIER
71	28-30281	KEY, LOCATING- BEARING CARRIER
72	12-29957	WASHER, GEAR HOUSING COVER
73	52699	COVER, GEAR HOUSING
74	12-31013	WASHER, THRUST-BEARING CARRIER
75	30581A1	THRUST HUB AND WASHER ASSEMBLY
76	12-29590	WASHER, CUPPED-THRUST HUB
77	12-31211Q03	WASHER, SPLINED-PROPELLER SHAFT
78	14-816629Q	TAB WASHER, PROPELLER NUT
79	11-29594	NUT, PROPELLER
80	97-31640Q4	TRIM TAB, GEAR HOUSING
81	10-32470	SCREW, TRIM TAB TO GEAR HOUSING (1 3/4")
82	10-30206	SCREW, GEAR HOUSING TO DRIVE SHAFT HOUSING (1")

▶STARTER MOTOR, STARTER SOLENOID, RECTIFIER AND WIRING HARNES (61 parts)

Ref	OEM Part #	Part Name
1	32667	WIRING HARNESS, INTERNAL
2	30050	TERMINAL, INTERNAL WIRING HARNESS LEADS
3	26079A2	PLATE, WIRING HARNESS TO BOTTOM COWL
4	10-45893	SCREW, WIRING HARNESS PLATE FASTENING
5	24-28975	SPRING, GARTER-INTERNAL WIRING HARNESS
6	54-22783	"S" CLIP, RECTIFIER WIRING HARNESS LEAD TO BOTTOM COWL
7	32177A2	RECTIFIER ASSEMBLY
7A	32177A2	RECTIFIER ASSEMBLY
8	13-8M0204647	LOCKWASHER, RECTIFIER MOUNTING SCREW
8A	10-26065	SCREW, RECTIFIER TO MOUNTING BRACKET
9	11-21929	NUT, RECTIFIER MOUNTING SCREW
9A	11-29250	NUT, RECTIFIER MOUNTING SCREW
10	32-28373	SLEEVE,RUBBER-RECTIFIER HARNESS LEAD
10A	10-35400	SCREW, HARNESS TERMINAL LEAD TO RECTIFIER
11	32-28052	SLEEVE, RUBBER-RECTIFIER HARNESS LEAD
11A	13-26996	LOCKWASHER, RECTIFIER STATOR LEAD TERMINALS
12	10-35400	SCREW, HARNESS AND STATOR LEADS TO RECTIFIER
12A	11-68219	NUT, FASTENING-RECTIFIER STATOR LEADS
13	11-8M0204718	NUT, HARNESS AND STATOR LEAD FASTENING SCREW
14	50-58788A3	STARTER MOTOR ASSEMBLY (DELCO-REMY)
15	32084	PLATE, SPACER-STARTER MOTOR
16	10-22698	SCREW, STARTER MOTOR TO CRANKCASE FLANGE
17	13-8M0204647	LOCKWASHER, STARTER MOTOR FASTENING SCREW
18	38747	BRACKET, SUPPORT-STARTER MOTOR
19	13-24669	LOCKWASHER, THRU BOLT-BRACKET TO STARTER MOTOR
20	11-20890	NUT, THRU BOLT-BRACKET TO STARTER MOTOR
21	84-93388A14	CABLE, WIRE-STARTER MOTOR TO STARTER SOLENOID
22	54-20534	CLAMP, LOWER CABLE-STARTER MOTOR TO SOLENOID
23	10-69035	SCREW, WIRING HARNESS GROUND LEAD TO STARTER MOTOR
24	32082	STARTER SOLENOID
25	32278A1	GROUND STRAP ASSEMBLY, STARTER SOLENOID TO STARTER MOTOR
26	13-8M0204647	LOCKWASHER, SOLENOID TERMINAL (5/16)
27	11-22053	NUT, SOLENOID TERMINAL (5/16)
28	10,13-26996	LOCKWASHER, SOLENOID TERMINAL
29	10,11-68219	NUT,SOLENOID TERMINAL
30	10-29282	SCREW,SOLENOID TO STARTER MOTOR (3/4)
31	54-22740	CLIP, HARNESS LEAD WIRES TO SUPPORT BRACKET
32	8M0084613	"D" WASHER, CLIP FASTENING SCREW
33	10-62568	SCREW, LEAD WIRE CLIP FASTENING
34	54-22627	CLAMP, WIRING HARNESS TO STARTER MOTOR SUPPORT BRACKET
35	8M0084613	"D" WASHER, HARNESS CLAMP SCREW
36	10-62568	SCREW, HARNESS CLAMP FASTENING
37	29714	BLOCK, TERMINAL-UPPER FUEL PUMP PAD
38	10-22245	SCREW, TERMINAL BLOCK FASTENING
39	13-26996	LOCKWASHER, TERMINAL BLOCK FASTENING SCREW
40	30449	SNUBBER, RESISTOR TO TRANSFER PORT COVER SCREW
41	82-72878A1	BALLAST,IGNITION COIL
42	10-28666	SCREW, BALLAST AND PORT COVER MOUNTING (1")
43	13-26992	LOCKWASHER, RESISTOR,BALLAST AND COVER MOUNTING SCREW
44	12-69057	WASHER, RESISTOR,BALLAST AND COVER MOUNTING SCREW
45	12-30191	WASHER, JUMPER LEADS FASTENING SCREW
46	13-26995	LOCKWASHER, JUMPER LEADS FASTENING SCREW
47	11-21923T	NUT, BALLAST JUMPER LEADS FASTENING
48	10-35400	SCREW, HARNESS AND JUMPER LEADS TO TERMINAL BLOCK
49	54-24836	CLIP, WIRING HARNESS TO CRANKCASE FLANGE AND COVER
50	8M0084613	"D" WASHER, HARNESS CLIP SCREW
51	10-8M0113176	SCREW, HARNESS CLIP FASTENING
52	30212	BLOCK, TERMINAL-EXHAUST COVER
53	10-72169	SCREW, TERMINAL BLOCK TO EXHAUST MANIFOLD COVER
54	10-62568	SCREW, HARNESS LEADS TO TERMINAL BLOCK
55	10-32471	SCREW, SOLENOID MOUNTING HOLES IN STARTER MOTOR

▶TOP COWL AND STARTER ASSEMBLY (48 parts)

Ref	OEM Part #	Part Name
1	182-1895A2	TOP COWL ASSEMBLY
2	16-20353	STUD, FRONT-TOP COWL TO CRANKCASE
3	25-20116	GROMMET, CHOKE KNOB
4	31476	REVEAL, AIR INTAKE
5	10-37370	SCREW, REVEAL TO TOP COWL
6	13-26996	LOCKWASHER, REVEAL TO TOP COWL FASTENING SCREW
7	31475	SCREEN, VENT-TOP COWL
8	10-26668	SCREW, VENT SCREEN TO TOP COWL
9	31298A1	PLATE ASSEMBLY, COWL MOUNTING
10	16-20353	STUD, REAR-TOP-COWL TO COVER
11	10-28668	SCREW, PLATE ASSEMBLY TO TOP COWL
12	12-20028	WASHER, TOP COWL STUD (1 1/16")
13	12-69057	WASHER, TOP COWL STUD (3/4" OD)
14	12-20583	WASHER, TOP COWL STUD (1/32")
15	11-8267089	NUT, TOP COWL FASTENING
16	30755	RETAINER, STARTER SPRING
17	24-30753	SPRING, STARTER REWIND
18	23-30754	BUSHING, SPRING GUIDE
19	50-30749	SHEAVE ASSEMBLY
20	20162	PAWL, STARTER
21	13-29402	WASHER, WAVE-STARTER PAWL
22	23-30752	BUSHING, NYLON-SHEAVE SHAFT SPACER
23	23-30759	SPACER, SHEAVE SHAFT
24	12-26180	WASHER, SHEAVE SHAFT TO STARTER SHEAVE
25	13-20160	WASHER, WAVE-WASHER TENSION
26	12-30758	WASHER, EQUALIZING RING-STARTER SHEAVE
27	30757	PLATE, RETAINER-STARTER PAWL
28	30756	SHAFT, SHEAVE
29	14-20165	TAB WASHER, SHEAVE SHAFT NUT
30	11-20166	NUT, SHEAVE SHAFT (LEFT HAND THREAD)
31	50-12066Q10	STARTER CABLE ASSEMBLY
32	28747	HANDLE, STARTER CABLE
33	79470A1	RETAINER, STARTER CABLE AND HANDLE
34	6-32,10-358811	SCREW,DRIVE-PLATE TO TOP COWL SEE NOTE BELOW
35	35880	PLATE, ROPE GUIDE SEE NOTE BELOW
36	31463	HANDLE, CHROME-TOP COWL
37	31487	HANDLE ASSEMBLY, INSIDE - TOP COWL
38	35496	PAD, BUMPER-TOP COWL HANDLE
39	12-20533	WASHER, CHROME HANDLE TO INSIDE HANDLE STUD
40	11-826709109	NUT, CHROME HANDLE TO INSIDE HANDLE FASTENING
41	10-29199	SCREW, FRONT-HANDLE TO TOP COWL (1")
42	12-20533	WASHER, FRONT SCREW-HANDLE TO TOP COWL
43	11-826709109	NUT, HANDLE TO TOP COWL STUD
44	29980A1	TRIM MOULDING ASSEMBLY-TOP COWL
45	10-29226	SCREW,DECORATIVE-MOULDING TO TOP COWL
46	10-29227	SCREW, BRASS-MOULDING TO TOP COWL
47	13-26995	LOCKWASHER, MOULDING FASTENING SCREW
48	11-26419	NUT, MOULDING FASTENING SCREW

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 850 (6 CYL.) running reliably season after season. Most of these tasks can be performed with basic tools and the factory service manual.

Replace water pump impeller and inspect wear plate
Change engine oil and oil filter (check drain plug washer)
Replace spark plugs and check ignition timing
Drain and refill lower unit gear oil; inspect for water contamination
Inspect fuel lines, primer bulb, and fuel filter for deterioration
Check and replace sacrificial anodes (zinc or aluminum)
Inspect propeller for damage; check shaft seal and cotter pin
Check valve clearance (refer to service manual for specifications)
Lubricate all grease points (steering, tilt tube, shift linkage)
Inspect control cables and throttle/shift linkage for smooth operation

Pro Tip: Always flush the engine with fresh water after saltwater use — even a quick 10-minute flush significantly extends component life.
Pro Tip: Use fuel stabilizer in the tank before winter storage, and fog the cylinders to prevent internal corrosion during extended periods of non-use.

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