Mercury 40 CARB (3 CYL.)(4-STROKE) (1B227000 THRU 1B344306) Parts & Diagrams

OEM and aftermarket replacement parts for Mercury 40 CARB (3 CYL.)(4-STROKE). Scroll down for exploded parts diagrams (34), specifications, and maintenance reference.

Mercury 40 CARB (3 CYL.)(4-STROKE) (1B227000 THRU 1B344306) Parts & Diagrams

🔎 Mercury 40 CARB (3 CYL.)(4-STROKE) Reference Library — Exploded parts diagrams (34 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 40 CARB (3 CYL.)(4-STROKE) is a 4-Stroke, Inline 4-Cylinder, EFI, SOHC outboard motor. Commonly used on jon boats, pontoons, and mid-size utility craft.

Quick Reference Specifications

Specification Value
Engine Type 4-Stroke, Inline 4-Cylinder, EFI, SOHC
Horsepower 40 HP
Displacement 995 cc
Bore x Stroke 65 mm x 75 mm
Spark Plug (Type & Gap) NGK IZFR6F-11
Engine Oil Capacity 3.0 L (3.17 quart)
Recommended Engine Oil SAE 25W-40 Mercury FourStroke Oil
Gear Case Oil Capacity 440 mL (14.9 fl oz)
Idle Speed (in gear) 700 ± 50 RPM (in gear)
Full Throttle RPM Range 5500-6000
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 40 CARB (3 CYL.)(4-STROKE):

  • 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 40 CARB (3 CYL.)(4-STROKE).

Accessories (1 parts) Accessories
Ref OEM Part # Part Name
- 816667A2 BRACKET ASSEMBLY, Steering Comment: (Without Carrying Handle)
Adaptor Plate (24 parts) Adaptor Plate
Ref OEM Part # Part Name
1 8M0162935 DIPSTICK
2 825989003 DIPSTICK TUBE
3 8560552 SEAL
4 825228A17 ADAPTOR PLATE ASSEMBLY
5 19-822464 PLUG
6 19-48323 PLUG
7 17-23784 PIN, Dowel
8 22-629101 FITTING, Elbow - 90 Degree (.125-27)
9 54-816311T TIE STRAP, (8.00 Inches)
10 26-66301 SEAL, Oil Comment: (Long)
11 23-859594 BUSHING Comment: (Long)
12 22-889567 PLUG, (.500-14)
13 25-822408001 GROMMET (Short)
14 27-8M0213113 GASKET
15 25-845746 O-RING
16 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
17 8M0210772 BODY, Oil Pressure Relief
18 893765 PLATE, Oil Pickup-Top
19 32-854793 HOSE, Oil Pickup
20 893700 BAFFLE
21 54-855228 CLAMP
22 10-4007455 SCREW, (M6 x 55)
23 8289151 HEAT SHIELD
24 25-8M0179867 GROMMET
Bottom Cowl (18 parts) Bottom Cowl
Ref OEM Part # Part Name
1 4020-826277T1 BOTTOM COWL Comment: (Long-Port)
2 4020-826278T7 BOTTOM COWL Comment: (Long-Starboard)
3 10-82684430 SCREW, (M6 x 30)
4 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
5 825238002 SEAL
6 12-855576 WASHER
7 27-855627 GASKET
8 10-82684460 SCREW, (M6 x 60)
9 22-827948 FITTING
10 826273001 BOOT
11 54-816311T TIE STRAP, (8.00 Inches)
12 825782F1 LEVER, Cowl Latch
13 23-812707 BUSHING
14 13-12134 WASHER, Wave
15 893766 LATCH HOOK
16 10-1993716 SCREW, (M6 x 16)
17 8M0032848 RETAINER
18 812830T01 PLUG
Camshaft/Oil Pump (15 parts) Camshaft/Oil Pump
Ref OEM Part # Part Name
- 893504T02 CYLINDER HEAD ASSEMBLY
1 10-82761140 SCREW, (M10 x 40)
2 12-4002320 WASHER
3 8M0151040 BELT
4 833104T6 GEAR, Driven
5 17-878183 PIN, Dowel
6 400-8M0183249 CAMSHAFT
7 17-826149 PIN
8 857087T1 PUMP ASSEMBLY, Oil
9 25-857096 O-RING
10 NSS NOT SOLD SEPARATE, O Ring
11 25-857094 O-RING
12 25-857093 O-RING
13 10-875206 SCREW, (M6 x 16)
14 10-4000333 SCREW, (M6 x 40)
Carburetor (36 parts) Carburetor
Ref OEM Part # Part Name
- 8542561 REPAIR KIT, Carburetor Comment: (1 Per Carburetor)
1 3329-883313T4 CARBURETOR Comment: (Bottom)
2 10-854246 SCREW
3 854245 PLATE
4 27-8542572 GASKET
5 854254T2 ENRICHENER
6 NSS NOT SOLD SEPARATE, O Ring
7 854255 PLATE
8 19-880814 CAP
9 10-880841 SCREW, Adjusting
10 25-880842 O-RING
11 24-880815 SPRING
12 80391242 JET, Pilot
13 25-880843 O-RING
14 19-880844 PLUG
15 80391595 JET, Main
16 8039143 MAIN NOZZLE
17 854247 VALVE, Float
18 8542531 FLOAT
19 17-8542581 PIN, Float
20 10-880845 SCREW
21 27-8542573 GASKET
22 8039171 FLOAT BOWL Comment: (Center/Bottom)
23 10-8542463 SCREW
24 10-8542464 SCREW, Drain
25 12-8542591 WASHER
26 10-803925 SCREW, Synchronization (Top/Center)
27 24-880846 SPRING (Top/Center)
28 24-803923 SPRING (Top/Center)
29 10-803913 SCREW (Bottom)
30 24-854249 SPRING (Bottom)
31 24-880847 SPRING
32 8542511 PLUNGER
33 10-880848 SCREW
34 NSS NOT SOLD SEPARATE, Rubber Bellows
35 880849 PLUNGER ROD
Crankshaft, Pistons and Connecting Rods (15 parts) Crankshaft, Pistons and Connecting Rods
Ref OEM Part # Part Name
- 61-803016T06 POWERHEAD ASSEMBLY Comment: (Long)
1 401-858507T04 CRANKSHAFT ASSEMBLY Comment: (Long)
2 28-893761 KEY
3 28-91800 KEY, Woodruff
4 8M0151047 SEAL
5 8M0151048 SEAL
6 600-893530T01 CONNECTING ROD
7 10-8M0049884 BOLT
8 23-893630002 BEARING, Blue
9 700-893524T02 PISTON Comment: (.50MM Oversized)(Bare Piston)
10 39-893525A03 RING, Piston (Top) Comment: (.50MM Oversized)
11 NSS NOT SOLD SEPARATE, Piston Ring (Second) Comment: (.50 MM Oversized)
12 39-893950 RING, Oil
13 41-893863 PIN, Piston
14 40-825017 RETAINER
Cylinder Block (26 parts) Cylinder Block
Ref OEM Part # Part Name
- 61-803016T06 POWERHEAD ASSEMBLY Comment: (Long)
1 800-893500T02 CYLINDER BLOCK Comment: (Long Shaft)
2 17-825010 PIN, Dowel
3 22-479452 PLUG
4 22-384073 PLUG, Pipe (.500-14)
5 22-416223 PLUG, Pipe (.750-14)
6 23-893631002 BEARING, Blue
7 822625 NIPPLE, (M20)
8 10-82506182 SCREW, (M8 x 82)
9 10-8M0205943 SCREW, (M6 x 35)
10 27-8M0163129 GASKET
11 35-8M0162830 FILTER, Oil Comment: (Quicksilver Branded)
12 27-8M4500244 GASKET
13 8M0183025 COVER, Exhaust
14 22-479452 PLUG
15 855676003 THERMOSTAT
16 27-8M0177107 GASKET
17 8M0188835 COVER
18 10-8M0205943 SCREW, (M6 x 35)
19 22-996642 FITTING, Elbow 90 Degree (.125-27 x .250) Nylon
20 54-816311T TIE STRAP, (8.00 Inches)
21 8M0214984 SENSOR ASSEMBLY
22 25-627021 O-RING, (.301 x .070)
23 893697 LIFTING EYE
24 10-857139 SCREW, (M8 x 35)
25 32-77653101 HOSE, (48.00 Inches Bulk) (Cut to 19 Inches)- To Fitting in Adaptor Plate
Cylinder Head (25 parts) Cylinder Head
Ref OEM Part # Part Name
- 61-803016T06 POWERHEAD ASSEMBLY Comment: (Long)
1 900-8M0224247 CYLINDER HEAD
2 858266 GUIDE
3 10-4000325 SCREW, (M6 x 8)
4 12-859768 WASHER
5 26-893549 SEAL, Oil
6 22-875209 PIPE PLUG
7 25-8M0162934 O-RING
8 8M0174399 COVER
9 22-825054 BREATHER PIPE
10 855236 PLATE, Baffle
11 10-4005685 SCREW, (M4 x 10)
12 NSS NOT SOLD SEPARATE, Decal- Servicing Referral
13 NSS NOT SOLD SEPARATE, Decal-Engine Oil/Valve Clearance
14 27-8M0118180 GASKET
15 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
16 10-82503395 SCREW, (M9 x 95)
17 10-893745025 SCREW, (M6 x 25)
18 22-629101 FITTING, Elbow - 90 Degree (.125-27)
19 830294T1 BRACKET (Handle)
20 10-40011126 SCREW, (M6 x 13) Stainless Steel (Handle)
21 859578A1 PLUG ASSEMBLY, Oil
22 25-8M0204673 O-RING, (.921 x .139)
23 NSS NOT SOLD SEPARATE, Decal- Horse Power Identification
24 17-825010 PIN, Dowel
Driveshaft Housing(Long) (25 parts) Driveshaft Housing(Long)
Ref OEM Part # Part Name
1 1503-852421T07 HOUSING, Driveshaft
2 825220T06 PIPE, Exhaust
3 10-824459110 SCREW, (M8 x 110) Stainless Steel
4 10-88960845 SCREW, (M8 x 45)
5 8288181 PLUG, Drain
6 27-8M0204692 GASKET
7 826276 BUMPER
8 8M0151042 GROMMET
9 16-823984 STUD, (M10 x 50)
10 12-8M0214963 WASHER, (.406 x .750 x .105) Stainless Steel
11 11-40140 NUT, (M10)
12 32-897971A01 TUBE, Water
13 54-828529 GUIDE
14 8M0043364 BUMPER
15 42941001 SEAL, Water Tube
16 893770 PLATE
17 10-1993325 SCREW, (M10 x 25 MM)
18 19-892286 CAP
19 54-816311T TIE STRAP, (8.00 Inches)
20 22-8M0181450 FITTING
21 23-813745 SPACER
22 43585 COUPLING
23 23-855623 BUSHING
24 12-45176 WASHER, (.453 x .812 x .105) Stainless Steel
25 11-40140 NUT, (M10)
Driveshaft Housing(Short) (13 parts) Driveshaft Housing(Short)
Ref OEM Part # Part Name
1 42941001 SEAL, Water Tube
2 1501-850168T5 HOUSING, Driveshaft
3 NSS NOT SOLD SEPARATE, Exhaust Pipe
4 10-824459110 SCREW, (M8 x 110) Stainless Steel
5 10-88960845 SCREW, (M8 x 45)
6 8288181 PLUG, Drain
7 27-8M0204692 GASKET
8 826276 BUMPER
9 54-828529 GUIDE
10 16-823984 STUD, (M10 x 50)
11 12-8M0214963 WASHER, (.406 x .750 x .105) Stainless Steel
12 11-40140 NUT, (M10)
13 32-897970A01 TUBE, Water
Electrical Components (20 parts) Electrical Components
Ref OEM Part # Part Name
- 61-803016T06 POWERHEAD ASSEMBLY Comment: (Long)
1 8M0082988 SENSOR
2 10-40011107 SCREW, (M5 x 16) Stainless Steel
3 10-82130025 SCREW, (M6 x 25)
4 12-8M0214930 WASHER
5 859224 PLATE
6 23-856954 BUSHING
7 25-8M0190980 GROMMET
8 87843302S ECM, Engine Control Module
9 23-8539201 BUSHING
10 10-82129140 SCREW, (M6 x 40)
11 84-859196T1 HARNESS ASSEMBLY, Engine Wiring
12 54-816311T TIE STRAP, (8.00 Inches)
13 87-8M0098207 PRESSURE SWITCH
14 33-827858Q SPARK PLUG, NGK-DPR6EA-9
15 339-858942T1 COIL ASSEMBLY, Ignition
16 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
17 10-8248324 SCREW, (M6 x 16)
18 54-8M0024808 J CLIP
19 10-40011149 SCREW, (M8 x 25) Stainless Steel
Flywheel (11 parts) Flywheel
Ref OEM Part # Part Name
- 61-803016T06 POWERHEAD ASSEMBLY Comment: (Long)
1 284-832010T27 FLYWHEEL
2 NSS NOT SOLD SEPARATE, Decal-Warning Spinning Flywheel
3 NSS NOT SOLD SEPARATE, Decal-Timing Marks
4 NSS NOT SOLD SEPARATE, Decal-Warning-Neutral
5 11-893789 NUT
6 12-893762 WASHER
7 10-4013930 SCREW, (M5 x 30)
8 398-852386T6 STATOR
9 834838 LOAD RING
10 833102T GEAR, Drive
Fuel Lines (17 parts) Fuel Lines
Ref OEM Part # Part Name
1 32-856607 HOSE
2 32-856609 HOSE
3 856610 LINKAGE
4 23-803896 BUSHING
5 823548T TIE STRAP
6 32-856613 HOSE
7 32-856611 HOSE and SLEEVE
8 22-822771 CONNECTOR
9 22-878404 FITTING, 45 Degree
10 32-878423 HOSE
11 32-85682239 TUBING, (17.00 Inches Bulk) (Cut to 3.5 Inches)
12 32-82381310 HOSE, (80 mm)
13 54-878425 CLIP
14 56762 TIE STRAP, (4.00 Inches)
15 12-8542592 WASHER
16 18-880850 COTTER PIN
17 22-878593 Y-CONNECTOR
Fuel Pump (13 parts) Fuel Pump
Ref OEM Part # Part Name
- 25-16524 O-RING, Fuel Connector
1 8M0141844 PUMP, Fuel Comment: (Sold Complete Only)
2 8M0007776 DEFLECTOR, Cowl
3 10-82684430 SCREW, (M6 x 30)
4 32-8M0108349 TUBING, (.312) (70.00 Inches Bulk) (Cut to 13 Inches) To Block Exhaust Cover
5 32-8M0108349 TUBING, (.312) (70.00 Inches Bulk) (Cut to 6 Inches) To Telltale
6 32-856611 HOSE and SLEEVE, To Float Bowl
7 54-8M0024808 J CLIP
8 32-8M0108355 HOSE, (57.00 Inches Bulk) (Cut to 14 Inches)
9 35-877565T1 FILTER, Fuel
10 32-8M0108355 HOSE, (57.00 Inches Bulk) (Cut to 19 Inches)
11 54-816311T TIE STRAP, (8.00 Inches)
12 22-8M0148585 CONNECTOR ASSEMBLY, Fuel
Gear Housing(Driveshaft-Long-2:1 Gear Ratio) (37 parts) Gear Housing(Driveshaft-Long-2:1 Gear Ratio)
Ref OEM Part # Part Name
- 46-812966A12 REPAIR KIT, Water Pump
1 1671-9760T42 GEAR HOUSING ASSEMBLY, Basic
2 10-79953Q04 SCREW KIT, (.375-16 x .250) Drain
3 10-79953Q04 SCREW KIT, (.375-16 x .250) Drain
4 12-191833 SEAL
5 17-8M0084244 PIN, Dowel - With Hole (.375 x .625)
6 17-43044 PIN, Dowel - Without Hole (.375 x .625)
7 22-878089 PLUG, Pipe (.0625-27)
8 31-812768 BEARING, Roller
9 818226A1 SEAL/PLATE KIT
10 NSS NOT SOLD SEPARATE, Filler Plate
11 43-8M0187297 GEAR, Pinion
12 11-55910 NUT, (.437-20)
13 859607A1 SHIFT SHAFT ASSEMBLY
14 53-29641 E RING
15 23-813696A2 BUSHING ASSEMBLY
16 25-45258 O-RING, (.987 x .103)
17 26-8M0204708 SEAL, Oil
18 45-859102 DRIVESHAFT, Long
19 15-812770A1 SHIM SET
20 31-8M0166756 BEARING ASSEMBLY, Roller
21 NSS NOT SOLD SEPARATE, Cup
22 11-8128201 NUT
23 46-812966A7 BASE ASSEMBLY, Water Pump
24 25-8M0204651 O-RING, (1.859 x .139)
25 26-814669 SEAL, Oil
26 26-814670 SEAL, Oil
27 47-19453T IMPELLER
28 28-8M0032831 KEY
29 12-8M0204720 WASHER
30 46-812966A12 PUMP ASSEMBLY, Water
31 27-8M0224241 GASKET (Lower)
32 27-822189 GASKET, Upper Water Pump (Upper)
33 19700A2 FACE PLATE
34 10-8248324 SCREW, (M6 x 16)
35 760394 CAM, Shift Control
36 8M0151045 COUPLER
Gear Housing(Driveshaft-Short-2:1 Gear Ratio) (39 parts) Gear Housing(Driveshaft-Short-2:1 Gear Ratio)
Ref OEM Part # Part Name
- 821354A04 REPAIR KIT, Water Pump
1 1682-821306T12 GEAR HOUSING ASSEMBLY, Basic
2 818226A1 SEAL/PLATE KIT
3 NSS NOT SOLD SEPARATE, Plate
4 10-79953Q04 SCREW KIT, (.375-16 x .250) Drain
5 12-191833 SEAL
6 10-79953Q04 SCREW KIT, (.375-16 x .250) Drain
7 12-191833 SEAL
8 11-55910 NUT, (.437-20)
9 43-821326T1 GEAR, Pinion - 13 Teeth
10 31-821321A2 BEARING ASSEMBLY
11 NSS NOT SOLD SEPARATE, Cup
12 10-8248324 SCREW, (M6 x 16)
13 46-821351A3 HOUSING ASSEMBLY, Water Pump Upper
14 8M0151044 SEAL, Water Tube
15 12-866451 WASHER
16 28-8M0214993 KEY
17 12-866451 WASHER
18 27-822189 GASKET, Upper Water Pump
19 27-8M0214956 GASKET, Lower Water Pump (Lower)
20 8213542 FACE PLATE
21 47-8M0204712 IMPELLER
22 46-821307A2 BASE ASSEMBLY, Water Pump
23 26-821309 SEAL
24 26-821310 SEAL
25 25-821308 O-RING, (1.421 x .139)
26 45-826193T2 DRIVESHAFT
27 30-821311 BEARING, Ball
28 823548T TIE STRAP
29 822158 BOOT
30 821827 RETAINER
31 25-26855 O-RING, (1.609 x .139)
32 25-85594 O-RING, (.239 x .174)
33 12-814803 WASHER
34 827865A2 SHIFT SHAFT
35 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
36 17-85593 PIN, (.078 x .437)
37 8213161 CAM, Shift
38 17-822369 PIN, (.125 x .625)
Gear Housing, Propeller Shaft - Long-2:1 Gear Ratio (33 parts) Gear Housing, Propeller Shaft - Long-2:1 Gear Ratio
Ref OEM Part # Part Name
- 26-814669A2 SEAL KIT, Gear Housing
1 1671-9760T42 GEAR HOUSING ASSEMBLY, Basic
37 15-812769A1 SHIM SET
38 31-8M0103476 BEARING ASSEMBLY, Tapered Roller
39 NSS NOT SOLD SEPARATE, Cup
40 43-893603T01 GEAR, Forward
41 31-21739 BEARING, Roller
42 8129291 FOLLOWER, Cam
43 20843 SLIDE
44 24-38114 SPRING
45 52-813697T CLUTCH
46 17-8M0020942 PIN, Cross
47 24-815418 SPRING
48 44-14493 PROPELLER SHAFT
49 43-893605T GEAR, Reverse
50 30-20839T BEARING, Ball
51 8M0168900 CARRIER ASSEMBLY, Bearing
52 25-815460 O-RING
53 31-21700 BEARING, Needle
54 26-8M0205511 SEAL, Oil
55 26-8M0203757 SEAL, Oil
56 10-85594030 SCREW, (M8 x 30)
57 12-855941 WASHER, (.323 x .590 x .112) Stainless Steel
58 8227731 INSERT, Threaded
59 NSS NOT SOLD SEPARATE, Decal-Gear Ratio
60 17264T2 TRIM TAB, Zinc
61 10-4000377 SCREW, (M10 x 30)
62 12-8M0214963 WASHER, (.406 x .750 x .105) Stainless Steel
63 73345A1 THRUST HUB
64 11-69578Q1 PROP NUT KIT
65 14-8M0214942 TAB WASHER
66 12-8M0214963 WASHER, (.406 x .750 x .105) Stainless Steel
67 10-4000380 SCREW, (M10 x 45)
Gear Housing, Propeller Shaft - Short-2:1 Gear Ratio (37 parts) Gear Housing, Propeller Shaft - Short-2:1 Gear Ratio
Ref OEM Part # Part Name
- 823547A03 SEAL KIT, Gear Housing
1 1682-821306T12 GEAR HOUSING ASSEMBLY, Basic
39 17-821327 PIN, Dowel
40 27-823942 GASKET
41 32-8M0026108 TUBE
42 19-824928001 PLUG, Rubber
43 821829 SCREEN
44 822157T2 TRIM TAB
45 10-82497020 SCREW, (M8 x 20)
46 12-72397 WASHER
47 43-821315T1 GEAR ASSEMBLY, Forward - 26 Teeth
48 31-8M0103470 BEARING ASSEMBLY, Roller
49 NSS NOT SOLD SEPARATE, Cup
50 31-41326 BEARING, Roller
51 821578 FOLLOWER, Cam
52 24-8261991 SPRING
53 17-8M0020999 PIN
54 52-821314T CLUTCH
55 24-38114 SPRING
56 44-8M0140441 PROPELLER SHAFT
57 43-821312T1 GEAR, Reverse - 26 Teeth
58 30-20839T BEARING, Ball
59 8M0168900 CARRIER ASSEMBLY, Bearing
60 25-815460 O-RING
61 31-21700 BEARING, Needle
62 26-8M0205511 SEAL, Oil
63 26-8M0203757 SEAL, Oil
64 12-855941 WASHER, (.323 x .590 x .112) Stainless Steel
65 10-85594030 SCREW, (M8 x 30)
66 8227731 INSERT, Threaded
67 NSS NOT SOLD SEPARATE, Decal 2:1
68 73345A1 THRUST HUB
69 11-69578Q1 PROP NUT KIT
70 14-8M0214942 TAB WASHER
71 10-4000380 SCREW, (M10 x 45)
72 12-8M0214963 WASHER, (.406 x .750 x .105) Stainless Steel
73 19-95925 PLUG
Intake (18 parts) Intake
Ref OEM Part # Part Name
- 27-825231A02 GASKET SET, Engine
1 10-82615890 SCREW, (M6 x 90)
2 856126T INTAKE, Air
3 25-856525 O-RING
4 834783T PLATE
5 834784T ISOLATOR
6 19-827633 PLUG
7 856127A2 ATTENUATOR ASSEMBLY, Sound
8 23-856954 BUSHING
9 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
10 54-850181 TIE STRAP, (11.750 Inches)
11 26-856128001 SEAL
12 25-8250572 O-RING
13 25-8250572 O-RING
14 17-23784 PIN, Dowel
15 10-8248326 SCREW, (M6 x 25 MM)
16 32-8M0182223 BREATHER HOSE
17 54-816311T TIE STRAP, (8.00 Inches)
Intake/Exhaust Valves (20 parts) Intake/Exhaust Valves
Ref OEM Part # Part Name
- 893504T02 CYLINDER HEAD ASSEMBLY
1 8M0065029 VALVE, Exhaust
2 832990T3 VALVE, Intake
3 26-858271 SEAL
4 24-893552 SPRING, Valve - Outer
5 822650 RETAINER
6 28-893554 KEY
7 898821A01 ROCKER ARM
8 10-825046 SCREW
9 11-826150 NUT
10 834780T1 SHAFT, Rocker
11 NSS NOT SOLD SEPARATE, Plug
12 893560 BRACKET
13 24-893562 SPRING
14 893561 BRACKET
15 24-854713 SPRING
16 27-893645 GASKET
17 17-859575 PIN
18 10-875218 SCREW, (M8 x 23)
19 24-893563 SPRING, Overload
Linkage (32 parts) Linkage
Ref OEM Part # Part Name
1 10-40011158 SCREW, (M8 x 70) Stainless Steel
2 10-8147763 SCREW, (M6 x 60)
3 11-401196 NUT, (M6)
4 42942 CAP
5 822682A4 LEVER ASSEMBLY, Throttle
6 23-825078 BUSHING
7 8535853 CAM, Throttle
8 23-309772 SPACER
9 12-4002314 WASHER
10 10-40056107 SCREW, (M5 x 16)
11 826588A4 SHIFT SHAFT ASSEMBLY, Horizontal (Short)
12 8277071 RETAINER (Short)
13 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel (Short)
14 18-210711 COTTER PIN (Short)
15 24-826077 SPRING, Detent (Short)
16 24-824993 SPRING, Backing (Short)
17 824994 SPRING, Plate (Short)
18 10-40011107 SCREW, (M5 x 16) Stainless Steel (Short)
19 10-8248326 SCREW, (M6 x 25 MM) (Long)
20 858245 SHIFT GUIDE (Long)
21 10-82239312 SCREW, (M5 x 12) (Long)
22 858246 SHIFT SLIDE (Long)
23 12016A2 DETENT/SPRING KIT (Long)
24 NSS NOT SOLD SEPARATE, Spring (Long)
25 858247 SHIFT ROD (Long)
26 18-210711 COTTER PIN (Long)
27 11-401386 NUT, (M6) Stainless Steel (Long)
28 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel (Long)
29 858248 SHIFT LINK (Long)
30 23-48475 BUSHING (Long)
31 23-850165 BUSHING (Long)
32 850166T2 LEVER ASSEMBLY, Shift Shaft
Manual Starter (33 parts) Manual Starter
Ref OEM Part # Part Name
- 835253A13 STARTER ASSEMBLY, Recoil
1 835253A12 HOUSING ASSEMBLY, Recoil
2 8167122 CAM
3 24-8267911 SPRING
4 8M0026455 SEAL
5 835256T ROLLER
6 23-852987T BUSHING
7 826414T WASHER
8 10-82684430 SCREW, (M6 x 30)
9 13-826229 LOCKWASHER
10 24-86857T01 SPRING
11 50-854317T5 SHEAVE ASSEMBLY, Starter
12 868501 CAM
13 24-86851T02 SPRING
14 53-86849T01 RING, Retaining
15 24-868523 SPRING
16 86853T01 CAM
17 10-826253 SCREW, (.250-20 x .625)
18 50-12066Q10 ROPE
19 856073 LEVER, Interlock
20 856072T RETAINER
21 24-856138T03 SPRING
22 854779T BUSHING
23 10-8182491 SCREW, (#10-16 x 1.00)
24 85174A1 HANDLE ASSEMBLY
25 NSS NOT SOLD SEPARATE, Retainer
26 10-8248326 SCREW, (M6 x 25 MM)
27 856754003 CABLE, Interlock (Included with complete Recoil Starter Assembly)
28 10-40011107 SCREW, (M5 x 16) Stainless Steel (Included with complete Recoil Starter Assembly)
29 12-73288 WASHER, (.220 x .500 x .030) Stainless Steel
30 18-26811 COTTER PIN
31 10-40011107 SCREW, (M5 x 16) Stainless Steel
32 37-804654A06 DECAL, EPA Label Information
Manual Tilt (15 parts) Manual Tilt
Ref OEM Part # Part Name
- 25-893922A01 O-RING KIT
1 8M0118572 SHOCK ROD ASSEMBLY
2 893903A01 PISTON ASSEMBLY, Trim Memory
3 25-893917A01 O-RING KIT, Cylinder
4 NSS NOT SOLD SEPARATE, O Ring
5 893918A01 CYLINDER ASSEMBLY
6 893919A01 SCREW AND SEAL KIT
7 893920A01 ACCUMULATOR ASSEMBLY
8 893921A01 VALVE BODY ASSEMBLY
9 893923A01 CAM KIT
10 893924A01 VALVE KIT, Velocity
11 893925A01 REPAIR KIT
12 8M0207768 CABLE ASSEMBLY, Ground
13 17-19607 PIN
14 17-821539 PIN, Trilobe
Powerhead Gasket Set Components (2 parts) Powerhead Gasket Set Components
Ref OEM Part # Part Name
- 27-825231A02 GASKET SET, Engine
0 8M0151048 SEAL, Crankshaft-Bottom
Service/Support Material (1 parts) Service/Support Material
Ref OEM Part # Part Name
- 37-804654A06 DECAL, EPA Label Information
Steering Arm (17 parts) Steering Arm
Ref OEM Part # Part Name
1 11-896963 NUT, (M12)
2 893773002 STRAP, Upper Mount
3 8M0224385 MOUNT, Upper
4 10-8M0204741 SCREW, (M6 x 20) Stainless Steel
5 8M0156878 BUMPER
6 53-89531 RING, Retaining
7 8M0118183 ARM, Steering
8 10-898835001 BOLT, (M12 x 154)
9 23-8279971 SPACER Comment: (Long)
10 893590T01 SWIVEL TUBE Comment: (Long)
11 84-88238T01 CABLE ASSEMBLY, Steering Arm to Driveshaft Housing
12 8M0207768 CABLE ASSEMBLY, Ground, Steering Arm to Swivel Bracket
13 10-823567105 SCREW, (M10 x 105) Hex Flange - Stainless Steel
14 893703 BRACKET
15 10-878607 SCREW, (#10-16 x .375)
16 11-40140 NUT, (M10)
17 12-45176 WASHER, (.453 x .812 x .105) Stainless Steel
Swivel Bracket (17 parts) Swivel Bracket
Ref OEM Part # Part Name
1 1401-850066T01 SWIVEL BRACKET
2 23-19606 BEARING, Trim Pin
3 22-8M0169589 FITTING, Grease
4 37-8237011 DECAL, Co-Pilot
5 NSS NOT SOLD SEPARATE, Decal-Serial Overlaminate
6 23-821777 BUSHING (Lower)
7 26-8M0205512 SEAL, Lower
8 10-4008910 SCREW, (M8 x 10) Stainless Steel
9 23-8217711 BUSHING, Upper
10 11-8M0204726 NUT, (.375-24) Stainless Steel
11 823792 LEVER, Co-Pilot
12 12-29330 WASHER
13 821961 ROD, Co-Pilot (Threaded)
14 8M0006845 PLATE/DISC ASSEMBLY
15 8M0007471 PLATE
16 8165621 DISC, Friction
17 10-768042 SHOULDER SCREW, Hex
Tiller Handle (43 parts) Tiller Handle
Ref OEM Part # Part Name
- 37-8M0032728 DECAL, Lanyard, Black
1 822148T06 COVER KIT
2 822150 PULLEY
3 NSS NOT SOLD SEPARATE, Case
4 10-878608 SCREW, (#10-16 x .500)
5 4324210 CABLE ASSEMBLY, Throttle (30.50 Inches)
6 4324211 CABLE ASSEMBLY, Throttle (41.50 Inches)
7 85-960099 SLEEVE, (12.00 Inches)
8 10-82526225 SCREW, (M8 x 25 MM)
9 8M0072298 COVER
10 23-821477 BUSHING
11 828813T1 ARM, Steering Handle
12 822441 RETAINER
13 10-40011107 SCREW, (M5 x 16) Stainless Steel
14 10-8M0204707 SCREW, (M6 x 25)
15 892995 LOCK, Throttle
16 24-96203 SPRING
17 821972T KNOB, Throttle
18 8M0138696 TILLER TUBE
19 37-8242004 DECAL
20 821465 HANDLE, Throttle
21 8M0221732 GRIP
22 87-8M0104614 SWITCH, Stop
23 10-82239312 SCREW, (M5 x 12)
24 12-8M0214930 WASHER
25 84-8M0088388 ALARM
26 823687 CLIP
27 87-11083A31 SWITCH, Stop
28 8M0032846 RETAINER, Brass
29 821455A4 BRACKET, Tiller
30 13-826792 WAVE WASHER
31 23-821477 BUSHING
32 12-827314 WASHER
33 32-828547633 CONDUIT, (.620 Inside Diameter x 3.00 Feet Bulk)
34 54-816311T TIE STRAP, (8.00 Inches)
35 37-82409316 DECAL, F-N-R Shift
36 15920Q54 LANYARD ASSEMBLY
37 10-40011151 SCREW, (M8 x 35) Stainless Steel
38 830180A01 HANDLE
39 23-830181 BUSHING
40 8301821 SHIFT ROD (Short)
41 14-8M0009820 TAB WASHER
42 10-82484890 SCREW, (M10 x 90)
Tools 1 (23 parts) Tools 1
Ref OEM Part # Part Name
1 44357Q2 FLUSHING ATTACHMENT
2 802889Q1 PUMP, Crankcase Oil
3 91-802653Q02 WRENCH, Oil Filter
4 91-8M0161873 HOLDER TOOL, Flywheel
5 91-83164M FLYWHEEL PULLER
6 91-99379 TIMING LIGHT
7 91-890451 ADAPTOR TOOL, Direct Voltage
8 91-892647A01 MULTI-METER KIT, DMT 2004
9 91-823686A2 DIGITAL DIAGNOSTIC TESTER
10 91-8226086 CARTRIDGE
11 84-822560A7 HARNESS ASSEMBLY, Adaptor
12 84-822560A10 HARNESS ASSEMBLY, Adaptor
13 91-36392 GAUGE TOOL, Carburetor
14 91-809495001 REMOVER TOOL, Valve Guide
15 91-809496A1 INSTALLER TOOL, Valve Guide Bushing
16 91-809497A1 REAMER TOOL, Valve Guide
17 91-809494A1 COMPRESSOR TOOL, Valve Spring
18 NSS NOT SOLD SEPARATE, Valve Seat cutter Kit Comment: (OBTAIN LOCALLY)
19 FT2997 COMPRESSOR TOOL, Piston Ring
20 91-827001A1 STAND TOOL, Powerhead
21 91-24697 EXPANDER TOOL, Piston Ring
22 91-74951 SPANNER WRENCH
23 91-822778A3 DOWN PRESSURE KIT
Tools 2 (29 parts) Tools 2
Ref OEM Part # Part Name
- 91-31229A7 PULLER KIT, Bearing
24 91-63209 HEAT LAMP
25 31-85560 BEARING, Thrust
26 91-13779 REMOVER TOOL, Bearing
27 NSS NOT SOLD SEPARATE, Expanding rod (P/N-CG-41-11)
28 NSS NOT SOLD SEPARATE, Collet (P/N-CG-41-14)
29 11-24156 NUT, (.625-18)
30 12-34961 WASHER
31 91-29310 PLATE
32 91-31229 SHAFT
33 91-36571T WRENCH TOOL, Driveshaft Bearing
34 91-37323 DRIVER ROD TOOL, Needle Bearings
35 91-15755T MANDREL
36 91-36569T DRIVE HEAD TOOL
37 91-27780 PULLER
38 91-37241 PULLER PLATE
39 91-37312T DRIVER HEAD TOOL
40 91-817011T INSTALLER TOOL, Needle Bearing
41 91-83180M HOLDING TOOL, Driveshaft
42 91-825197T INSTALLER TOOL, Oil Seal
43 91-817007T INSTALLER TOOL, Seal
44 91-825198 MANDREL
45 91-825199 PILOT
46 91-825200A1 HOOK TOOL, Spring
47 91-826872 INSTALLER TOOL, Bearing
48 FT8950 TESTER KIT
49 91-12349A05 TOOL, Pinion Locating
50 91-13945 INSTALLATION TOOL, Bearing
51 91-13949 DRIVER TOOL, Oil Seal
Tools 3 (17 parts) Tools 3
Ref OEM Part # Part Name
- 91-8M0162977 TOOL KIT (Included with Engine)(Includes Spark Plug Wrench)
52 91-14308T02 TOOL KIT, Bearing Race
53 91-14309T02 INSTALLATION TOOL, Bearing
54 91-14310T1 WEAR SLEEVE INSTALLATION TOOL
55 91-14311A04 TOOL, Preload
56 91-8M0053505 INDICATOR TOOL, Backlash
57 91-31106T MANDREL, Bearing Driver Cup
58 91-31108T DRIVER, Oil Seal
59 91-34569A1 PULLER ASSEMBLY, Slide Hammer
60 91-46086A1 PULLER JAW ASSEMBLY
61 91-37350T MANDREL
62 91-56775T HOLDING TOOL, Driveshaft
63 91-58222A1 DIAL INDICATOR TOOL
64 91-85716 PULLER TOOL
65 91-83155 ADAPTER KIT, Dial Indicator
66 91-83165T PULLER ASSEMBLY
67 91-856875A1 INSTALLATION TOOL, Bearing
Top Cowl (18 parts) Top Cowl
Ref OEM Part # Part Name
- 37-803643A03 DECAL SET Comment: (Mariner)
1 102-834785T6 TOP COWL ASSEMBLY Comment: (Silver)
2 NSS NOT SOLD SEPARATE, Induction Insert
3 826291F1 LATCH Comment: (Silver)
4 10-8231871 SCREW, (M4 x 14.5)
5 8,13-26995 LOCKWASHER, Stainless Steel
6 11-8237515 NUT, (M4)
7 8M0153618 SEAL
8 834786A04 SOUND BLANKET KIT
9 NSS NOT SOLD SEPARATE, Sound Blanket-Top
10 893763 BRACKET ASSEMBLY, Latch Roller
11 10-4006731 SCREW, (M6 x 16)
12 8M0038412 BRACKET
13 10-8231871 SCREW, (M4 x 14.5)
14 8,13-26995 LOCKWASHER, Stainless Steel
15 11-8237515 NUT, (M4)
16 47341A11 ROPE AND HANDLE KIT, Manual Starting
17 854318 INSERT, Cowl
Transom Bracket (37 parts) Transom Bracket
Ref OEM Part # Part Name
1 3418-822866T04 BRACKET, Transom - Port
2 22-8M0169588 FITTING, Grease
3 17-99604 PIN, Groove
4 3418-822865T05 BRACKET, Transom - Starboard
5 893704T01 LEVER ASSEMBLY, Tilt Lock
6 24-99622 SPRING
7 23-65830 NYLINER
8 24-812708 SPRING
9 812709 KNOB
10 17-99615 PIN, Groove
11 12-19619 WASHER
12 18486A08 BRACKET KIT, Anchor Comment: SN# 1B270275 & Up
13 97-818298Q1 ANODE KIT
14 10-8M0204707 SCREW, (M6 x 25)
15 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
16 10-85594030 SCREW, (M8 x 30) Comment: (Included with Anchor Bracket Kit) SN# 1B270275 & Up
17 10-8M0000586 SCREW, (M8 x 35) Comment: (Included with Anchor Bracket Kit) SN# 1B270275 & Up
18 12-843108 WASHER, (.330 x .560 x .060) Stainless Steel Comment: (Included with Anchor Bracket Kit) SN# 1B270275 & Up
19 11-401388 NUT, (M8) Stainless Steel
20 17-8M0026068 PIN ASSEMBLY, Tilt Lock
21 24-821461 SPRING
22 8M0041938 TILT TUBE
23 11-858869 NUT, (.875-14)
24 10-814259 SCREW, (.500-20 x 4.00)
25 12-8M0204648 WASHER, (1.5 x 3.05 x 0.13) Stainless Steel
26 11-82671117 NUT, (.500-20)
27 8M0084737 LINK
28 19615A05 LEVER ASSEMBLY, Tilt
29 23-812707 BUSHING
30 12-8M0042643 WASHER, (.520 x .850 x .060) Nylon - Black
31 13-99611 WAVE WASHER
32 8M0007469 TILT KNOB
33 10-19611 SCREW, (.375-16 x .62)
34 10-4009040 SCREW, (M10 x 40) Stainless Steel
35 12-4002319 WASHER
36 11-40140 NUT, (M10)
37 37-830253 DECAL, Tilt Lock
Trim Swith Kit (8 parts) Trim Swith Kit
Ref OEM Part # Part Name
- 87-18286A18 SWITCH KIT, Trim (10.00 Feet)
1 18861 RETAINER
2 814820 ADAPTOR
3 NSS NOT SOLD SEPARATE, Switch
4 88-8M0207796 FUSE, 20 Ampere
5 84-95084A2 CABLE ASSEMBLY
6 84-11149A2 CABLE ASSEMBLY, (6.00 Inches)
7 10-813523 SCREW, (#10-16 x 2.25)

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 40 CARB (3 CYL.)(4-STROKE) running reliably season after season. Most of these tasks can be performed with basic tools and the factory service manual.

  1. Replace water pump impeller and inspect wear plate
  2. Change engine oil and oil filter (check drain plug washer)
  3. Replace spark plugs and check ignition timing
  4. Drain and refill lower unit gear oil; inspect for water contamination
  5. Inspect fuel lines, primer bulb, and fuel filter for deterioration
  6. Check and replace sacrificial anodes (zinc or aluminum)
  7. Inspect propeller for damage; check shaft seal and cotter pin
  8. Check valve clearance (refer to service manual for specifications)
  9. Lubricate all grease points (steering, tilt tube, shift linkage)
  10. 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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