Mercury 2 (0T884302 THRU 0T894576) Parts & Diagrams

OEM and aftermarket replacement parts for Mercury 2. Scroll down for exploded parts diagrams (13), specifications, and maintenance reference.

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Water Pump Impeller – Fits Tohatsu/Nissan 2.5 - 6 HP (Replaces 369 - 65021 - 1) - JLM Marine Boat Parts Limited
47-16154-3 Outboard Rubber Impeller with Key/Pin for Mercury Mariner 4-S 2 2.5 3.5 | JLM Marine
$21.00
$21.00
files/Water_Pump_Impeller_for_Tohatsu_Nissan_25-6_HP_18-3098_-_JLM_MARINE-8288311.jpgDefault Title
$21.00
17-95372 18-95295 12-8035161 26-95348 25-16131 27-95220 Prop Shaft Seal Kit with Shear Pin for Mercury Mariner 2.5HP 3.3HP | JLM Marine
17-95372 18-95295 12-8035161 26-95348 25-16131 27-95220 Prop Shaft Seal Kit with Shear Pin for Mercury Mariner 2.5HP 3.3HP | JLM Marine
$20.50
$20.50
files/12_f0dab45b-421b-4acb-8162-3f3be09b8964.jpgDefault Title
$20.50
309-65021-2 47-95289-2 47-114812 Water Pump Impeller for Tohatsu Nissan Mercury Mariner 2.5A 3.5A 3.5B | JLM Marine
309-65021-2 47-95289-2 47-114812 Water Pump Impeller for Tohatsu Nissan Mercury Mariner 2.5A 3.5A 3.5B | JLM Marine
$9.99
$9.99
files/12_464a2c48-d6fc-406f-94cb-e43ed89bfa85.jpgDefault Title
$9.99

Mercury 2 (0T884302 THRU 0T894576) Parts & Diagrams

🔎 Mercury 2 Reference Library — Exploded parts diagrams (13 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 2 is a 2-Stroke, 1-Cylinder outboard motor. Designed for dinghies, inflatable boats, and small tenders where lightweight portability is essential.

Quick Reference Specifications

Specification Value
Engine Type 2-Stroke, 1-Cylinder
Horsepower 2 HP
Displacement 74.6 cc
Bore x Stroke 47 mm x 43 mm
Spark Plug (Type & Gap) NGK BM6A
Engine Oil Capacity Pre-mix (50:1)
Recommended Engine Oil Quicksilver Premium Plus 2-Cycle TC-W3
Gear Case Oil Capacity —
Idle Speed (in gear) —
Full Throttle RPM Range 4500-5500
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 2:

  • 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 2.

▶CD Ignition (17 parts) CD Ignition
Ref OEM Part # Part Name
- 262-822899A1 FLYWHEEL MAGNETO ASSEMBLY
1 262-822899 FLYWHEEL
2 823030T1 EXCITER COIL
3 10-16059 SCREW
4 11-95233 NUT
5 10-823031 SCREW
6 823033 IGNITION COIL
7 10-16705 BOLT
8 823034T CD UNIT
9 12-953921 WASHER
10 10-16832 BOLT, (M6 x 16)
11 12-953921 WASHER
12 33-19796 SPARK PLUG Comment: (NGK#BPR6HS-10)(With Resistance)
13 85-855543 PLUG CAP
14 87-823037A04 EMERGENCY STOP SWITCH ASSEMBLY Comment: SN# USA-0T879555/BEL-0P325500 & Up
15 823054 LANYARD
16 54-160601 CLAMP
▶Carburetor (43 parts) Carburetor
Ref OEM Part # Part Name
- 8M0171816 REPAIR KIT, Carburetor
1 1300-8M0203718 CARBURETOR ASSEMBLY Comment: (3.3 HP)
2 95252 THROTTLE WIRE
3 10-95321 BOLT
4 95253 BRACKET
5 95254 CAP
6 24-95322 SPRING
7 95255 PLATE
8 53-95323 E-RING
9 8151263 JET NEEDLE
10 952572 THROTTLE VALVE Comment: (3.3 HP)
11 8151081 NEEDLE JET
12 27-95324 GASKET
13 95259 FLOAT
14 95260 FLOAT BOWL
15 952621 HINGE
16 17-95327 HINGE PIN
17 86,8150293 MAIN JET
18 10-953251 DRAIN SCREW
19 27-95326 GASKET
20 952631 NEEDLE VALVE
21 8M0171808 SEAT-NEEDLE VALVE
22 10-95328 SCREW
23 24-95329 SPRING
24 95266 SHUTTER LEVER
25 10-95331 SCREW
26 95265 CHOKE PLATE
27 13-400256 LOCKWASHER, (M6)
28 11-95330 NUT
29 54-95332 CLAMP
30 10-95333 SCREW
31 25-811601 O-RING
32 10-815071 SCREW
33 95268 THROTTLE LEVER
34 10-815072 SCREW
35 13-95238 LOCKWASHER
36 27-95336 GASKET
37 952672 BRACKET
38 23-952867 COLLAR
39 95269 KNOB
40 10-95338 SCREW
41 815073 COVER Comment: (3.3 HP)
42 10-95339 SCREW
▶Cowl and Fuel Tank (28 parts) Cowl and Fuel Tank
Ref OEM Part # Part Name
1 2189-815098A4 TOP COWL Comment: (Silver)
2 2189-824926A1 BOTTOM COWL (Port)
3 100-8M0145391 BOTTOM COWL (Starboard)
4 8M0114258 LATCH KIT
5 17-825829 RIVET
6 10-16827 SCREW
7 8M0148363 COVER
8 815105 REAR HINGE
9 10-95386 BOLT
10 95280 PLATE
11 11-95385 NUT
12 25-95387 GROMMET
13 1258-824963A03 FUEL TANK
14 36-8M0060029 CAP
15 27-8M0065762 GASKET
16 25-815109 SEAL
17 10-803858 BOLT
18 13-16818 LOCKWASHER
19 12-95392 WASHER
20 23-95390 SPACER
21 22-95393 VALVE
22 32-8M0057113 FUEL LINE
23 54-95395 CLIP
24 91-95399 TOOL KIT
25 17-815111Q02 PIN
26 18-95295 COTTER PIN
27 37-804660A05 DECAL, EPA Information Comment: (2005)
28 37-8240857 DECAL, Fuel Lever
▶Crankshaft and Piston (19 parts) Crankshaft and Piston
Ref OEM Part # Part Name
- 27-8M0203727 GASKET SET, Powerhead Comment: (3.3 HP)
1 474-822892T02 CRANKSHAFT ASSEMBLY Comment: (3.3 HP)
2 NSS Not Sold Separate, Crankshaft
3 NSS Not Sold Separate, Crankshaft
4 629-813269 CONNECTING ROD
5 31-813270 BEARING
6 813271001 CRANK PIN
7 31-95227 ROLLER BEARING
8 28-95229 KEY
9 30-898101936 BALL BEARING
10 95230 PLATE
11 26-95232 OIL SEAL
12 30-822894 BALL BEARING Comment: (3.3 HP)
13 26-822897 OIL SEAL Comment: (3.3 HP)
14 822896 LOWER THRUST PLATE
15 779-9183 PISTON Comment: (.5MM Oversize)(Bare Piston)
16 39-95309 PISTON RING Comment: (.5MM Oversize)
17 898101917 PISTON PIN
18 53-952366 CLIP
▶Cylinder Block (20 parts) Cylinder Block
Ref OEM Part # Part Name
- 27-8M0203727 GASKET SET, Powerhead Comment: (3.3 HP)
1 878-8228871 CYLINDER BLOCK/CRANKCASE Comment: (3.3 HP)
2 17-16119 DOWEL PIN
3 10-898103167 SCREW
4 10-95298 BOLT
5 22-8M0064617 CONNECTOR
6 32-8M0057112 DRAIN HOSE
7 27-95299001 GASKET
8 979-815062T2 CYLINDER HEAD
9 10-815063 SCREW
10 12-809931044 WASHER
11 34-95226 REED VALVE
12 34-95304 STOP
13 10-16067 SCREW
14 54-813275 CLAMP
15 27-822889 GASKET (3.3 HP)
16 26-822891 OIL SEAL (3.3 HP)
17 900-8M0091645 HEAD (3.3 HP)
18 10-82304231 BOLT
19 952251 HEAD Comment: (2.5 HP)
▶Driveshaft Housing and Clamp Brackets (44 parts) Driveshaft Housing and Clamp Brackets
Ref OEM Part # Part Name
- 27-8M0203727 GASKET SET, Powerhead Comment: (3.3 HP)
1 1599-825128A1 DRIVESHAFT HOUSING Comment: (3.3 HP)
2 27-95220 GASKET
3 19-879194296 FLUSH PLUG
4 27-815076002 GASKET
5 17-16119 DOWEL PIN
6 823164 CARRYING HANDLE Comment: (3.3 HP)
7 10-8M0204707 SCREW, (M6 x 25)
8 11-400212 NUT, (M6)
9 25-16117 GROMMET (3.3 HP)
10 10-82304227 BOLT Comment: (2.5 HP)
11 10-823042 BOLT
12 95274 GRIP
13 823162A3 STEERING HANDLE
14 10-40011151 SCREW, (M8 x 35)
15 22-95364 DAMPER
16 3406-8150852 CLAMP BRACKET
17 10-898101337 BOLT
18 12-95375 WASHER
19 11-95374 NUT, (M8)
20 95278 BRACKET
21 8M0055576 DISTANCE ROD
22 13-400256 LOCKWASHER, (M6)
23 11-400212 NUT, (M6)
24 10-16200 CLAMP SCREW ASSEMBLY
25 12-95379 PAD
26 3407-9160T1 SWIVEL BRACKET
27 3407-8112041 SWIVEL BRACKET
28 10-16830 BOLT
29 23-95381 BUSHING
30 10-162061 ADJUSTING SCREW
31 24-953838 SPRING
32 952791 FRICTION PAD
33 12-16826 WASHER
34 8150921 THRUST ROD (Design II)
35 24-8150931 SPRING
36 8M0058619 TILT STOPPER
37 815096 KNOB
38 823826T03 EXTENSION HOUSING (3.3 HP)
39 23-811214 BUSHING (3.3 HP)
40 16-8230441 STUD (3.3 HP)
41 11-400212 NUT, (M6) (3.3 HP)
42 10-82304232 BOLT (3.3 HP)
43 815092 THRUST ROD (Design I)
▶Engine Gasket Set Components (1 parts) Engine Gasket Set Components
Ref OEM Part # Part Name
- 27-815076002 GASKET, Driveshaft Housing
▶Gear Housing Assembly(2/2.5 HP) (33 parts) Gear Housing Assembly(2/2.5 HP)
Ref OEM Part # Part Name
- 27-8M0082878 GASKET SET, Lower Unit
1 1668-825122T1 GEAR HOUSING, Basic
2 30-95342 BALL BEARING, Lower
3 23-95343 SPACER
4 30-95344 BALL BEARING, Upper
5 53-95345 SNAP RING
6 97-823913Q ANODE
7 10-16832 BOLT, (M6 x 16)
8 22-8M0229353 OIL PLUG
9 27-95220 GASKET
10 30-95347 BEARING
11 30-95344 BALL BEARING
12 26-95348 OIL SEAL
13 46-952871 WATER PUMP
14 25-95288 O-RING
15 47-952892 IMPELLER
16 825114 COVER
17 10-167051 BOLT, (M6 x 20)
18 26-95350 OIL SEAL
19 23-95361 BUSHING, Lower
20 44-95291A1 PROPELLER SHAFT (With Bevel Gear)
21 15-811647A1 SHIM
22 43-95293 PINION GEAR
23 53-815066 SNAP RING
24 28-95371 KEY
25 32-953593 WATER TUBE ASSEMBLY Comment: (Long)
26 25-953601 GROMMET, Upper
27 45-952903 DRIVESHAFT (Upper) Comment: (Long)
28 45-95369 DRIVESHAFT, Lower
29 952772 PIPE Comment: (Long)
30 17-815111Q02 PIN Comment: (Plastic Propeller)
31 48-815083A02 PROPELLER Comment: (Plastic - 7)
32 18-95295 COTTER PIN
▶Gear Housing Assembly(3.3 HP) (47 parts) Gear Housing Assembly(3.3 HP)
Ref OEM Part # Part Name
- 8M0080264 REPAIR KIT, Water Pump
1 1668-825126T06 GEAR HOUSING, Basic
2 30-95342 BALL BEARING (Lower)
3 10-82304232 BOLT
4 22-8M0229353 OIL PLUG
5 27-95220 GASKET
6 10-16832 BOLT, (M6 x 16)
7 97-823913Q ANODE
8 43-16138 GEAR
9 23-8104711 SPACER
10 45-8M0227907 DRIVESHAFT Comment: (Long)
11 30-95342 BALL BEARING
12 28-16155 KEY
13 27-898101333 GASKET
14 26-161621 SEAL, Oil
15 46-815113T03 PUMP HOUSING
16 17-9521811 ROLL PIN
17 27-161603 GASKET
18 161591 GUIDE PLATE
19 27-898101331 GASKET
20 47-8M0204676 IMPELLER
21 161571 LINER
22 46-161561 HOUSING
23 25-161771 O-RING
24 25-161781 O-RING
25 23-161761 BUSHING
26 25-953611 GROMMET
27 10-8M0063198 BOLT
28 12-16826 WASHER
29 13-400256 LOCKWASHER, (M6)
30 32-953592 WATER TUBE Comment: (Long)
31 25-953601 GROMMET
32 30-16128 BEARING, Ball
33 15-813277 SHIM Comment: (0.15)
34 43-812944 GEAR
35 823050 PUSH ROD
36 24-176671 SPRING
37 44-952911 PROP SHAFT
38 52-823049 CLUTCH
39 30-95344 BALL BEARING
40 26-95348 OIL SEAL
41 25-16131 O-RING
42 825116 HOUSING
43 10-167051 BOLT, (M6 x 20)
44 48-815084A02 PROPELLER Comment: (Aluminum)
45 17-815111Q02 SHEAR PIN Comment: (Aluminum Ppropeller)
46 18-95295 COTTER PIN
▶Recoil Starter (17 parts) Recoil Starter
Ref OEM Part # Part Name
1 8M0109575 RECOIL STARTER ASSEMBLY
2 815067 STARTER HOUSING
3 24-95284 SPRING
4 95245 STARTER SHEAVE
5 95246 RATCHET
6 24-95315 SPRING
7 95247 COVER
8 24-95316 SPRING
9 95248 FRICTION PLATE
10 12-95317 THRUST WASHER
11 53-95318 E-RING
12 50-12066Q10 STARTER ROPE
13 95249 STARTER HANDLE
14 823039 PULLEY
15 10-16828 BOLT
16 10-815068 BOLT
17 95251 PLUG
▶Service/Support Material (1 parts) Service/Support Material
Ref OEM Part # Part Name
- 16841Q02 FLUSHING ATTACHMENT
▶Shift Linkage(3.3 HP) (19 parts) Shift Linkage(3.3 HP)
Ref OEM Part # Part Name
1 8130272 SHIFT LEVER
2 25-161811 O-RING
3 30-812937 STOPPER
4 24-813028 SPRING
5 161841 SHIFT ROD LEVER
6 10-161851 SCREW
7 823052 COVER
8 27-823053 GASKET
9 10-16832 BOLT, (M6 x 16)
10 11-400212 NUT, (M6)
11 161721 CLUTCH CAM
12 161741 CAM ROD Comment: (Long)
13 17-161791 PIN
14 16190 JOINT (Set)
15 161861 SHIFT ROD
16 10-8248324 BOLT
17 12-16335 WASHER
18 12-8M0108373 WASHER
19 18-8150261 COTTER PIN
▶Tools (1 parts) Tools
Ref OEM Part # Part Name
0 91-37241 PULLER PLATE

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 2 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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