Mercury 225 PRO XS (3.0L DFI) (1B104549 THRU 1B426560) Parts & Diagrams

OEM and aftermarket replacement parts for Mercury 225 PRO XS (3.0L DFI). Scroll down for exploded parts diagrams (29), specifications, and maintenance reference.

Mercury 225 PRO XS (3.0L DFI) (1B104549 THRU 1B426560) Parts & Diagrams

🔎 Mercury 225 PRO XS (3.0L DFI) Reference Library — Exploded parts diagrams (29 diagrams), specifications, common issues, and maintenance checklist.

The Mercury 225 PRO XS (3.0L DFI) is a 4-Stroke, V6 64-degree, DOHC, 24-valve outboard motor. Designed for large center-consoles, offshore sport-fishing boats, and multi-engine configurations.

Quick Reference Specifications

Specification Value
Engine Type 4-Stroke, V6 64-degree, DOHC, 24-valve
Horsepower 225 HP
Displacement 3400 cc (3.4L / 209 CID)
Bore x Stroke 92 mm x 86 mm (3.6 in. x 3.4 in.)
Spark Plug (Type & Gap) NGK LKAR7C-9
Engine Oil Capacity 6.6 L (7.0 qt)
Recommended Engine Oil Mercury FourStroke Oil 25W-40
Gear Case Oil Capacity 710 mL (24.0 oz)
Idle Speed (in gear) 600 ± 50 RPM (in gear)
Full Throttle RPM Range 5200-6000
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 225 PRO XS (3.0L DFI):

  • 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 225 PRO XS (3.0L DFI).

Accessories (1 parts) Accessories
Ref OEM Part # Part Name
- 841970T01 UPDATE KIT, Solid Mount
Air Compressor Components (30 parts) Air Compressor Components
Ref OEM Part # Part Name
- 25-832804A03 O-RING KIT
1 8M0060051 COMPRESSOR ASSEMBLY, Air
2 1100-8M0050793 END CAP ASSEMBLY
3 NSS NOT SOLD SEPARATE, Snap Ring
4 10-82130020 SCREW, (M6 x 20)
5 25-89224001 O-RING
6 25-67206001 O-RING
7 653-833146T06 CONNECTING ROD ASSEMBLY
8 NSS NOT SOLD SEPARATE, Piston Assembly
9 53-8348101 RING, Lock
10 835088A10 REED PLATE ASSEMBLY
11 25-67207 O-RING, (3.489 x .070)
12 25-832804 O-RING, (2.739 x .070)
13 26-828225 SEAL
14 835087A3 HEAD ASSEMBLY, Compressor
15 22-8307535 FITTING, Straight
16 10-82127335 SCREW, (M8 x 35 MM)
17 22-151331 FITTING
18 22-996642 FITTING, Elbow 90 Degree (.125-27 x .250) Nylon
19 21-428641 FITTING, Check Valve
20 22-856744 FITTING
21 22-16604 FITTING, Straight (.125-27)
22 25-831985 O-RING, (.468 x .078)
23 13536A14 SENSOR ASSEMBLY, Temperature
24 137151 RETAINER
25 10-81893414 SCREW, (M8 x 14)
26 22-390721 PLUG, Pipe (.125-27) Brass
27 10-85593912 SCREW, (M6 x 12)
28 8M0175171 PULLEY
29 10-8M0045380 SCREW, (M8 x 50) Comment: SN# 1B227000 & Up
Air Handler (44 parts) Air Handler
Ref OEM Part # Part Name
- 27-841220A03 GASKET SET, Powerhead
1 858541T4 ADAPTOR PLATE
2 27-841220 GASKET
3 840418T04 REED BLOCK ASSEMBLY
4 34-840445A04 REED PETAL KIT
5 10-849038 SCREW, (M3 x 5)
6 840447 REED PLATE
7 10-8555252 SCREW, (M6)
8 23-855364 BUSHING
9 25-855362001 GROMMET
10 12-817274 WASHER, (.344 x 1.00 x .063) Stainless Steel
11 10-81893430 SCREW, (M8 x 30)
12 858708T1 PLENUM KIT, Air
13 27-804679004 GASKET
14 10-883942 SCREW, (M4 x 16)
15 854445 SENSOR, MAP
16 884522 BRACKET, MAP Sensor
17 8M0148668 SENSOR ASSEMBLY
18 25-896699 O-RING, (.351 x .072)
19 841194T2 THROTTLE BODY KIT
20 10-82130040 SCREW, (M6 x 40)
21 25-855426 O-RING
22 8M0185614 PUMP ASSEMBLY, Oil
23 54-804842 CLAMP
24 10-1993716 SCREW, (M6 x 16)
25 858851A03 LEVER ASSEMBLY, Throttle
26 8M0072162 ROLLER
27 12-8M0204666 WASHER, (.203 x .500 x .032)
28 8-32,11-826709104 NUT, Stainless Steel
29 10-889354 SCREW, Special
30 12-881991 WASHER, Cupped
31 12-881992 WASHER, Spool
32 10,13-69432 LOCKWASHER, External
33 54-816311T TIE STRAP, (8.00 Inches)
34 10-82130040 SCREW, (M6 x 40)
35 8M0111168 COVER
36 25-86361 GROMMET
37 25-13467 GROMMET, (.88 Inside Diameter)
38 25-8M0153609 GROMMET
39 37-881865 DECAL, Caution-Start in Gear Comment: (Start In Gear)
40 854343T11 ATTENUATOR, Air
41 10-82130045 SCREW, (M6 x 45)
42 12-69056 WASHER, (.255 x .620 x .030) Stainless Steel
43 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
Air Hoses (11 parts) Air Hoses
Ref OEM Part # Part Name
- 61-843034A07 POWERHEAD ASSEMBLY
1 22-856842 ELBOW
2 54-816311T TIE STRAP, (8.00 Inches)
3 32-8M0108349 TUBING, (.312) (70.00 Inches Bulk) (Cut to 8 Inches)
4 54-8M0214964 CLAMP, Hose (15.3)
5 32-8567631 HOSE ASSEMBLY
6 32-889314 HOSE, Air By-Pass
7 32-804829 HOSE ASSEMBLY, Air Balance
8 32-8M0116380 HOSE/SLEEVE
9 22-875271 FITTING, 90 Degree - Brass (.125-27)
10 32-887630 HOSE, Molded
Bottom Cowl (25 parts) Bottom Cowl
Ref OEM Part # Part Name
1 100-8M0107324 BOTTOM COWL, Port Comment: SN# 1B227000 & Up
2 854367001 PLUG
3 100-8M0107323 BOTTOM COWL, Starboard Comment: SN# 1B227000 & Up
4 8M0043268 SEAL, Cowl
5 10-82130040 SCREW, (M6 x 40)
6 10-824868 SCREW, (M6 x 75)
7 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
8 8M0053903 FRONT HANDLE
9 23-335891 BUSHING
10 25-48462 O-RING, (.614 x .070)
11 8219423 PAWL
12 12-69057 WASHER, (.281 x .734 x .063)
13 11-401366 NUT, (M6) Stainless Steel
14 10-8214281 SCREW, (#10-16 x .625)
15 54-822873 CLIP
16 87-8M0235191 SWITCH, Trim Comment: SN# 1B227000 & Up
17 32-842756T01 RIGGING KIT
18 842744002 BRACKET
19 10-82130012 SCREW, (M6 x 12)
20 843185T02 COUPLER
21 32-842756005 HOSE
22 843174002 COUPLER, Rigging
23 10-47994 SCREW, (#10 x 1.50)
24 852361T1 HANDLE, Cowl
25 13-29402 WAVE WASHER
Coil Plate (29 parts) Coil Plate
Ref OEM Part # Part Name
- NSS NOT SOLD SEPARATE, Plate Assembly-Coil Mounting
1 850295T4 PLATE
2 339-856991A1 COIL KIT
3 10-82129130 SCREW, (M6 x 30)
4 84-881908T CABLE SET
5 859595T DRIVER, Dual Coil
6 84-858414A1 CABLE ASSEMBLY, Braided
7 10-82129110 SCREW, (M6 x 10)
8 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
9 25-833155 GROMMET
10 23-8502341 BUSHING
11 71-8M0157742 SENSOR KIT, (0-50 PSI)
12 22-8M0207782 FITTING
13 54-883066 CLIP, (.865)
14 32-85978571 TUBING, (52.00 Inches Bulk) (Cut to 18 Inches)
15 84-892972T01 HARNESS ASSEMBLY, Coil
16 54-859671 TIE STRAP, (8.00 Inches)
17 33-843220Q SPARK PLUG
18 10-81893435 SCREW, (M8 x 35)
19 12-4002318 WASHER
20 22-881866 FITTING
21 22-875207 TEE, Fitting
22 32-85978571 TUBING, (52.00 Inches Bulk) (Cut to 44 Inches)
23 22-8M0214971 COUPLER
24 22-859732 PLUG
25 32-85978571 TUBING, (52.00 Inches Bulk) (Cut to 5 Inches)
26 54-879962 CLIP
27 10-82129114 SCREW, (M6 x 14)
28 12-36001 WASHER
Crankshaft, Pistons and Connecting Rods (22 parts) Crankshaft, Pistons and Connecting Rods
Ref OEM Part # Part Name
- 27-841220A03 GASKET SET, Powerhead
1 482-842753A02 CRANKSHAFT ASSEMBLY
2 NSS NOT SOLD SEPARATE, Wear Sleeve
3 30-67923T BEARING, Ball (Lower)
4 53-67446 RING
5 39-843198T01 RING, Seal
6 28-91800 KEY, Woodruff
7 25-35126 O-RING, (.859 x .139)
8 31-88270A02 RACE ASSEMBLY
9 31-88269T BEARING ASSEMBLY
10 2720-843199T13 PISTON ASSEMBLY Comment: (Starboard) SN# 1B227000 & Up
11 40-841202 RING
12 39-858772A02 RING SET, Piston
13 600-8M0125869 CONNECTING ROD ASSEMBLY
14 10-94320 SCREW, (.375-24 x 1.250)
15 31-844338A01 BEARING/CAGE KIT
16 NSS NOT SOLD SEPARATE, Needle Roller Bearing
17 12-88263 THRUST WASHER
18 29-8M0204715 BEARING, Needle
19 31-816773A2 BEARING ASSEMBLY (Upper)
20 26-859093 SEAL
21 25-823683 O-RING, (1.989 x .070)
Cylinder Block and End Cap (47 parts) Cylinder Block and End Cap
Ref OEM Part # Part Name
- 27-841220A03 GASKET SET, Powerhead
1 885-899162A06 CYLINDER BLOCK
2 10-81893440 SCREW, (M8 x 40)
3 8M0111325 BRACKET
4 16-903509 STUD, (M10 x 1.5 x 64)
5 16-8154431 STUD, (M10 x 1.5 x 155)
6 8248577 DEFLECTOR
7 21-8781051 CHECK VALVE
8 17-8M0036405 PIN
9 17-43044 PIN, Dowel - Without Hole (.375 x .625)
10 19-850309001 PLUG, Stop
11 10-81893435 SCREW, (M8 x 35)
12 10-82446180 SCREW, (M10 x 80)
13 22-8245021 CONNECTOR
14 17-63779 PIN, Dowel (.250 x .625)
15 12-8M0214963 WASHER, (.406 x .750 x .105) Stainless Steel
16 11-4013610 NUT, (M10) Stainless Steel
17 8M0082988 SENSOR
18 10-40011107 SCREW, (M5 x 16) Stainless Steel
19 1171-9787A4 END CAP ASSEMBLY
20 25-62700 O-RING, (3.237 x .103)
21 26-8308981 SEAL
22 10-82130020 SCREW, (M6 x 20)
23 10-82130012 SCREW, (M6 x 12)
24 54-858902 CLAMP
25 8215832 PIN, Special (1.5 Inches)
26 10-82130012 SCREW, (M6 x 12)
27 818574 SEAL
28 884391 SEAL
29 900-841020A06 CYLINDER HEAD ASSEMBLY, Port Comment: (Port)
30 8M0057307 THERMOSTAT, 54 Degree C/130 Degree F
31 27-8503181 GASKET
32 887602002 COVER, Thermostat Comment: (Starboard)
33 10-82130025 SCREW, (M6 x 25)
34 10-8M0045380 SCREW, (M8 x 50) Comment: SN# 1B227000 & Up
35 8M0148668 SENSOR ASSEMBLY
36 25-896699 O-RING, (.351 x .072)
37 22-328022 PLUG, Pipe (.125-27) Brass
38 857186T02 PLATE ASSEMBLY
39 23-855729 MOUNT
40 10-82130145 SCREW, (M10 x 45)
41 25-19565002 GROMMET
42 12-855725 WASHER
43 54-858424 CLAMP
44 54-858951 J CLIP
45 10-82130012 SCREW, (M6 x 12)
46 10-82494810 SCREW, (M6 x 10)
Drivehshaft Housing and Exhaust Tube (28 parts) Drivehshaft Housing and Exhaust Tube
Ref OEM Part # Part Name
1 3519-832938A06 HOUSING ASSEMBLY, Driveshaft Comment: (X-Long)
2 16-8M0008031 STUD, (M12 x 52)
3 10-892860 SCREW, (M12 x 35)
4 25-8331231 GROMMET
5 12-856982 WASHER, (.500 x .810 x .090) Stainless Steel
6 11-896895 NUT, (M12) Comment: SN# 1B227000 & Up
7 19-64649 PLUG
8 10-898834 BOLT, (M14 x 178)
9 88238A10 CABLE ASSEMBLY, Ground
10 12-815432 WASHER, (.562 x 2.00 x .125)
11 12-8154331 WASHER, (1.25 x 2.00 x .19)
12 8137711 MOUNT
13 12-825190 WASHER
14 11-896602 NUT
15 8186442 CLAMP
16 10-8M0084475 SCREW, (M8 x 40)
17 13-72521 LOCKWASHER, Internal Tooth
18 8M0001136 COVER, Black
19 10-69079 SCREW, (#10-16 x .440)
20 8329321 SEAL
21 833116A4 TUBE ASSEMBLY, Exhaust
22 35-8M0026113 STRAINER
23 10-81893435 SCREW, (M8 x 35)
24 32-8M0042786 TUBE, Water Comment: (X-Long)
25 832940001 SEAL
26 8329391 CLAMP
27 10-41508 SCREW, (.250-20 x .500) Stainless Steel
28 10-81893435 SCREW, (M8 x 35)
Exhaust Plate (38 parts) Exhaust Plate
Ref OEM Part # Part Name
- 27-841220A03 GASKET SET, Powerhead
1 832935A17 PLATE ASSEMBLY, Exhaust
2 27-8329335 GASKET
3 27-8329344 GASKET (LOWER)
4 8M0043157 SEAL
5 22-8320761 FITTING, Check Valve
6 21-817519A1 CHECK VALVE ASSEMBLY, Drain
7 17-43044 PIN, Dowel - Without Hole (.375 x .625)
8 35-8348084 STRAINER
9 22-887603 FITTING
10 65663A2 COVER ASSEMBLY
11 10-81893435 SCREW, (M8 x 35)
12 814190 CARRIER
13 25-814191 GROMMET
14 814189 POPPET
15 24-64878 SPRING, (Black)
16 65664A1 PLATE ASSEMBLY, Relief Valve
17 27-88907003 GASKET
18 648771 DIAPHRAGM
19 12-76451 WASHER
20 10-69570 SCREW, (#10-16 x .750)
21 10-81893435 SCREW, (M8 x 35)
22 850306A04 BOOT KIT, Idle Exhaust
23 888910 PLATE
24 10-82239312 SCREW, (M5 x 12)
25 19-821908 PLUG
26 12-821915 WASHER
27 32-859626A1 FLUSH HOSE KIT (Inlet)
28 22-8596001 FITTING
29 25-30641 O-RING, (.299 x .103)
30 8219631 CHECK VALVE
31 54-850896 CLAMP, (28.6)
32 22-8M0077650 FITTING, Tell-Tale
33 23-48237 BUSHING
34 43585 COUPLING
35 25-12602002 GROMMET
36 25-822002 GROMMET
37 22-94848 FITTING
Flywheel/Alternator (19 parts) Flywheel/Alternator
Ref OEM Part # Part Name
1 8M6013461 ALTERNATOR
2 24-8523742 SPRING
3 11-400636 NUT
4 856815T2 ARM TENSIONER ASSEMBLY
5 12-4002320 WASHER
6 16-8M0063255 STUD, M10x92 Comment: ProXS
7 23-8568941 BUSHING
8 8M6005030 PULLEY ASSEMBLY
9 10-4010835 SCREW, (M10 x 35) Hex Flange - Stainless Steel
10 57-828507Q5 BELT
11 283-859619T1 FLYWHEEL
12 11-42979 NUT, (M16)
13 12-33001 WASHER, (.641 x 1.250 x .190)
14 12-47533 WASHER, Thermostat
15 11-401386 NUT, (M6) Stainless Steel
16 84-856583A5 CABLE ASSEMBLY, To Block
17 12-4002319 WASHER
18 10-82130150 SCREW, (M10 x 50)
19 19-45907 PLUG, Yellow
Fuel Pump (23 parts) Fuel Pump
Ref OEM Part # Part Name
- 27-841220A03 GASKET SET, Powerhead
1 NSS NOT SOLD SEPARATE, Fuel Pump
2 21-857005A1 DIAPHRAGM KIT
3 NSS NOT SOLD SEPARATE, Diaphragm
4 NSS NOT SOLD SEPARATE, Retainer
5 NSS NOT SOLD SEPARATE, Spring
6 NSS NOT SOLD SEPARATE, Cap
7 NSS NOT SOLD SEPARATE, Spring
8 NSS NOT SOLD SEPARATE, Cap
9 NSS NOT SOLD SEPARATE, Diaphragm
10 NSS NOT SOLD SEPARATE, Gasket-Boost
11 NSS NOT SOLD SEPARATE, Gasket-Pulse
12 25-8M0204683 O-RING, (.301 x .070)
13 987752 PLATE
14 22-996642 FITTING, Elbow 90 Degree (.125-27 x .250) Nylon
15 10-82104540 SCREW, (M5 x 40), Fuel Pump
16 10-82130050 SCREW, (M6 x 50), Pump to Crankcase
17 144303 BASE
18 22-782792 FITTING, Elbow 45 Degree (1.25)
19 22-888493 ELBOW
20 22-822769 CONNECTOR
21 54-816311T TIE STRAP, (8.00 Inches)
22 32-8M0043979 HOSE AND SLEEVE ASSEMBLY, (18.00 Inches)
Fuel Rails (34 parts) Fuel Rails
Ref OEM Part # Part Name
NS 25-804840 O-RING KIT
1 844144T01 FUEL RAIL, Port
2 844145T01 FUEL RAIL, Starboard
3 54-804830 CLAMP
4 10-804525001 SCREW PACKAGE, (2 Per)(M5 x 10)
5 8M0047053 VALVE ASSEMBLY, (.375 Inch Diameter)
6 25-804840 O-RING KIT
7 22-805515 CAP, Shrader Valve - Brass
8 19-804835 PLUG
9 8M0041097 CLAMP
10 54-8048311 CLAMP
11 8M0222157 INJECTOR
12 25-804530 O-RING KIT
13 25-804529 O-RING KIT
14 804522 CLAMP
15 804532 O-RING KIT Comment: (16 PER KIT)
16 54-804832 CLAMP
17 804526 SCREW PACKAGE, (M5 x 16) (2 Per)
18 804535001 COVER
19 24-804534001 SPRING
20 804533 DIAPHRAGM ASSEMBLY
21 25-804536 O-RING
22 22-804836 FITTING
23 32-804827 HOSE
24 32-889310 HOSE, Fuel Supply
25 32-889311 HOSE, Fuel By Pass
26 26-888852 SEAL, Fuel Director
27 8M6001744 INJECTOR ASSEMBLY, Air
28 26-804875 SEAL KIT
29 12-859404002 WASHER, Injection Comment: SN# 1B227000 & Up
30 828791 CLIP
31 16-8M0063255 STUD, (M10 x 91)
32 11-826292 NUT, (M10) Brass/Nickel Plated
33 54-8M0214964 CLAMP, Hose (15.3)
Gear Housing(Driveshaft)(TorqueMaster) (47 parts) Gear Housing(Driveshaft)(TorqueMaster)
Ref OEM Part # Part Name
- 817275A5 REBUILD KIT, Water Pump
1 1689-842739T16 GEAR HOUSING ASSEMBLY, Basic
2 17-379721 PIN
3 821526001 FILLER BLOCK
4 97-826134Q ANODE
5 10-4000333 SCREW, (M6 x 40)
6 11-401386 NUT, (M6) Stainless Steel
7 31-42647A1 BEARING ASSEMBLY, Roller
8 17-43044 PIN, Dowel - Without Hole (.375 x .625)
9 10-79953Q04 SCREW KIT, (.375-16 x .250) Drain
10 12-191833 SEAL
11 859402 PITOT TUBE
12 26-8M0204708 SEAL, Oil
13 22-881866 FITTING
14 858934 COVER
15 27-858935 GASKET
16 25-8M0214927 O-RING, (.799)
17 10-82130016 SCREW, (M6 x 16)
18 10-82130016 SCREW, (M6 x 16)
19 NSS NOT SOLD SEPARATE, Pinion Gear (Part of 43-828168T3)
20 12-92721 WASHER
21 11-35921 NUT, (.625-18)
22 12-77674 WASHER
23 824145 SHIFT SHAFT (Lower)
24 28-8M0204723 KEY
25 45-881942 DRIVESHAFT Comment: (X-Long)
26 15-8M0063268 SHIM ASSEMBLY
27 31-8M0146553 BEARING, Tapered Roller
28 NSS NOT SOLD SEPARATE, Cup
29 15-42637A1 SHIM SET
30 31-8M0146566 BEARING, Roller
31 NSS NOT SOLD SEPARATE, Cup
32 8245191 RETAINER
33 8M0192207 CARRIER ASSEMBLY
34 25-8M0142854 O-RING, (2.175 x .175)
35 26-8M0214939 SEAL, Oil
36 26-8M0214939 SEAL, Oil
37 10-82130016 SCREW, (M6 x 16)
38 817275A1 HOUSING KIT, Water Pump
39 26-816575A2 SEAL KIT
40 27-430331 GASKET
41 27-8172771 GASKET
42 8M0204709 FACEPLATE
43 47-43026T2 IMPELLER
44 832942A1 COUPLING ASSEMBLY
45 25-8M0204645 O-RING, (.796 x .139)
46 25-8M0204654 O-RING, (1.046)
Gear Housing, Propeller Shaft - Torque Master (37 parts) Gear Housing, Propeller Shaft - Torque Master
Ref OEM Part # Part Name
- 26-816575A6 SEAL KIT, Gear Housing
1 1689-842739T16 GEAR HOUSING ASSEMBLY, Basic
2 8M0226861 SHIFT CRANK
3 8M0235940 SPOOL ASSEMBLY
4 NSS NOT SOLD SEPARATE, Shift Spool
5 NSS NOT SOLD SEPARATE, Sleeve
6 NSS NOT SOLD SEPARATE, Cotter Pin
7 15-47397A1 SHIM SET
8 43-859321T04 GEAR SET, Forward/Pinion
9 31-828437A2 BEARING ASSEMBLY
10 NSS NOT SOLD SEPARATE, Cup
11 31-30895T BEARING, Needle
12 53-856823 RING, Retaining
13 52-848878T CLUTCH
14 17-78909 PIN, Detent
15 17-848838 PIN, Cross
16 24-78962 SPRING
17 44-841978 PROPELLER SHAFT
18 43-8M0192235 GEAR, Reverse
19 23-8241081 THRUST SPACER
20 30-88957T BEARING, Ball
21 681001 RING, Thrust
22 25-8M0214920 O-RING
23 848840A1 CARRIER ASSEMBLY, Bearing
24 31-817072 BEARING, Roller
25 53-817071 RING, Snap
26 26-815565 SEAL, Oil
27 28-30281 KEY
28 22-8M0058389 PLUG KIT, Drain - Magnetic
29 12-191833 SEAL
30 14-79447 TAB WASHER
31 8M2011027 RETAINER
32 8480611 COVER
33 12-85344 WASHER, (.750 Inside Diameter)
34 11-52707Q1 PROP NUT KIT, (.750-16)
35 10-8M0204686 SCREW, (.437-14 x 1.750)
36 97-76214Q5 ANODE KIT
Oiling System (37 parts) Oiling System
Ref OEM Part # Part Name
1 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 11.50 Inches)
2 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 5 Inches)
3 35-8M0207786 FILTER
4 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 9 Inches)
5 1200-8M0064075 TANK, Oil
6 NSS NOT SOLD SEPARATE, Decal-Reservoir
7 25-855362001 GROMMET
8 23-855364 BUSHING
9 23-883050 SPACER
10 10-58376 SCREW, (.164-18 x .375)
11 12-72761 WASHER, (.203 x .562 x .060) Stainless Steel
12 87-856156T04 SWITCH
13 32-885553 HOSE
14 22-8M0207780 FITTING
15 19-887609 PLUG
16 12-4002318 WASHER
17 10-81893435 SCREW, (M8 x 35)
18 54-816311T TIE STRAP, (8.00 Inches)
19 32-8752891 HOSE
20 22-858955 CONNECTOR
21 32-875283 HOSE, (2.00 Inches)
22 35-875284T01 FILTER, Oil - In Line
23 NSS NOT SOLD SEPARATE, Plug
24 32-892830053 HOSE, (24.00 Inches Braided) (Cut to 22 Inches)
25 10-81893460 SCREW, (M8 x 60)
26 21-858870 CHECK VALVE
27 859230T RETAINER
28 32-8M0054213 HOSE, (40.00 Inches Bulk) (Cut to 34 Inches) To Oil Pump Connection Illustrated as #2
29 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 19.50 Inches) To Oil Pump Connection Illustrated as #6
30 56762 TIE STRAP, (4.00 Inches)
31 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 11 Inches) To Oil Pump Connection Illustrated as #5
32 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 6 Inches) To Oil Pump Connection Illustrated as #4
33 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 4 Inches) To Oil Pump Connection Illustrated as #3
34 22-883988 ELBOW
35 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 22 Inches) To Oil Pump Connection Illustrated as #7
36 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 16.50 Inches) To Oil Pump Connection Illustrated as #1
37 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 7 Inches)
Port Center Main Oiling System (13 parts) Port Center Main Oiling System
Ref OEM Part # Part Name
- 61-843034A07 POWERHEAD ASSEMBLY
1 22-887801 FITTING, Elbow 90 Degree (.0625-27)
2 22-887801 FITTING, Elbow 90 Degree (.0625-27)
3 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 20.50 Inches)
4 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 5 Inches)
5 21-8592352 CHECK VALVE, 90 Degree (.0625-27)
6 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 13 Inches)
7 21-8282182 CHECK VALVE
8 21-8582362 CHECK VALVE
9 54-23567 CLIP
10 10-878608 SCREW, (#10-16 x .500)
11 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 11 Inches)
12 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 9.50 Inches)
Power Trim Components (38 parts) Power Trim Components
Ref OEM Part # Part Name
- 855998A11 POWER TRIM ASSEMBLY, Complete Comment: SN# 1B227000 & Up
1 878265A4 TRIM MOTOR
2 NSS NOT SOLD SEPARATE, Armature
3 NSS NOT SOLD SEPARATE, End Frame
4 10-82494830 SCREW, (M6 x 30)
5 13-400256 LOCKWASHER, (M6)
6 8782451 DRIVESHAFT
7 878410A1 PO CHECK KIT
8 893929A01 MANUAL RELEASE ASSEMBLY (Includes Reference #26)
9 8M0142997 SHAFT KIT
10 17-878267 PIN
11 878235A03 TILT CYLINDER ASSEMBLY Comment: SN# 1B227000 & Up
12 878239A02 GUIDE KIT (Includes Reference #26)
13 8M0142999 O-RING KIT (Includes Reference #26)
14 8M0168219 SHOCK ROD KIT (Includes Reference #26)
15 8M0143000 PISTON ASSEMBLY, Memory
16 878406A02 REPAIR KIT, Check Valve (Includes Reference #26)
17 878414T01 PISTON ASSEMBLY
18 878413A1 PISTON ASSEMBLY
19 1100-8M0021648 GUIDE ASSEMBLY
20 878264A1 RESERVOIR KIT
21 19-811613 PLUG ASSEMBLY
22 10-4000327 SCREW, (M6 x 14)
23 12-4002315 WASHER
24 892251A01 PUMP KIT
25 878408A1 REPAIR KIT, Power Trim
26 17-821539 PIN, Trilobe
27 10-858771 SCREW, (M10 x 30)
28 12-4002319 WASHER
29 97-818298Q1 ANODE KIT
30 10-8M0204707 SCREW, (M6 x 25)
31 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
32 99625002 SHAFT
33 8M0084613 C WASHER
34 54-22875 CLIP
35 10-878608 SCREW, (#10-16 x .500)
36 32-828547353 CONDUIT, (.350 Inside Diameter x 3.00 Feet Bulk) (Cut to 12 Inches)
37 54-816311T TIE STRAP, (8.00 Inches)
Powerhead Gasket Set Components (1 parts) Powerhead Gasket Set Components
Ref OEM Part # Part Name
- 27-88907003 GASKET, Relief Valve Cover and Plate
Service/Support Material (1 parts) Service/Support Material
Ref OEM Part # Part Name
- 37-898246A06 DECAL, EPA Label Information Comment: (2006)
Solenoid Plate (50 parts) Solenoid Plate
Ref OEM Part # Part Name
- 84-881262A2 HARNESS ASSEMBLY, Alternator, Alternator
1 858366T2 PLATE
2 89-817109A2 SOLENOID ASSEMBLY, (#10-32 / .3125-18 Terminals)
3 25-822179 GROMMET
4 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
5 10-82129125 SCREW, (M6 x 25 MM)
6 23-8M0214955 BUSHING
7 8M0207773 RELAY ASSEMBLY
8 NSS NOT SOLD SEPARATE, Decal-Trim Relay
9 828102 BRACKET
10 23-8M0214955 BUSHING
11 25-818967 GROMMET
12 10-82129110 SCREW, (M6 x 10)
13 54-816311T TIE STRAP, (8.00 Inches)
14 54-828991T CLIP
15 54-858755 CLIP, (1.00)
16 84-878231A6 HARNESS ASSEMBLY, Fuse - 100 Ampere
17 84-819514T21 HARNESS ASSEMBLY, Trim
18 84-892971T01 HARNESS ASSEMBLY, Engine
19 88-832969T05 FUSE, Mini - Tan - 5 Ampere Comment: (5 AMP)
20 858754 COVER, Fuse
21 84-882829A1 CABLE ASSEMBLY, Starter
22 84-88439A46 CABLE ASSEMBLY, Battery - Positive
23 11-8M0204668 NUT, (.312-18)
24 13-53166 LOCKWASHER, (.312)
25 10-32,11-813938 CAP NUT,
26 10-32,11-45076 NUT, Brass
27 84-88807A16 CABLE ASSEMBLY, (4.00 Inches) Black
28 13541 PLUG, Male
29 88555755T PCM, Propulsion Control Module
30 10-82130025 SCREW, (M6 x 25)
31 12-65567 WASHER, (.265 x .750 x .048) Stainless Steel
32 25-8M0190980 GROMMET
33 23-856954 BUSHING
34 54-891520001 CLIP
35 10-82129114 SCREW, (M6 x 14)
36 892295F01 BRACKET
37 25-8M0190980 GROMMET
38 23-822003 BUSHING
39 881879T11 SENSOR, Pressure (0 - 100 PSI)
40 22-8M0207782 FITTING
41 54-883066 CLIP, (.865)
42 54-879962 CLIP
43 10-82130025 SCREW, (M6 x 25)
44 10-82130012 SCREW, (M6 x 12)
45 84-88439A26 CABLE ASSEMBLY, Battery - Negative
46 10-81893420 SCREW, (M8 x 20)
47 830796A04 CONNECTOR ASSEMBLY, Weather Cap - Male
48 84-896542T01 HARNESS ASSEMBLY, Adaptor (Use where Applicable)
49 877613A02 CONNECTOR ASSEMBLY, Weather Cap 6 Pin
Starboard Center Main Oiling System (8 parts) Starboard Center Main Oiling System
Ref OEM Part # Part Name
- 61-843034A07 POWERHEAD ASSEMBLY
1 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 15.50 Inches)
2 21-8592352 CHECK VALVE, 90 Degree (.0625-27)
3 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 16.50 Inches)
4 32-8M0054152 TUBING, (38.00 Inches Bulk) (Cut to 15 Inches)
5 54-23567 CLIP
6 10-878608 SCREW, (#10-16 x .500)
7 22-887801 FITTING, Elbow 90 Degree (.0625-27)
Starter Motor (13 parts) Starter Motor
Ref OEM Part # Part Name
1 50-892339T01 STARTER MOTOR ASSEMBLY
2 10-803005 THRU BOLT
3 43-880805A1 GEAR KIT
4 809463A1 SOLENOID KIT
5 10-69035 SCREW AND LOCKWASHER, (.250-20 x .625) Stainless Steel
6 84-93388A1 CABLE ASSEMBLY, (6.00 Inches) Black
7 NSS NOT SOLD SEPARATE, Decal-Warning-High Voltage
8 13-400255 LOCKWASHER, (M5)
9 11-400211 NUT, (M5) Stainless Steel
10 13-8M0204647 LOCKWASHER, (.312)
11 11-400213 NUT, (M8) Stainless Steel
12 23-8M0034918 COLLAR
13 8M0043276 STOP
Swivel Bracket and Steering Arm (32 parts) Swivel Bracket and Steering Arm
Ref OEM Part # Part Name
1 1499-8M0102865 SWIVEL BRACKET ASSEMBLY, Black
2 25-8M0214926 O-RING
3 23-818764 BUSHING
4 23-816039 SPACER
5 26-87735 SEAL, Oil (LOWER)
6 22-8M0169589 FITTING, Grease
7 23-821207 BUSHING
8 12-816432 THRUST WASHER
9 826364T YOKE, Bottom Comment: (Stainless Steel)
10 53-67684 RING, Retaining
11 8M0045383 STRIKER PLATE
12 13-58643 LOCKWASHER, (.375)
13 11-46335 NUT, (.375-24)
14 10-64014 SCREW, (.250-28 x .500)
15 NSS NOT SOLD SEPARATE, Decal-Serial Overlaminate
16 859187A1 SENDER ASSEMBLY, Trim
17 10-852368 SCREW, (#10-24 x .750)
18 10,13-26996 LOCKWASHER, Stainless Steel
19 12-89302 WASHER, (.203 x .406 x .040)
20 17-8M0132731 SWIVEL PIN ASSEMBLY, Steering Arm - Stainless Steel Comment: (Stainless Steel)
21 10-8M0141069 SCREW, (M12 x 190)
22 824998001 BUMPER
23 8163851 MOUNT, Upper
24 12-8154371 WASHER
25 12-815436 WASHER
26 11-896963 NUT, (M12)
27 8M0036783 CLAMP
28 10-81893435 SCREW, (M8 x 35)
29 92876A12 LINK ROD ASSEMBLY
30 10-849838 SCREW, (.375-24 x 1.250)
31 11-8M0204726 NUT, (.375-24) Stainless Steel
32 12-37828 WASHER, (.390 x .625 x .062) Stainless Steel
Throttle Linkage (45 parts) Throttle Linkage
Ref OEM Part # Part Name
1 8M0040987 LEVER
2 10-81893460 SCREW, (M8 x 60)
3 23-887605 BUSHING
4 23-821113 BUSHING
5 10-40124 SCREW, (M6 x 55)
6 11-400212 NUT, (M6) Stainless Steel
7 42942 CAP
8 42927 INSERT
9 11-401386 NUT, (M6) Stainless Steel
10 23-8M0215006 BUSHING
11 884834 LINK
12 824010T05 BRACKET, Anchor
13 824016 LATCH
14 10-42975 DRIVE SCREW
15 824015 CUP, Barrel Retainer
16 10-82155025 SCREW, (M8 x 25 MM) Stainless Steel
17 12-43430 WASHER
18 10-82155025 SCREW, (M8 x 25 MM) Stainless Steel
19 8M0039052 BRACKET, Slide
20 87-8M0207794 SWITCH
21 54-816311T TIE STRAP, (8.00 Inches)
22 10-82470620 SCREW, (M3.5 x 20)
23 12-35459 WASHER
24 883142A03 SHIFT LINK KIT
25 8539683 SLIDE
26 11-401366 NUT, (M6) Stainless Steel
27 23-42994 BUSHING
28 8M0187153 SHIFT SHAFT, Upper Comment: (X-Long)
29 10-40011113 SCREW, (M5 x 45) Stainless Steel
30 8582261 COVER
31 8M0008111 LINK
32 883081 LEVER
33 8M6005165 INDICATOR, Throttle Position
34 10-82130025 SCREW, (M6 x 25)
35 12-65567 WASHER, (.265 x .750 x .048) Stainless Steel
36 25-8M0190980 GROMMET
37 23-856954 BUSHING
38 8544862 BRACKET
39 54-858932 CLIP
40 858353T5 CAM ASSEMBLY
41 8235694 BALL, Threaded
42 23-8M0215006 BUSHING
43 10-40011155 SCREW, (M8 x 55) Stainless Steel
44 23-8807371 BUSHING
45 12-56720 WASHER, (.330 x .750 x .060) Stainless Steel
Top Cowl (22 parts) Top Cowl
Ref OEM Part # Part Name
- 37-897136A05 DECAL SET
1 100-881288T32 TOP COWL ASSEMBLY
2 10-82130030 SCREW, (M6 x 30)
3 884041A04 SOUND BLANKET KIT
4 NSS NOT SOLD SEPARATE, Sound Blanket-Top
5 NSS NOT SOLD SEPARATE, Sound Blanket-Port
6 13-93702 WASHER, (.250 External Star)
7 826639T COVER
8 850682T4 HOOK ASSEMBLY, Rear Latch
9 NSS NOT SOLD SEPARATE, Pin
10 53-8237951 RING, Retaining
11 8M0207770 ROLLER
12 25-850685T02 GROMMET
13 8M0036792 BRACKET, Front
14 10-82130020 SCREW, (M6 x 20)
15 815477 BUMPER, Latch
16 8155381 PIN, Roll
17 11-401366 NUT, (M6) Stainless Steel
18 12-8M0204649 WASHER, (.281 x .500 x .060) Stainless Steel
19 53-8237951 RING, Retaining
20 8M0207770 ROLLER
21 12-87161 WASHER
Transom Brackets (19 parts) Transom Brackets
Ref OEM Part # Part Name
1 3426-828334T03 BRACKET ASSEMBLY, Transom-Starboard
2 3425-828333T08 BRACKET ASSEMBLY, Transom-Port
3 22-8M0169588 FITTING, Grease (PORT)
4 826125A1 TILT TUBE
5 11-826135 NUT, (1.00-14) Nylon Insert
6 25-45711 O-RING, (.612 x .103)
7 13-88750 WASHER
8 11-826164 NUT, (.875-14)
9 10-8M0149747 SCREW, (.500-20 x 4.500)
10 12-8M0204665 WASHER, (.530 x .870 x .105) Stainless Steel
11 12-8M0204648 WASHER, (1.5 x 3.05 x 0.13) Stainless Steel
12 11-82671117 NUT, (.500-20)
13 8M0115104 LEVER ASSEMBLY, Tilt Lock
14 24-830899 SPRING, Tension
15 23-65830 NYLINER
16 24-830900 SPRING, Compression
17 99633 KNOB
18 17-99615 PIN, Groove
19 17-893709 PIN
Vapor Separator Components (43 parts) Vapor Separator Components
Ref OEM Part # Part Name
- 25-889316A1 O-RING KIT, Vapor Seperator
1 889317T1 COVER KIT
2 NSS NOT SOLD SEPARATE, Seat
3 889318001 PLATE, Baffle
4 10-883223 SCREW, (M6 x 16)
5 27-889319 GASKET
6 22-883556 FITTING
7 25-8M0062785 O-RING
8 22-889329 FITTING
9 19-883208 PLUG
10 35-8M0122423 FILTER, Fuel
11 889320A1 FLOAT KIT
12 F10064 SHAFT
13 888725T02 PUMP ASSEMBLY, Fuel - High Pressure
14 8M6000589 SLEEVE
15 25-8893162 O-RING
16 26-889321 SEAL
17 889328 RETAINER
18 1395-9643 SCREW
19 888733T02 PUMP ASSEMBLY, Boost
20 25-889322 GROMMET
21 25-889316 O-RING
22 26-8M6001413 SEAL
23 889324T03 BOWL KIT
24 84-889325A02 WIRE
25 NSS NOT SOLD SEPARATE, Check Valve
26 22-855424011 FITTING
27 889326A1 VALVE KIT, Inlet
28 10-889327A1 SCREW, Drian
29 25-8893161 O-RING
30 8M0214989 SENSOR, Water
31 22-782792 FITTING, Elbow 45 Degree (1.25)
32 25-627021 O-RING, (.301 x .070)
33 889430 INSERT
34 32-883545002 HOSE
35 884820 SHRADER VALVE
36 25-891778 O-RING
37 54-884819 CLIP
38 10-82130012 SCREW, (M6 x 12)
39 25-855362001 GROMMET
40 23-883050 SPACER
41 10-81893460 SCREW, (M8 x 60)
42 12-4002318 WASHER
Water Hoses (13 parts) Water Hoses
Ref OEM Part # Part Name
- 61-843034A07 POWERHEAD ASSEMBLY
1 22-858855 FITTING, Straight
2 54-855228 CLAMP, (25.6 mm)
3 32-859090001 HOSE, Starboard Dump (Starboard)
4 32-859089001 HOSE, Port Dump (Port)
5 32-856839 TUBING, To Telltale
6 54-816311T TIE STRAP, (8.00 Inches)
7 32-858807 HOSE
8 54-816311T TIE STRAP, (8.00 Inches)
9 32-858865 HOSE
10 54-816311T TIE STRAP, (8.00 Inches)
11 22-291112 FITTING
12 22-996642 FITTING, Elbow 90 Degree (.125-27 x .250) Nylon

100-Hour / Annual Service Checklist

Regular maintenance keeps your Mercury 225 PRO XS (3.0L DFI) 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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