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Parts for Mercury Marine 1250 Crankshaft, Pistons & Connecting Rods

#1 436-3187A 2 CRANKSHAFT ASSEMBLY (NOT AS SHOWN) (1, required per assembly)
436-3187A 2 - CRANKSHAFT         - Replaced by 436-3187A 4
 

436-3187A 2 - Crankshaft [ More info ]
Unavailable
436-3187A 4 - CRANKSHAFT         - Replaced by 436-4842A 3
 

436-3187A 4 - Crankshaft [ More info ]
Unavailable
436-4842A 3 - CRANKSHAFT         - Replaced by 436-6646A 2
 

436-4842A 3 - Crankshaft [ More info ]
Unavailable
436-6646A 2 - CRANKSHAFT ASSEMB  - Replaced by 436-9072A 1
 

436-6646A 2 - Crankshaft [ More info ]
Unavailable
436-9072A 1 - CRANKSHAFT ASSEMB  NLA
 

About Mercury Marine

OEM Part

436-9072A 1 - Crankshaft,NLA [ More info ]
Unavailable
#1 436-3187A 4 CRANKSHAFT ASSEMBLY (NOT AS SHOWN) (,1 required per assembly)
#2 11-52901 NUT, FLYWHEEL TO CRANKSHAFT (,1 required per assembly)
NUT (.625-18) 11-52901
11-52901

About Mercury Marine

OEM Part

11-52901 - Nut (5/8-18)-tailstock Screw [ More info ]

Add to shopping cart $12.70
Available to Order: Usually ships within 10 days.

#3 30-32117 BEARING, BALL - UPPER (1,1 required per assembly)
30-32117 - BALL BEARING       - Replaced by 30-62567
 

30-32117 - Ball Bearing [ More info ]
Unavailable
30-62567 - BEARING Ball       - Replaced by 30-62567T
30-62567

30-62567 - Ball Bearing [ More info ]
Unavailable
BALL BEARING 30-62567T
30-62567T

About Mercury Marine

OEM Part

30-62567T - Ball Bearing [ More info ]

Add to shopping cart $119.42
Available to Order: Usually ships within 10 days.

#4 30-20080 BEARING, BALL - LOWER (1,1 required per assembly) SERIAL 00000000-02709827
30-20080 - BALL BEARING       - Replaced by 30-53853
 

30-20080 - Ball Bearing [ More info ]
Unavailable
30-53853 - BALL BEARING       - Replaced by 30-63742
 

30-53853 - Ball Bearing [ More info ]
Unavailable
30-63742 - BEARING Ball       - Replaced by 30-63742T
30-63742

30-63742 - Ball Bearing [ More info ]
Unavailable
BEARING-BALL 30-63742T
30-63742T

About Mercury Marine

OEM Part

30-63742T - Ball Bearing [ More info ]

Add to shopping cart $32.25
Available to Order: Usually ships within 10 days.

BALL BEARING
18-1154

About Sierra Marine

OEM Match

18-1154 - Bearing, 30-63742, 377139 [ More info ]

Add to shopping cart $28.99 $26.47
In Stock

#4 30-53853 BEARING, BALL - LOWER (,1 required per assembly) SERIAL 02709828-09999999
#5 535-3190A 1 CENTER MAIN BEARING ASSEMBLY (2,2 required per assembly)
5353190A2    C/M BEARING 535-3190A 1
 

About Mercury Marine

OEM Part

535-3190A 1 - C/M Bearing [ More info ]

Add to shopping cart $65.00
10+ In Stock.

C/M BEARING,NLA 535-3190A 2
 

About Mercury Marine

OEM Part

535-3190A 2 - C/M Bearing, NLA [ More info ]

Add to shopping cart $65.00
1 In Stock.

#6 17-20032 DOWEL PIN, CENTER MAIN BEARING (4,4 required per assembly)
PIN-DOWEL 17-20032
 

About Mercury Marine

OEM Part

17-20032 - Pin -Dowel - Priced Individually [ More info ]

Add to shopping cart $2.30
10+ In Stock.

#7 29-48410 BEARING, NEEDLE - OUTER RACE (112,112 required per assembly)
29-48410 - NEEDLE BRG @200    - Replaced by 29-52168
 

29-48410 - Needle Bearing [ More info ]
Unavailable
2971422 29-52168
29-52168

About Mercury Marine

OEM Part

29-52168 - Needle Bearing [ More info ]

Add to shopping cart $0.29
10+ In Stock.

29714221   PRICED EACH"" 29-71422
29-71422

About Mercury Marine

OEM Part

29714221 PRICED EACH [ More info ]

Add to shopping cart $0.30
10+ In Stock.

BRG-NEEDLE 29-714221
29-714221

About Mercury Marine

OEM Part

29-71422 1 - Needle Bearing - Priced Individually [ More info ]

Add to shopping cart $0.30
10+ In Stock.

#8 26113 RACE, OUTER (PAIR) (2,2 required per assembly)
26113 - RACE               - Replaced by -26113T
26113

26113 - Outer Race [ More info ]
Unavailable
RACE-CENTER MAIN 26113T
26113T

About Mercury Marine

OEM Part

26113T - Race - Center Main [ More info ]

Add to shopping cart $141.83
Available to Order: Usually ships within 10 days.

#9 53-26933 RING, SMAP - OUTER RACE (2,2 required per assembly)
RING-SNAP,NLA 53-26933
 

About Mercury Marine

OEM Part

53-26933 - Ring -snap, NLA [ More info ]

Add to shopping cart $3.99
10+ In Stock.

#10 17-47246 DOWEL PIN, STEPPED (2,2 required per assembly)
PIN,NLA 17-47246
 

About Mercury Marine

OEM Part

17-47246 - Pin, Dowel, Stepped,NLA [ More info ]

Add to shopping cart $7.00
6 In Stock.

#11 10-22968 SCREW, CENTER MAIN BEARING CLAMPING (4,4 required per assembly)
SCREW,NLA 10-22968
 

About Mercury Marine

OEM Part

10-22968 - Screw, NLA [ More info ]

Add to shopping cart $2.77
10+ In Stock.

#12 11-46887 NUT, BEARING CLAMPING SCREW (4,4 required per assembly)
11-46887 - NUT (1/4-28)       - Replaced by 11-20184
 

11-46887 - Nut, (1/4-28) [ More info ]
Unavailable
118M0207775 11-20184
11-20184

About Mercury Marine

OEM Part

11-20184 - Nut, (1/4-28x7/32) [ More info ]

Add to shopping cart $1.70
10+ In Stock.

#13 537-3300A 1 MAIN BEARING ASSEMBLY, VALVE TYPE (3,3 required per assembly)
537-3300A 1 - MAIN BEARING       - Replaced by 540-3943A 1
 

537-3300A 1 - Main Bearing [ More info ]
Unavailable
540-3943A 1 - MAIN BEARING       - Replaced by 540-7238A 2
 

540-3943A 1 - Main Bearing [ More info ]
Unavailable
540-7238A 2 - BEARING ASSEMBLY   NLA
540-7238A 2

About Mercury Marine

OEM Part

540-7238A 2 - REED BLOCK ASSY,NLA [ More info ]
Unavailable
#15 10-45775 SCREW, MAIN BEARING CLAMPING (6,6 required per assembly)
SCREW,NLA 10-45775
 

About Mercury Marine

OEM Part

10-45775 - Screw, NLA [ More info ]

Add to shopping cart $3.49
10+ In Stock.

#16 11-45774 NUT, MAIN BEARING CLAMPING SCREW (6,6 required per assembly)
NUT 11-45774
 

About Mercury Marine

OEM Part

11-45774 - Nut - Priced Individually [ More info ]

Add to shopping cart $22.99
10+ In Stock.

#17 34-48082A 1 REED SET, MATCHED - MAIN BEARING (3,3 required per assembly)
3456007A1 34-48082A 1
 

About Mercury Marine

OEM Part

34-48082A 1 - Reed Assembly [ More info ]

Add to shopping cart $2.50
10+ In Stock.

REED KIT 34-56007A 1
34-56007A 1

About Mercury Marine

OEM Part

34-56007A 1 - Reed Kit [ More info ]

Add to shopping cart $109.90
10+ In Stock.

#18 34-48081 REED STOP, MAIN BEARING REED VALVES (12,12 required per assembly)
48081 - GASKET KIT         - Replaced by 1395-879194024
 

This part has been superseded.

48081 - 48081 - GASKET KIT [ More info ]
Unavailable
Replaced by 1395-879194024
GASKET KIT 1395-879194024
1395-879194024

About Mercury Marine

OEM Part

1395-879194024 - Gasket Kit [ More info ]

Add to shopping cart $8.70
10+ In Stock.

CARB GASKET KIT
18-7006-1

About Sierra Marine

OEM Match

18-7006-1 - Carburetor Gasket Set, 1399-1717 and 1399-2015 [ More info ]

Add to shopping cart $8.99 $8.14
10+ In Stock.

#19 10-48080 SCREW, REED STOP MOUNTING (36,36 required per assembly)
1020597 10-48080
 

About Mercury Marine

OEM Part

10-48080 - Screw Note: Priced Individually [ More info ]

Add to shopping cart $0.55
10+ In Stock.

SCREW 10-20597
10-20597

About Mercury Marine

OEM Part

10-20597 - Screw - Priced Individually [ More info ]

Add to shopping cart $0.30
10+ In Stock.

#20 472-3186A 4 PISTON AND PISTON PIN ASSEMBLY "G" TYPE LOCK RING (6, required per assembly) SEE DRAWING BELOW
742-3186A 4 - PISTON             - Replaced by 742-3512A 4
 

742-3186A 4 - Piston [ More info ]
Unavailable
742-3512A 4 - PISTON             - Replaced by 742-3512A 2
 

742-3512A 4 - Piston [ More info ]
Unavailable
PISTON ,NLA 742-3512A 2
742-3512A 2

About Mercury Marine

OEM Part

742-3512A 2 - Piston, NLA [ More info ]

Add to shopping cart $72.22
8 In Stock.

#21 40-45740 LOCK RING, PISTON PIN G" TYPE LOCK RING (12, required per assembly) SEE DRAWING BELOW
LOCK RING,NLA 40-45740
 

About Mercury Marine

OEM Part

40-45740 - Lock Ring, NLA [ More info ]

Add to shopping cart $1.50
10+ In Stock.

#22 39-45155A12 RING, PISTON (1/16") G" TYPE LOCK RING (2, required per assembly) SEE DRAWING BELOW
39-45155A12 - PISTON RING ASSY   - Replaced by 39-78816A12
 

39-45155A12 - Piston Ring [ More info ]
Unavailable
RING SET-12 PCS 39-78816A12
39-78816A12

About Mercury Marine

OEM Part

39-78816A12 - Rings - 12 Pcs [ More info ]

Add to shopping cart $197.92
Available to Order: Usually ships within 10 days.

PISTON RING
18-3902

About Sierra Marine

OEM Match

18-3902 - Rings, 39-78816A12, 3 Rings Only [ More info ]

Add to shopping cart $47.99 $43.29
4 In Stock.

#20 742-3512A 2 PISTON AND PISTON PIN ASSEMBLY "C" TYPE LOCK RING (6,6 required per assembly) SEE DRAWING BELOW
#21 40-52035 LOCK RING, PISTON PIN "C" TYPE LOCK RING (12,12 required per assembly) SEE DRAWING BELOW
53857196 40-52035
40-52035

About Mercury Marine

OEM Part

40-52035 - Lock Ring - Priced Individually [ More info ]

Add to shopping cart $3.89
10+ In Stock.

RING-LOCK 53-857196
53-857196

About Mercury Marine

OEM Part

53-857196 - Lock Ring - Priced Individually [ More info ]

Add to shopping cart $3.30 $2.80
2 In Stock.

#23 618-3185A 2 CONNECKTING ROD AND CAP ASSEMBLY (6, required per assembly)
618-3185A 2 - CONNECTING ROD     - Replaced by 622-3666A 2
 

618-3185A 2 - CONNECTING ROD [ More info ]
Unavailable
622-3666A 2 - CONNECTING ROD     - Replaced by 622-3666A 5
 

622-3666A 2 - CONNECTING ROD [ More info ]
Unavailable
622-3666A 5 - CONNECTING ROD     - Replaced by 622-3666A 6
 

622-3666A 5 - CONNECTING ROD [ More info ]
Unavailable
622-3666A 6 - CONNECTING ROD     - Replaced by 622-3666A10
 

622-3666A 6 - CONNECTING ROD [ More info ]
Unavailable
622-3666A10 - CONNECTING ROD     - Replaced by 622-4850A4
 

622-3666A10 - CONNECTING ROD [ More info ]
Unavailable
622-4850A4 - ->4850A3 - Replaced by -4850A3
 

622-4850A 4 - CONNECTING ROD [ More info ]
Unavailable
6248101A3 622-4850A3
 

About Mercury Marine

OEM Part

622-4850A 3 - Connecting Rod [ More info ]

Add to shopping cart $40.00
3 In Stock.

CONNECTING ROD,NLA 624-8101A3
624-8101A3

About Mercury Marine

OEM Part

624-8101A 3 - Connecting Rod, NLA [ More info ]

Add to shopping cart $94.44
10+ In Stock.

#23 622-3666A 2 CONNECTING ROD AND CAP ASSEMBLY (,6 required per assembly)
#24 31-47245A 1 BEARING ASSEMBLY, CRANKPIN (6,6 required per assembly)
31-47245A 1 - ROLLER BEARING     - Replaced by 31-55332A 1
 

31-47245A 1 - Roller Bearing [ More info ]
Unavailable
31-55332A 1 - ROLLER BRG @6      - Replaced by 31-58859A 1
 

31-55332A 1 - ROLLER BRG Note: Priced Individually [ More info ]
Unavailable
31-58859A 1 - ROLLER BRG @6      - Replaced by 31-61424A 2
 

31-58859A 1 - ROLLER BRG Note: Priced Individually [ More info ]
Unavailable
31-61424A 2 - ROLLER BRG @6      - Replaced by 31-63075A 1
 

31-61424A 2 - ROLLER BRG Note: Priced Individually [ More info ]
Unavailable
31-63075A 1 - ROLLER BRG @6      - Replaced by 31-62596A 1
 

31-63075A 1 - Roller Bearing - Priced Individually [ More info ]
Unavailable
BEARING ASY,NLA 31-62596A 1
31-62596A 1

About Mercury Marine

OEM Part

31-62596A 1 - Connecting Rod Bearings And Cage, Single [ More info ]

Add to shopping cart $44.43
10+ In Stock.

NEEDLE BEARING SET W/O CAG
18-4038

About Sierra Marine

OEM Match

18-4038 - Needle Bearings, Without Cage, 31-62596A1 [ More info ]

Add to shopping cart $52.49 $47.55
2 In Stock.

#25 10-47240 SCREW, CONNECTING ROD (12,12 required per assembly)
10-47240 - SCREW @10          - Replaced by 10-54803
 

10-47240 - Screw, NLA [ More info ]
Unavailable
SCREW,NLA 10-54803
10-54803

About Mercury Marine

OEM Part

10-54803 - Screw, NLA [ More info ]

Add to shopping cart $5.21
10+ In Stock.

#26 11-49091 NUT, CONNECTING ROD SCREW (12,12 required per assembly)
11-49091 - NUT
11-49091

About Mercury Marine

OEM Part

11-49091 - Nut - Priced Individually [ More info ]
Unavailable
#27 29-47270 BEARING NEEDLE - PISTON PIN (174,174 required per assembly)
298M0214934 29-47270
29-47270

About Mercury Marine

OEM Part

29-47270 - Needle Bearing [ More info ]

Add to shopping cart $0.40
10+ In Stock.

29-8M0214934 - BRG-NEEDLE @200
 

About Mercury Marine

OEM Part

29-8M0214934 - BRG-NEEDLE @200 [ More info ]
Unavailable
NEEDLE BEARING 200
18-4036

About Sierra Marine

OEM Match

18-4036-9 - Bearing, 29-47270, 200PK [ More info ]

Add to shopping cart $47.89 $43.96
2 In Stock.

#28 12-47247 WASHER, NEEDLE LOCATING (12,12 required per assembly)
128M0032839 12-47247
 

About Mercury Marine

OEM Part

12-47247 - Washer - Priced Individually [ More info ]

Add to shopping cart $2.78
6 In Stock.

WASHER 12-8M0032839
 

About Mercury Marine

OEM Part

12-8M0032839 - Washer - Priced Individually [ More info ]

Add to shopping cart $10.90 $9.26
10+ In Stock.


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