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Parts for Mariner 250 HP / 275 HP Crankshaft, Pistons & Connecting Rods

#1 467-8784A 1 CRANKSHAFT ASSEMBLY (1 required per assembly)
467-8784A 1 - CRANKSHAFT ASSEMB O NLA
 

About Mercury Marine

OEM Part

467-8784A 1 - CRANKSHAFT ASSEMB O NLA [ More info ]
Unavailable
#2 30-88268 BALL BEARING (LOWER) (1 required per assembly)
3088268T 30-88268
30-88268

About Mercury Marine

OEM Part

30-88268 - Ball Bearing [ More info ]

Add to shopping cart $76.65
7 in stock. Explain stock levels

BALL BEARING,NLA 30-88268T
30-88268T

About Mercury Marine

OEM Part

30-88268T - Ball Bearing, NLA [ More info ]

Add to shopping cart $98.00
10+ in stock. Explain stock levels

#3 53-89531 RETAINING RING (1 required per assembly)
RING Retaining 53-89531
 

About Mercury Marine

OEM Part

53-89531 - Ring - Retaining [ More info ]

Add to shopping cart $8.50 $5.74
10+ in stock. Explain stock levels

#4 89938 SEAL (1 required per assembly)
SEAL,NLA 89938
 

About Mercury Marine

OEM Part

89938 - Seal, NLA [ More info ]

Add to shopping cart $42.50
10+ in stock. Explain stock levels

#5 89939 SEAT (1 required per assembly)
SEAT,NLA 89939
 

About Mercury Marine

OEM Part

89939 - Seat, NLA [ More info ]

Add to shopping cart $6.00
10+ in stock. Explain stock levels

#6 88261 1 RING (7 required per assembly)
#7 31-88270 BEARING RACE (2 required per assembly)
3188270T 31-88270
 

About Mercury Marine

OEM Part

31-88270 - Bearing [ More info ]

Add to shopping cart $43.05
1 in stock. Explain stock levels

BEARING,NLA 31-88270T
31-88270T

About Mercury Marine

OEM Part

31-88270T - Bearing, NLA [ More info ]

Add to shopping cart $75.00
10+ in stock. Explain stock levels

#8 31-88269 ROLLER BEARING (2 required per assembly)
31-88269 - BEARING Roller    O - Replaced by 31-88269T
 

This part has been superseded.

31-88269 - 31-88269 - BEARING Roller O [ More info ]
Unavailable
Replaced by 31-88269T
BEARING ASSEMBLY 31-88269T
31-88269T

About Mercury Marine

OEM Part

31-88269T - Bearing Assembly [ More info ]

Add to shopping cart $67.00
Available to order: Usually ships within 8 days. Explain stock levels

Main Bearing
18-1347

About Sierra Marine

OEM Match

18-1347 - Bearing 31-88269T - Special Order - No Returns [ More info ]

Add to shopping cart $66.42
In stock - special order item. Explain stock levels

#9 782-9530A 3 PISTON (STARBOARD) (3 required per assembly) NO CASTING #
782-9530A 3 - PISTON ASSEMBLY   O NLA
 

About Mercury Marine

OEM Part

782-9530A 3 - PISTON ASSEMBLY O NLA [ More info ]
Unavailable
#9 782-9531A 3 PISTON (PORT) (3 required per assembly) NO CASTING #
782-9531A 3 - PISTON ASSEMBLY   O NLA
 

About Mercury Marine

OEM Part

782-9531A 3 - PISTON ASSEMBLY O NLA [ More info ]
Unavailable
#9 797-816879A 1 PISTON (STARBOARD_CASTING #797-816879) (3 required per assembly)
PISTON ASY-STBD,NLA 797-816879A 1
797-816879A 1

About Mercury Marine

OEM Part

797-816879A 1 - Piston Assembly - Stbd, NLA [ More info ]

Add to shopping cart $100.00
1 in stock. Explain stock levels

#9 796-816878A 1 PISTON (PORT-CASTING #796-816878) (3 required per assembly)
PISTON ASY-PORT,NLA 796-816878A 1
796-816878A 1

About Mercury Marine

OEM Part

796-816878A 1 - Piston Assembly - Port, NLA [ More info ]

Add to shopping cart $100.00
10 in stock. Explain stock levels

#10 39-18282A12 PISTON RING SET (1 required per assembly)
RING SET-12 PCS,NLA 39-18282A12
39-18282A12

About Mercury Marine

OEM Part

39-18282A12 - Rings - 12 Pcs, NLA [ More info ]

Add to shopping cart $150.00
2 in stock. Explain stock levels

#11 53-88466 LOCK RING (12 required per assembly)
53-88466 - LOCK RING         O - Replaced by 53-88466  1
 

This part has been superseded.

53-88466 - 53-88466 - LOCK RING O [ More info ]
Unavailable
Replaced by 53-88466 1
53-88466  1 - RING-LOCK         O - Replaced by 53-832081
 

This part has been superseded.

53-88466 1 - 53-88466 1 - RING-LOCK O [ More info ]
Unavailable
Replaced by 53-832081
53-832081 - LOCK RING         O - Replaced by 53-832081  1
 

This part has been superseded.

53-832081 - 53-832081 - LOCK RING O [ More info ]
Unavailable
Replaced by 53-832081 1
LOCK RING 53-832081  1
 

About Mercury Marine

OEM Part

53-832081 1 - Lock Ring [ More info ]

Add to shopping cart $0.80
2 in stock. Explain stock levels

#12 631-8185A10 CONNECTING ROD ASSEMBLY (6 required per assembly)
631-8185A10 - CONNECTING ROD AS O NLA
 

About Mercury Marine

OEM Part

631-8185A10 - CONNECTING ROD AS O NLA [ More info ]
Unavailable
#13 10-94320 SCREW (12 required per assembly)
SCREW (.375-24 x 1.250) 10-94320
10-94320

About Mercury Marine

OEM Part

10-94320 - Screw [ More info ]

Add to shopping cart $6.90
10+ in stock. Explain stock levels

#14 31-43012A 2 ROLLER BEARING ASSEMBLY (6 required per assembly)
BEARING/CAGE KIT,NLA 31-43012A 2
31-43012A 2

About Mercury Marine

OEM Part

31-43012A 2 - Bearing/Cage Kit, NLA [ More info ]

Add to shopping cart $55.00
10+ in stock. Explain stock levels

#15 12-88263 WASHER (12 required per assembly)
THRUST WASHER 12-88263
 

About Mercury Marine

OEM Part

12-88263 - Washer [ More info ]

Add to shopping cart $10.10 $6.82
10+ in stock. Explain stock levels

Needle Bearins w/ (2) retai
18-1186

About Sierra Marine

OEM Match

18-1186 - Needle Bearings With Retainers [ More info ]

Add to shopping cart $24.49 $19.04
2 in stock. Explain stock levels

#16 29-88258 NEEDLE BEARING (204 required per assembly)
2988258001 29-88258
29-88258

About Mercury Marine

OEM Part

29-88258 - Needles - Bearing - Priced Individually [ More info ]

Add to shopping cart $0.20
10+ in stock. Explain stock levels

BEARING Needle 29-88258001
29-88258001

About Mercury Marine

OEM Part

29-88258001 - Bearing Needles - Priced Individually [ More info ]

Add to shopping cart $0.34
10+ in stock. Explain stock levels

#17 28-91800 KEY (1 required per assembly)
KEY Woodruff 28-91800
28-91800

About Mercury Marine

OEM Part

28-91800 - Key - Priced Individually [ More info ]

Add to shopping cart $1.65
10+ in stock. Explain stock levels

#18 31-814409A 1 BEARING ASSEMBLY (W/O FITTING) (1 required per assembly)
BEARING,NLA 31-814409A 1
31-814409A 1

About Mercury Marine

OEM Part

31-814409A 1 - Bearing, NLA [ More info ]

Add to shopping cart $100.00
2 in stock. Explain stock levels

#18 31-816773A 1 BEARING ASSEMBLY (WITH FITTING) (1 required per assembly)
BEARING ASSY,NLA 31-816773A 1
31-816773A 1

About Mercury Marine

OEM Part

31-816773A 1 - Bearing Assembly, NLA [ More info ]

Add to shopping cart $75.00
10+ in stock. Explain stock levels

#19 26-41953 OIL SEAL (1 required per assembly)
SEAL Note: must be ordered in multiples of 2 26-41953
26-41953

About Mercury Marine

OEM Part

26-41953 - Seal - Priced Individually [ More info ]

Add to shopping cart $15.30
10+ in stock. Explain stock levels

Oil Seal
18-2016

About Sierra Marine

OEM Match

18-2016 - Seal, 26-41953 [ More info ]

Add to shopping cart $10.99 $8.18
10+ in stock. Explain stock levels

#20 43-41081 1 DRIVER GEAR (1 required per assembly)
43-41081  1 - DRIVER GEAR       O NLA
 

About Mercury Marine

OEM Part

43-41081 1 - DRIVER GEAR O NLA [ More info ]
Unavailable
#21 25-64067 O-RING (1 required per assembly)
25823683 25-64067
25-64067

About Mercury Marine

OEM Part

25-64067 - O-Ring - Priced Individually [ More info ]

Add to shopping cart $1.65
10+ in stock. Explain stock levels

O-RING (1.989 x .070) 25-823683
25-823683

About Mercury Marine

OEM Part

25-823683 - O-Ring [ More info ]

Add to shopping cart $2.20
1 in stock. Explain stock levels

O-Ring
18-7414

About Sierra Marine

OEM Match

18-7414-9 - O-Ring (PK5) 25-64067 [ More info ]

Add to shopping cart $12.45
Available to order: Usually ships within 8 days. Explain stock levels

#22 12-68229 WASHER (1 required per assembly)
1233001 12-68229
 

About Mercury Marine

OEM Part

12-68229 - Washer [ More info ]

Add to shopping cart $4.04
10+ in stock. Explain stock levels

WASHER Note: must be ordered in multiples of 2 12-33001
 

About Mercury Marine

OEM Part

12-33001 - Washer [ More info ]

Add to shopping cart $5.10
Available to order: Usually ships within 8 days. Explain stock levels

#23 11-52901 NUT (1 required per assembly)
NUT (.625-18) 11-52901
11-52901

About Mercury Marine

OEM Part

11-52901 - Nut [ More info ]

Add to shopping cart $9.50
10+ in stock. Explain stock levels