Logo

Parts for Mercury Mark & Kiekhaefer Mark 20H Cylinder Block Assembly

#1 803-41A 1 CYLINDER BLOCK ASSEMBLY (1 required per assembly)
CYLINDER BLOCK    O - Replaced by 803-41A 3
 

This part has been superseded.

803-41A 1 - CYLINDER BLOCK O [ More info ]
Unavailable
Replaced by 803-41A 3
CYLINDER BLOCK    O NLA
 

About Mercury Marine

OEM Part

CYLINDER BLOCK O NLA [ More info ]
Unavailable
#1 803-41A 3 CYLINDER BLOCK ASSEMBLY (1 required per assembly)
#2 16-20956 STUD, DRIVE SHAFT HOUSING TO POWERHEAD (4 required per assembly)
STUD @3           O NLA
 

About Mercury Marine

OEM Part

STUD @3 O NLA [ More info ]
Unavailable
#3 16-21015 STUD, CYLINDER BLOCK TO CRANKCASE (1 required per assembly)
STUD              O NLA
 

About Mercury Marine

OEM Part

STUD O NLA [ More info ]
Unavailable
#4 16-20525 STUD, CYLINDER BLOCK TO CRANKCASE (5 required per assembly)
STUD,NLA 16-20525
 

About Mercury Marine

OEM Part

16-20525 - Stud, NLA [ More info ]

Add to shopping cart $5.00
10 in stock. Explain stock levels

#5 10-20540 SCREW, MANIFOLD COVER (7 required per assembly)
SCREW,NLA 10-20540
 

About Mercury Marine

OEM Part

10-20540 - Screw, NLA [ More info ]

Add to shopping cart $1.25
10+ in stock. Explain stock levels

#6 20539 COVER, EXHAUST MANIFOLD (1 required per assembly)
COVER ,NLA 20539
 

About Mercury Marine

OEM Part

20539 - Cover, NLA [ More info ]

Add to shopping cart $40.00
5 in stock. Explain stock levels

#7 27-20538 GASKET, MANIFOLD COVER TO BAFFLE PLATE (1 required per assembly)
Gasket,NLA 27-20538
 

About Mercury Marine

OEM Part

27-20538 - Gasket, NLA [ More info ]

Add to shopping cart $6.00
6 in stock. Explain stock levels

#8 20537 PLATE, MANIFOLD BAFFLE (1 required per assembly)
PLATE             O NLA
 

About Mercury Marine

OEM Part

PLATE O NLA [ More info ]
Unavailable
#9 27-20536 GASKET, CYLINDER BLOCK TO MANIFOLD PLATE (1 required per assembly)
Gasket,NLA 27-20536
 

About Mercury Marine

OEM Part

27-20536 - Gasket [ More info ]

Add to shopping cart $8.13
10+ in stock. Explain stock levels

#10 1002-63A 1 CYLINDER BLOCK COVER ASSEMBLY (1 required per assembly)
COVER ASSY        O NLA
 

About Mercury Marine

OEM Part

COVER ASSY O NLA [ More info ]
Unavailable
#11 23-26348 BUSHING, COWL MOUNTING (2 required per assembly)
BUSHING      ,NLA 23-26348
 

About Mercury Marine

OEM Part

23-26348 - Bushing , NLA [ More info ]

Add to shopping cart $14.00
10+ in stock. Explain stock levels

#12 12-20028 WASHER, CYLINDER BLOCK COVER SCREW (7/16) (7 required per assembly)
WASHER (.265 x .437 x . 12-20028
 

About Mercury Marine

OEM Part

12-20028 - Washer - Priced Individually [ More info ]

Add to shopping cart $1.40
10+ in stock. Explain stock levels

#13 12-20533 WASHER, CYLINDER BLOCK COVER SCREW (9/16) (1 required per assembly)
WASHER Note: must be ordered in multiples of 5 12-20533
 

About Mercury Marine

OEM Part

12-20533 - Washer - Priced Individually [ More info ]

Add to shopping cart $1.10
10+ in stock. Explain stock levels

#14 54-20534 CLIP, HIGH TENSION LEAD (1 required per assembly)
CLIP              O NLA
 

About Mercury Marine

OEM Part

CLIP O NLA [ More info ]
Unavailable
#15 10-20532 SCREW, COVER TO CYLINDER BLOCK (8 required per assembly)
SCREW @25         O - Replaced by 10-28667
 

This part has been superseded.

10-20532 - SCREW @25 O [ More info ]
Unavailable
Replaced by 10-28667
SCREW (.250-20 x 1.00) 10-28667
10-28667

About Mercury Marine

OEM Part

10-28667 - Screw - Priced Individually [ More info ]

Add to shopping cart $2.00
10+ in stock. Explain stock levels

#16 27-20531 GASKET, CYLINDER BLOCK COVER (1 required per assembly)
Gasket,NLA 27-20531
 

About Mercury Marine

OEM Part

27-20531 - Gasket [ More info ]

Add to shopping cart $15.00
6 in stock. Explain stock levels

#17 10-20031 SCREW, TRANSFER PORT COVER (4 required per assembly)
1098253 10-20031
 

About Mercury Marine

OEM Part

10-20031 - Screw - Priced Individually [ More info ]

Add to shopping cart $0.36
10+ in stock. Explain stock levels

SCREW (.250-20 x .500) 10-98253
10-98253

About Mercury Marine

OEM Part

10-98253 - Screw [ More info ]

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

#19 20029 COVER, TRANSFER PORT (2 required per assembly)
COVER,NLA 20029
 

About Mercury Marine

OEM Part

20029 - Transfer Port Cover, NLA [ More info ]

Add to shopping cart $4.50
10+ in stock. Explain stock levels

#20 27-20030 GASKET, TRANSFER PORT COVER (2 required per assembly)
Gasket,NLA 27-20030
 

About Mercury Marine

OEM Part

27-20030 - Gasket [ More info ]

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

#21 20543A 1 REAR BRACKET ASSEMBLY, TOP COWL MOUNTING (1 required per assembly)
BRACKET ASSY,NLA 20543A 1
 

About Mercury Marine

OEM Part

20543A 1 - Bracket Assembly, NLA [ More info ]

Add to shopping cart $4.00
1 in stock. Explain stock levels

#23 13-26992 LOCKWASHER, REAR BRACEKT MOUNTING SCREW (2 required per assembly)
LOCKWASHER (.250) Stain 13-26992
 

About Mercury Marine

OEM Part

13-26992 - LockWasher - Priced Individually [ More info ]

Add to shopping cart $0.80
10+ in stock. Explain stock levels

#24 10-20542 SCREW, REAR BRACKET MOUNTING (2 required per assembly)
SCREW @5          O - Replaced by 10-28668
 

This part has been superseded.

10-20542 - SCREW @5 O [ More info ]
Unavailable
Replaced by 10-28668
SCREW (.250-20 x .875) 10-28668
10-28668

About Mercury Marine

OEM Part

10-28668 - Screw - Priced Individually [ More info ]

Add to shopping cart $1.20
10+ in stock. Explain stock levels

Screw,Wtr Pckt/Mr Alpha
18-3229

About Sierra Marine

OEM Match

18-3229-9 - Screw, 10-28668, 5PK [ More info ]

Add to shopping cart $9.95 $4.54
Available to order: Usually ships within 8 days. Explain stock levels

#25 27-21173 GASKET, CYLINDER BLOCK TO CRANKCASE (1 required per assembly)
GASKET @5         O NLA
 

About Mercury Marine

OEM Part

GASKET @5 O NLA [ More info ]
Unavailable
#27 12-20346 WASHER, TOP COWL MOUNTING STUD (LARGE) (3 required per assembly)
1269057 12-20346
 

About Mercury Marine

OEM Part

12-20346 - Washer Note: Must be ordered in multiples of 15 [ More info ]

Add to shopping cart $1.00
10+ in stock. Explain stock levels

WASHER (.281 x .734 x . 12-69057
 

About Mercury Marine

OEM Part

12-69057 - Washer [ More info ]

Add to shopping cart $1.40
2 in stock. Explain stock levels

#28 11-20361 NUT, TOP COWL MOUNTING STUD (3 required per assembly)
118267089 11-20361
11-20361

About Mercury Marine

OEM Part

11-20361 - Nut Note: Must be ordered in multiples of 5 [ More info ]

Add to shopping cart $0.60
10+ in stock. Explain stock levels

NUT (.250-28) 11-826708  9
11-826708  9

About Mercury Marine

OEM Part

11-826708 9 - Nut - Priced Individually [ More info ]

Add to shopping cart $1.00
Available to order: Usually ships within 8 days. Explain stock levels

S.S. Steel Locknut
18-3722

About Sierra Marine

OEM Match

18-3722-9 - Lock Nut, 121731, 11-35888 [ More info ]

Add to shopping cart $14.95 $7.67
1 in stock. Explain stock levels