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

Engine Diagram

Ref. No. Part No. Description Manufacturer List Price Your Price Order
#1 803-41A 1 CYLINDER BLOCK ASSEMBLY (1 required per assembly)
CYLINDER BLOCK    O - Replaced by 803-41A 3  
803-41A 1This part has been superseded. CYLINDER BLOCK O - Replaced by 803-41A 3
(more info)
    UnavailableUnavailable Parts
CYLINDER BLOCK    O NLA  
803-41A 3 CYLINDER BLOCK O NLA
(more info)
    UnavailableUnavailable Parts
#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  
16-20956 STUD @3 O NLA
(more info)
    UnavailableUnavailable Parts
#3 16-21015 STUD, CYLINDER BLOCK TO CRANKCASE (1 required per assembly)
STUD              O NLA  
16-21015 STUD O NLA
(more info)
    UnavailableUnavailable Parts
#4 16-20525 STUD, CYLINDER BLOCK TO CRANKCASE (5 required per assembly)
STUD,NLA 16-20525  
16-20525OEM Part 16-20525 - Stud, NLA (more info) About Mercury Marine $5.00 $5.00 Add to shopping cart
10 in stock. Explain stock levels
#5 10-20540 SCREW, MANIFOLD COVER (7 required per assembly)
SCREW,NLA 10-20540  
10-20540OEM Part 10-20540 - Screw, NLA (more info) About Mercury Marine $1.25 $1.25 Add to shopping cart
10+ in stock. Explain stock levels
#6 20539 COVER, EXHAUST MANIFOLD (1 required per assembly)
COVER ,NLA 20539  
20539OEM Part 20539 - Cover, NLA (more info) About Mercury Marine $40.00 $40.00 Add to shopping cart
5 in stock. Explain stock levels
#7 27-20538 GASKET, MANIFOLD COVER TO BAFFLE PLATE (1 required per assembly)
Gasket,NLA 27-20538  
27-20538OEM Part 27-20538 - Gasket, NLA (more info) About Mercury Marine $6.00 $6.00 Add to shopping cart
7 in stock. Explain stock levels
#8 20537 PLATE, MANIFOLD BAFFLE (1 required per assembly)
PLATE             O NLA  
20537 PLATE O NLA
(more info)
    UnavailableUnavailable Parts
#9 27-20536 GASKET, CYLINDER BLOCK TO MANIFOLD PLATE (1 required per assembly)
Gasket,NLA 27-20536  
27-20536OEM Part 27-20536 - Gasket (more info) About Mercury Marine $8.13 $8.13 Add to shopping cart
10+ in stock. Explain stock levels
#10 1002-63A 1 CYLINDER BLOCK COVER ASSEMBLY (1 required per assembly)
COVER ASSY        O NLA  
1002-63A 1 COVER ASSY O NLA
(more info)
    UnavailableUnavailable Parts
#11 23-26348 BUSHING, COWL MOUNTING (2 required per assembly)
BUSHING      ,NLA 23-26348  
23-26348OEM Part 23-26348 - Bushing , NLA (more info) About Mercury Marine $14.00 $14.00 Add to shopping cart
10+ in stock. Explain stock levels
#12 12-20028 WASHER, CYLINDER BLOCK COVER SCREW (7/16) (7 required per assembly)
WASHER (.265 x .4 12-20028  
12-20028OEM Part 12-20028 - Washer - Priced Individually (more info) About Mercury Marine $1.40 $1.40 Add to shopping cart
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  
12-20533OEM Part 12-20533 - Washer - Priced Individually (more info) About Mercury Marine $1.10 $1.10 Add to shopping cart
10+ in stock. Explain stock levels
#14 54-20534 CLIP, HIGH TENSION LEAD (1 required per assembly)
CLIP              O NLA  
54-20534 CLIP O NLA
(more info)
    UnavailableUnavailable Parts
#15 10-20532 SCREW, COVER TO CYLINDER BLOCK (8 required per assembly)
SCREW @25         O - Replaced by 10-28667  
10-20532This part has been superseded. SCREW @25 O - Replaced by 10-28667
(more info)
    UnavailableUnavailable Parts
SCREW (.250-20 x 10-28667 10-28667
10-28667OEM Part 10-28667 - Screw - Priced Individually (more info) About Mercury Marine $1.90 $1.90 Add to shopping cart
10+ in stock. Explain stock levels
#16 27-20531 GASKET, CYLINDER BLOCK COVER (1 required per assembly)
Gasket,NLA 27-20531  
27-20531OEM Part 27-20531 - Gasket (more info) About Mercury Marine $15.00 $15.00 Add to shopping cart
7 in stock. Explain stock levels
#17 10-20031 SCREW, TRANSFER PORT COVER (4 required per assembly)
1098253 10-20031  
10-20031OEM Part 10-20031 - Screw - Priced Individually (more info) About Mercury Marine $0.36 $0.36 Add to shopping cart
10+ in stock. Explain stock levels
SCREW (.250-20 x 10-98253 10-98253
10-98253OEM Part 10-98253 - Screw (more info) About Mercury Marine $0.80 $0.80 Add to shopping cart
10 in stock. Explain stock levels
#19 20029 COVER, TRANSFER PORT (2 required per assembly)
COVER,NLA 20029  
20029OEM Part 20029 - Cover, NLA (more info) About Mercury Marine $4.50 $4.50 Add to shopping cart
10+ in stock. Explain stock levels
#20 27-20030 GASKET, TRANSFER PORT COVER (2 required per assembly)
Gasket,NLA 27-20030  
27-20030OEM Part 27-20030 - Gasket (more info) About Mercury Marine $6.00 $6.00 Add to shopping cart
10+ in stock. Explain stock levels
#21 20543A 1 REAR BRACKET ASSEMBLY, TOP COWL MOUNTING (1 required per assembly)
BRACKET ASSY,NLA 20543A 1  
20543A 1OEM Part 20543A 1 - Bracket Assembly, NLA (more info) About Mercury Marine $4.00 $4.00 Add to shopping cart
1 in stock. Explain stock levels
#23 13-26992 LOCKWASHER, REAR BRACEKT MOUNTING SCREW (2 required per assembly)
LOCKWASHER (.250) 13-26992  
13-26992OEM Part 13-26992 - LockWasher - Priced Individually (more info) About Mercury Marine $0.80 $0.80 Add to shopping cart
10+ in stock. Explain stock levels
#24 10-20542 SCREW, REAR BRACKET MOUNTING (2 required per assembly)
SCREW @5          O - Replaced by 10-28668  
10-20542This part has been superseded. SCREW @5 O - Replaced by 10-28668
(more info)
    UnavailableUnavailable Parts
SCREW (.250-20 x 10-28668 10-28668
10-28668OEM Part 10-28668 - Screw - Priced Individually (more info) About Mercury Marine $1.20 $1.20 Add to shopping cart
Available to order:
Usually ships
within 8 days
Screw,Wtr Pckt/Mr Alpha 18-3229-9
18-3229-9OEM Match 18-3229-9 - Screw, 10-28668, 5PK (more info) About Sierra Marine $9.95 $4.54 Add to shopping cart
Available to order:
Usually ships
within 8 days
#25 27-21173 GASKET, CYLINDER BLOCK TO CRANKCASE (1 required per assembly)
GASKET @5         O NLA  
27-21173 GASKET @5 O NLA
(more info)
    UnavailableUnavailable Parts
#27 12-20346 WASHER, TOP COWL MOUNTING STUD (LARGE) (3 required per assembly)
1269057 12-20346  
12-20346OEM Part 12-20346 - Washer Note: Must be ordered in multiples of 15 (more info) About Mercury Marine $1.00 $1.00 Add to shopping cart
10+ in stock. Explain stock levels
WASHER (.281 x .7 12-69057  
12-69057OEM Part 12-69057 - Washer (more info) About Mercury Marine $1.40 $1.40 Add to shopping cart
4 in stock. Explain stock levels
#28 11-20361 NUT, TOP COWL MOUNTING STUD (3 required per assembly)
118267089 11-20361 11-20361
11-20361OEM Part 11-20361 - Nut Note: Must be ordered in multiples of 5 (more info) About Mercury Marine $0.60 $0.60 Add to shopping cart
10+ in stock. Explain stock levels
NUT (.250-28) 11-826708  9 11-826708 9
11-826708 9OEM Part 11-826708 9 - Nut - Priced Individually (more info) About Mercury Marine $1.00 $1.00 Add to shopping cart
7 in stock. Explain stock levels
S.S. Steel Locknut 18-3722-9
18-3722-9OEM Match 18-3722-9 - Lock Nut, 121731, 11-35888 (more info)
Replaces OEM #0121731
About Sierra Marine $14.95 $7.67 Add to shopping cart
Available to order:
Usually ships
within 8 days