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Parts for Mercury Mark & Kiekhaefer Mark 25, 25E Cylinder Block

Engine Diagram

Ref. No. Part No. Description Manufacturer List Price Your Price Order
#1 811-467A 1 CYLINDER BLOCK ASSEMBLY (1,1,1,1,1, required per assembly)
CYLINDER BLOCK    O NLA  
811-467A 1 CYLINDER BLOCK O NLA
(more info)
    UnavailableUnavailable Parts
#4 16-23740 STUD, CYLINDER BLOCK TO CRANKCASE ( 1 3/32) (1,1,1,1,1, required per assembly)
STUD              O - Replaced by 16-65865  
16-23740This part has been superseded. STUD O - Replaced by 16-65865
(more info)
    UnavailableUnavailable Parts
STUD @2           O NLA  
16-65865 STUD @2 O NLA
(more info)
    UnavailableUnavailable Parts
#2 & 3 16-20956 STUD, DRIVE SHAFT HOUSING TO POWERHEAD (4,4,4,4,4, required per assembly)
STUD @3           O NLA  
16-20956 STUD @3 O NLA
(more info)
    UnavailableUnavailable Parts
#4 16-20525 STUD, CYLINDER BLOCK TO CRANKCASE ( 1 5/16) (5,5,5,5,5, 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 10-24222 SCREW, MANIFOLD COVER (7,7,7,7,7, required per assembly)
SCREW             O - Replaced by 10-28713  
10-24222This part has been superseded. SCREW O - Replaced by 10-28713
(more info)
    UnavailableUnavailable Parts
SCREW,NLA 10-28713  
10-28713OEM Part 10-28713 - Screw, NLA (more info) About Mercury Marine $3.00 $3.00 Add to shopping cart
10+ in stock. Explain stock levels
#6 20539 COVER, EXHAUST MANIFOLD (1,,1,,1,1 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
#6 25141 COVER, EXHAUST MANIFOLD (,1,,1,, required per assembly)
COVER             O NLA  
25141 COVER O NLA
(more info)
    UnavailableUnavailable Parts
#7 27-20538 GASKET, MANIFOLD COVER TO BAFFLE PLATE (1,1,1,1,1, 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 (1,1,1,1,1, required per assembly)
PLATE             O NLA  
20537 PLATE O NLA
(more info)
    UnavailableUnavailable Parts
#9 27-20536 GASKET, CYLINDER BLOCK TO MANIFOLD PLATE (1,1,1,1,1, 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
#11 1002-63A 1 CYLINDER BLOCK COVER ASSEMBLY (1,1,1,1,1, required per assembly)
COVER ASSY        O NLA  
1002-63A 1 COVER ASSY O NLA
(more info)
    UnavailableUnavailable Parts
#10 23-20528 BUSHING, COWL MOUNTING (2,2,2,2,2, required per assembly)
BUSHING           O - Replaced by 23-26348  
23-20528This part has been superseded. BUSHING O - Replaced by 23-26348
(more info)
    UnavailableUnavailable Parts
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,,7,,7,7 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) (1,1,1,1,1, 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 (1,1,1,1,1, required per assembly)
CLIP              O NLA  
54-20534 CLIP O NLA
(more info)
    UnavailableUnavailable Parts
#15 10-20532 SCREW, COVER TO CYLINDER BLOCK (8,8,8,8,8, 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 (1,1,1,1,1, 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
#19 25206 COVER, TRANSFER PORT (2,2,2,2,2, required per assembly)
COVER,NLA 25206  
25206OEM Part 25206 - 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 (2,2,2,2,2, 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 (1,1,1,1,1, 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 13-20147 LOCKWASHER, REAR BRACKET MOUNTING SCREW (2,,2,,2,2 required per assembly)
LOCKWASHER 13-20147  
13-20147OEM Part 13-20147 - LockWasher (more info) About Mercury Marine $0.05 $0.05 Add to shopping cart
Available to order:
Usually ships
within 8 days
#24 10-20542 SCREW, REAR BRACKET MOUNTING (2,,2,,2,2 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 (1,1,1,1,1, required per assembly)
GASKET @5         O NLA  
27-21173 GASKET @5 O NLA
(more info)
    UnavailableUnavailable Parts
#28 12-20346 WASHER, TOP COWL MOUNTING STUD (LARGE) (2,2,2,2,2, 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
#-- 12-20583 WASHER, TOP COWL MOUNTING STUD (SPACER) (2,2,2,2,2, required per assembly)
WASHER Note: must be ordered in multiples of 5 12-20583  
12-20583OEM Part 12-20583 - Washer - Priced Individually (more info) About Mercury Marine $1.10 $1.10 Add to shopping cart
10+ in stock. Explain stock levels
#29 11-20361 NUT, TOP COWL MOUNTING STUD (4,4,4,4,4, 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