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Parts for MerCruiser 454 Mag. MPI Horizon (Gen. VI) GM 454 V-8 Cylinder Head & Rocker Cover

Ref. No. Part No. Description Manufacturer List Price Your Price Order
#1 802565 COVER-ROCKER (2 required per assembly)
COVER Rocker 802565 802565
802565OEM Part 802565 - Rocker Cover (more info) About Mercury Marine $154.92 $154.92 Add to shopping cart
Available to order:
Usually ships
within 8 days
#2 36-802566T CAP (2 required per assembly)
CAP-OIL FILL      O - Replaced by -845753T 1  
36-802566TThis part has been superseded. CAP-OIL FILL O - Replaced by -845753T 1
(more info)
    UnavailableUnavailable Parts
CAP 845753T 1 845753T 1
845753T 1OEM Part 845753T 1 - Oil Fill Cap (more info) About Mercury Marine $13.00 $13.00 Add to shopping cart
Available to order:
Usually ships
within 8 days
#3 27-811588 GASKET, Rocker Cover (2 required per assembly)
278M0092920 27-811588 27-811588
27-811588OEM Part 27-811588 - Gasket (more info) About Mercury Marine $141.67 $40.80 Add to shopping cart
9 in stock. Explain stock levels
ROCKER COVER GASKET  
27-8M0092920OEM Part 27-8M0092920 - ROCKER Cover Gasket (more info) About Mercury Marine $83.25 $83.25 Add to shopping cart
10+ in stock. Explain stock levels
ROCKER COVER GASKET 18-25002
18-25002OEM Match 18-25002 - Gasket 27-811588 (more info) About Sierra Marine $131.99 $107.39 Add to shopping cart
Available to order:
Usually ships
within 8 days
#4 10-811589 BOLT (1/4-20 X 5/8 IN.) (14 required per assembly)
BOLT (1/4-20 x 0. 10-811589 10-811589
10-811589OEM Part 10-811589 - Screw (more info) About Mercury Marine $15.30 $15.30 Add to shopping cart
Available to order:
Usually ships
within 8 days
#5 852003 PUSH ROD (8 required per assembly) (INTAKE)
PUSH ROD 852003 852003
852003OEM Part 852003 - Push Rod (more info) About Mercury Marine $32.50 $32.50 Add to shopping cart
Available to order:
Usually ships
within 8 days
#5 852004 PUSH ROD (8 required per assembly) (EXHAUST)
PUSH ROD 852004 852004
852004OEM Part 852004 - Push Rod (more info) About Mercury Marine $26.00 $26.00 Add to shopping cart
Available to order:
Usually ships
within 8 days
#6 816962 VALVE-EXHAUST (8 required per assembly) (STANDARD)
VALVE Exhaust 816962 816962
816962OEM Part 816962 - Exhaust Valve - Std (more info) About Mercury Marine $168.75 $168.75 Add to shopping cart
Available to order:
Usually ships
within 8 days
#6 816963T VALVE-EXHAUST (AR required per assembly) (.015 O.S.)
VALVE-EXH-015 OS 816963T 816963T
816963TOEM Part 816963T - Exhaust Valve - 015 OS (more info) About Mercury Marine $138.69 $138.69 Add to shopping cart
7 in stock. Explain stock levels
#7 821024T VALVE, Intake (8 required per assembly) (Standard Valve Stem)(2.250 In./ 57.15mm)
VALVE Intake 821024T 821024T
821024TOEM Part 821024T - Inlet Valve (more info) About Mercury Marine $80.92 $80.92 Add to shopping cart
Available to order:
Usually ships
within 8 days
#7 801877 VALVE-INTAKE (8 required per assembly) (Standard Valve Stem)(2.190 In. / 55.626mm)
VALVE Intake 801877 801877
801877OEM Part 801877 - Valve - Std - Inlet (more info) About Mercury Marine $77.83 $77.83 Add to shopping cart
Available to order:
Usually ships
within 8 days
#7 801878 VALVE-INTAKE (8 required per assembly) (.015 O.S. Valve Stem)(2.190 In. / 55.63mm)
VALVE-.015-INLET,NLA 801878 801878
801878OEM Part 801878 - Valve - .015- Inlet, NLA (more info) About Mercury Marine $108.00 $108.00 Add to shopping cart
10+ in stock. Explain stock levels
#8 845707 GUIDE (8 required per assembly)
GUIDE             O - Replaced by -881686 845707
845707This part has been superseded. GUIDE O - Replaced by -881686
(more info)
    UnavailableUnavailable Parts
GUIDE 881686 881686
881686OEM Part 881686 - Guide (more info) About Mercury Marine $13.30 $13.30 Add to shopping cart
Available to order:
Usually ships
within 8 days
#9 827644A 1 CAP ASSEMBLY-VALVE (16 required per assembly)
CAP ASSEMBLY Valv 827644A 1 827644A 1
827644A 1OEM Part 827644A 1 - Cap/Seal Assembly (more info) About Mercury Marine $67.75 $67.75 Add to shopping cart
Available to order:
Usually ships
within 8 days
#10 26-827645 SEAL-VALVE (16 required per assembly)
SEAL Valve 26-827645 26-827645
26-827645OEM Part 26-827645 - Seal (more info) About Mercury Marine $17.50 $14.99 Add to shopping cart
Available to order:
Usually ships
within 8 days
#11 24-801879T SPRING-VALVE (16 required per assembly)
SPRING Valve 24-801879T 24-801879T
24-801879TOEM Part 24-801879T - Spring (more info) About Mercury Marine $38.58 $38.58 Add to shopping cart
Available to order:
Usually ships
within 8 days
#12 28-54530 KEY (32 required per assembly)
KEY Note: must be ordered in multiples of 2 28-54530 28-54530
28-54530OEM Part 28-54530 - Key - Priced Individually (more info) About Mercury Marine $1.80 $1.80 Add to shopping cart
2 in stock. Explain stock levels
#13 811591T ARM-ROCKER (16 required per assembly)
ARM Rocker 811591T 811591T
811591TOEM Part 811591T - Rocker Arm (more info) About Mercury Marine $24.08 $24.08 Add to shopping cart
Available to order:
Usually ships
within 8 days
#14 850472 BALL UNIT (16 required per assembly)
BALL-ROCKER ARM 850472 850472
850472OEM Part 850472 - Ball-Rocker Arm (more info) About Mercury Marine $4.50 $4.50 Add to shopping cart
1 in stock. Explain stock levels
#15 10-811593 BOLT, Rocker Arm (16 required per assembly)
BOLT Rocker Arm 10-811593 10-811593
10-811593OEM Part 10-811593 - Bolt (more info) About Mercury Marine $10.60 $10.60 Add to shopping cart
Available to order:
Usually ships
within 8 days
#16 15-845669 SHIM, Valve Spring (.015) (AR required per assembly)
SHIM-.015 @2      O  
15-845669 SHIM-.015 @2 O
(more info)
    UnavailableUnavailable Parts
#17 938-827495T HEAD ASSEMBLY-CYLINDER (2 required per assembly)
ORD 8M0115141     O NLA  
938-827495T ORD 8M0115141 O NLA
(more info)
    UnavailableUnavailable Parts
#18 27-850470 GASKET-CYLINDER HEAD (2 required per assembly) (454 MAG MPI HORIZON)
GASKET            O - Replaced by 27-879150141 27-850470
27-850470This part has been superseded. GASKET O - Replaced by 27-879150141
(more info)
    UnavailableUnavailable Parts
GASKET-CYL HEAD 27-879150141 27-879150141
27-879150141OEM Part 27-879150141 - Cylinder Head Gasket (more info) About Mercury Marine $75.40 $64.57 Add to shopping cart
Available to order:
Usually ships
within 8 days
Gasket, Head 18-3887
18-3887OEM Match 18-3887 - Head Gasket 454 (more info)
Replaces OEM #3853511
About Sierra Marine $76.99 $61.61 Add to shopping cart
Available to order:
Usually ships
within 8 days
#18 27-811546 GASKET, Cylinder Head (2 required per assembly) (8.2L MPI)
GASKET            O - Replaced by 27-879150139 27-811546
27-811546This part has been superseded. GASKET O - Replaced by 27-879150139
(more info)
    UnavailableUnavailable Parts
GASKET-CYL HEAD 27-879150139 27-879150139
27-879150139OEM Part 27-879150139 - Cylinder Head Gasket (more info) About Mercury Marine $102.50 $87.76 Add to shopping cart
1 in stock. Explain stock levels
Head Gasket 18-3874
18-3874OEM Match 18-3874 - Head Gasket 502 (more info)
Replaces OEM #3853511
About Sierra Marine $126.99 $102.82 Add to shopping cart
Available to order:
Usually ships
within 8 days
#19 10-49106 BOLT, (2.00 Inch) (8 required per assembly)
SCREW             O - Replaced by 10-845706  
10-49106This part has been superseded. SCREW O - Replaced by 10-845706
(more info)
    UnavailableUnavailable Parts
SCREW             O - Replaced by 10-845706M 2  
10-845706This part has been superseded. SCREW O - Replaced by 10-845706M 2
(more info)
    UnavailableUnavailable Parts
ORD 8M0102366     O NLA  
10-845706M 2 ORD 8M0102366 O NLA
(more info)
    UnavailableUnavailable Parts
#20 10-845705 SCREW, (.438-14 x 4.060) (24 required per assembly)
ORD 8M0102366     O NLA  
10-845705 ORD 8M0102366 O NLA
(more info)
    UnavailableUnavailable Parts
#21 36-861124 TUBE-OIL FILL (1 required per assembly)
TUBE Oil Fill 36-861124 36-861124
36-861124OEM Part 36-861124 - Oil Fill Tube (more info) About Mercury Marine $9.60 $4.68 Add to shopping cart
10+ in stock. Explain stock levels
#22 25-29439 O-RING (1 required per assembly)
O-RING 25-29439 25-29439
25-29439OEM Part 25-29439 - O-Ring - Priced Individually (more info) About Mercury Marine $2.10 $2.10 Add to shopping cart
7 in stock. Explain stock levels
O-Ring 18-7156-9
18-7156-9OEM Match 18-7156-9 - (PK5) O-Ring 25-29439 (more info)
Replaces OEM #0309731
About Sierra Marine $14.95 $7.87 Add to shopping cart
Available to order:
Usually ships
within 8 days
#23 25-811553 GROMMET (2 required per assembly)
GROMMET 25-811553  
25-811553OEM Part 25-811553 - Grommet (more info) About Mercury Marine $25.42 $25.42 Add to shopping cart
Available to order:
Usually ships
within 8 days
#24 21-806603 VALVE-PCV (1 required per assembly)
VALVE PVC 21-806603 21-806603
21-806603OEM Part 21-806603 - PCV Valve (more info) About Mercury Marine $8.50 $8.50 Add to shopping cart
1 in stock. Explain stock levels
#25 32-861977 63 HOSE, (33.00 Inches Bulk) (TO INTAKE PLENUM) (1 required per assembly)
HOSE-33 INCH      O - Replaced by 32-8M0062321  
32-861977 63This part has been superseded. HOSE-33 INCH O - Replaced by 32-8M0062321
(more info)
    UnavailableUnavailable Parts
HOSE (33.00 Inche 32-8M0062321  
32-8M0062321OEM Part 32-8M0062321 - Hose -33 Inch (more info) About Mercury Marine $37.08 $37.08 Add to shopping cart
Available to order:
Usually ships
within 8 days
#26 54-816311T TIE STRAP, (8.00 Inches) (AR required per assembly)
TIE STRAP (8.00 I 54-816311T 54-816311T
54-816311TOEM Part 54-816311T - Tie Strap - Priced Individually (more info) About Mercury Marine $0.44 $0.44 Add to shopping cart
10+ in stock. Explain stock levels
#27 97850 ELBOW, 90 Degree, Breather (1 required per assembly)
ELBOW-BREATHER    O - Replaced by -97850T  
97850This part has been superseded. ELBOW-BREATHER O - Replaced by -97850T
(more info)
    UnavailableUnavailable Parts
ELBOW 90 Degree 97850T 97850T
97850TOEM Part 97850T - Elbow (more info) About Mercury Marine $3.80 $3.80 Add to shopping cart
Available to order:
Usually ships
within 8 days
#28 32-807498240 TUBING, (24.00 Inches Bulk) (TO FLAME ARRESTOR) (1 required per assembly) (8.2L MPI)
328M2001709 32-807498240  
32-807498240OEM Part 32-807498240 - Hose -24 Inch (more info) About Mercury Marine $31.98 $31.98 Add to shopping cart
8 in stock. Explain stock levels
HOSE              O - Replaced by 32-8M2012906  
32-8M2001709This part has been superseded. HOSE O - Replaced by 32-8M2012906
(more info)
    UnavailableUnavailable Parts
HOSE              O - Replaced by 32-8M0062669  
32-8M2012906This part has been superseded. HOSE O - Replaced by 32-8M0062669
(more info)
    UnavailableUnavailable Parts
HOSE .50 ID X 45. 32-8M0062669  
328M0062669OEM Part 328M0062669 - Hose (more info) About Mercury Marine $19.83 $19.83 Add to shopping cart
Available to order:
Usually ships
within 8 days
#28 32-807786 HOSE, Molded (TO FLAME ARRESTOR) (1 required per assembly)
HOSE-PCV          O NLA 32-807786
32-807786 HOSE-PCV O NLA
(more info)
    UnavailableUnavailable Parts
#29 16-805706 STUD (1 required per assembly) (454 MAG MPI HORIZON)
STUD 16-805706  
16-805706OEM Part 16-805706 - Stud (more info) About Mercury Marine $7.20 $7.20 Add to shopping cart
10+ in stock. Explain stock levels
#30 54-97224 J CLIP (1 required per assembly)
J CLIP 54-97224  
54-97224OEM Part 54-97224 - J Clip (more info) About Mercury Marine $7.40 $7.40 Add to shopping cart
3 in stock. Explain stock levels
#31 11-826709109 NUT, (.250-28) (1 required per assembly)
NUT (.250-28) Sta 11-826709109 11-826709109
11-826709109OEM Part 11-826709109 - Nut - Priced Individually (more info) About Mercury Marine $2.30 $2.30 Add to shopping cart
10+ in stock. Explain stock levels
#- 27-811572A94 GASKET SET-OVERHAUL (1 required per assembly) (454)
GASKET SET Overha 27-811572A94 27-811572A94
27-811572A94OEM Part 27-811572A94 - Gasket Set (more info) About Mercury Marine $1,300.00 $1,300.00 Add to shopping cart
Available to order:
Usually ships
within 8 days
#- 27-805396A92 GASKET SET-OVERHAUL (1 required per assembly) (8.2L)
GASKET SET Overha 27-805396A92 27-805396A92
27-805396A92OEM Part 27-805396A92 - Gasket Set (more info) About Mercury Marine $1,271.43 $1,271.43 Add to shopping cart
Available to order:
Usually ships
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