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Parts for MerCruiser Race Engine and Drive 525 EFI Engine Components (Cylinder Head)

#1 845708A 7 COVER ASSEMBLY, Rocker Valve - Blue (1 required per assembly) - Port
845708A 7 - COVER ASSEMBLY Ro O - Replaced by -8M0050913
 

This part has been superseded.

845708A 7 - 845708A 7 - COVER ASSEMBLY Ro O [ More info ]
Unavailable
Replaced by -8M0050913
8M0050913 - COVER ASSEMBLY Ro O NLA
 

About Mercury Marine

OEM Part

8M0050913 - COVER ASSEMBLY Ro O NLA [ More info ]
Unavailable
#2 845708A 9 COVER ASSEMBLY, Rocker Valve - Blue (1 required per assembly) - Starboard
845708A 9 - COVER ASSEMBLY Ro O - Replaced by -8M0052328
 

This part has been superseded.

845708A 9 - 845708A 9 - COVER ASSEMBLY Ro O [ More info ]
Unavailable
Replaced by -8M0052328
COVER ASSY-STBD 8M0052328
 

About Mercury Marine

OEM Part

8M0052328 - Cover Assembly - Stbd [ More info ]

Add to shopping cart $380.48
Available to order: Usually ships within 8 days. Explain stock levels

#3 27-811588 GASKET, Rocker Cover (2 required per assembly)
278M0092920 27-811588
27-811588

About Mercury Marine

OEM Part

27-811588 - Gasket [ More info ]

Add to shopping cart $44.00
10+ in stock. Explain stock levels

ROCKER COVER GASKET
27-8M0092920

About Mercury Marine

OEM Part

27-8M0092920 - ROCKER Cover Gasket [ More info ]

Add to shopping cart $85.33
3 in stock. Explain stock levels

ROCKER COVER GASKET
18-25002

About Sierra Marine

OEM Match

18-25002 - Gasket 27-811588 [ More info ]

Add to shopping cart $131.99 $107.39
1 in stock. Explain stock levels

#4 10-39349 SCREW, (.312-18 x .750) Stainless Steel (2 required per assembly)
SCREW (.312-18 x .750) 10-39349
10-39349

About Mercury Marine

OEM Part

10-39349 - Screw - Priced Individually [ More info ]

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

#5 12-70132 WASHER, (.323 x .563 x .063) Stainless Steel (2 required per assembly)
12-70132 - WASHER (.323 x .5 O - Replaced by 12-8M0042642
12-70132

This part has been superseded.

12-70132 - 12-70132 - WASHER (.323 x .5 O [ More info ]
Unavailable
Replaced by 12-8M0042642
WASHER (.323 x .562 x . 12-8M0042642
12-8M0042642

About Mercury Marine

OEM Part

12-8M0042642 - Washer - Priced Individually [ More info ]

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

#6 25-26802 O-RING, (.424 x .103) (2 required per assembly)
O-RING (.424 x .103) 25-26802
25-26802

About Mercury Marine

OEM Part

25-26802 - O-Ring - Priced Individually [ More info ]

Add to shopping cart $2.90
10+ in stock. Explain stock levels

O-Ring
18-7180

About Sierra Marine

OEM Match

18-7180-9 - O-Ring (PK5 ) 925055 [ More info ]

Add to shopping cart $14.95 $10.08
1 in stock. Explain stock levels

#7 25-811553 GROMMET (2 required per assembly)
GROMMET 25-811553
 

About Mercury Marine

OEM Part

25-811553 - Grommet [ More info ]

Add to shopping cart $26.09
Available to order: Usually ships within 8 days. Explain stock levels

#8 97850 ELBOW, 90 Degree, Breather (2 required per assembly)
97850 - ELBOW 90 Degree   O - Replaced by -97850T
 

This part has been superseded.

97850 - 97850 - ELBOW 90 Degree O [ More info ]
Unavailable
Replaced by -97850T
ELBOW 90 Degree 97850T
97850T

About Mercury Marine

OEM Part

97850T - Elbow [ More info ]

Add to shopping cart $3.90
3 in stock. Explain stock levels

#9 54-816311T TIE STRAP, (8.00 Inches) (2 required per assembly)
TIE STRAP (8.00 Inches) 54-816311T
54-816311T

About Mercury Marine

OEM Part

54-816311T - Tie Strap, 8 Inches, Priced Individually [ More info ]

Add to shopping cart $0.44
10+ in stock. Explain stock levels

#10 54-858951 J CLIP (2 required per assembly)
J CLIP 54-858951
 

About Mercury Marine

OEM Part

54-858951 - J Clip [ More info ]

Add to shopping cart $4.80
Available to order: Usually ships within 8 days. Explain stock levels

#11 37-849950 DECAL, Oil Fill Cap (2 required per assembly)
DECAL Oil Fill Cap 37-849950
 

About Mercury Marine

OEM Part

37-849950 - Decal [ More info ]

Add to shopping cart $4.23
Available to order: Usually ships within 8 days. Explain stock levels

#12 36-845753T 1 CAP, Oil Fill (2 required per assembly)
CAP 845753T 1
845753T 1

About Mercury Marine

OEM Part

845753T 1 - Oil Fill Cap [ More info ]

Add to shopping cart $13.30
1 in stock. Explain stock levels

#13 54-42553 J CLIP (1 required per assembly)
J CLIP 54-42553
 

About Mercury Marine

OEM Part

54-42553 - J Clip [ More info ]

Add to shopping cart $4.30
Available to order: Usually ships within 8 days. Explain stock levels

#14 32-15894 31 TUBING, (20.00 Inches Bulk), Cut 2 Pieces - 8.50 Inches (AR required per assembly)
32-15894 31 - TUBING (20.00 Inc O - Replaced by 32-8M0086022
32-15894 31

This part has been superseded.

32-15894 31 - 32-15894 31 - TUBING (20.00 Inc O [ More info ]
Unavailable
Replaced by 32-8M0086022
HOSE 32-8M0086022
 

About Mercury Marine

OEM Part

32-8M0086022 - Tube-20 Inch [ More info ]

Add to shopping cart $26.17
1 in stock. Explain stock levels

#15 22-849999 FITTING, Tee (1 required per assembly)
FITTING 22-849999
 

About Mercury Marine

OEM Part

22-849999 - Fitting [ More info ]

Add to shopping cart $4.20
Available to order: Usually ships within 8 days. Explain stock levels

#17 11-35888 NUT, (.250-28) Stainless Steel (14 required per assembly)
NUT (.250-28) Stainless 11-35888
11-35888

About Mercury Marine

OEM Part

11-35888 - Nut - Priced Individually [ More info ]

Add to shopping cart $4.80 $1.92
10+ in stock. 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
Available to order: Usually ships within 8 days. Explain stock levels

#18 12-846673 WASHER, (.265 x .500 x .060) Stainless Steel (14 required per assembly)
WASHER (.265 x .500 x . 12-846673
 

About Mercury Marine

OEM Part

12-846673 - Washer [ More info ]

Add to shopping cart $0.80
Available to order: Usually ships within 8 days. Explain stock levels

#19 16-56766 STUD, (.250-20/.250-28 x 1.380) (14 required per assembly)
STUD (.250-20/.250-28 x 16-56766
16-56766

About Mercury Marine

OEM Part

16-56766 - Stud - Priced Individually [ More info ]

Add to shopping cart $2.50
10+ in stock. Explain stock levels

#20 54-15095 J CLIP (1 required per assembly)
J CLIP 54-15095
 

About Mercury Marine

OEM Part

54-15095 - J CLIP [ More info ]

Add to shopping cart $18.50 $15.84
Available to order: Usually ships within 8 days. Explain stock levels

#21 900-843944A04 CYLINDER HEAD ASSEMBLY, Starboard (1 required per assembly)
CYLINDER HEAD ASSEMBLY 900-843944A04
 

About Mercury Marine

OEM Part

900-843944A04 - Cylinder Head Assembly - Stbd [ More info ]

Add to shopping cart $1,991.86
Available to order: Usually ships within 8 days. Explain stock levels

#21 900-843944A05 CYLINDER HEAD ASSEMBLY, Port (1 required per assembly)
CYLINDER HEAD ASSEMBLY 900-843944A05
 

About Mercury Marine

OEM Part

900-843944A05 - Cylinder Head Assembly - Port [ More info ]

Add to shopping cart $1,991.86
Available to order: Usually ships within 8 days. Explain stock levels

#22 19-47463 EXPANSION PLUG (2 required per assembly)
EXPANSION PLUG 19-47463
 

About Mercury Marine

OEM Part

19-47463 - Plug [ More info ]

Add to shopping cart $8.40 $4.70
7 in stock. Explain stock levels

#23 10-8M0000463 SCREW, (.438-14 x 2.060) Black Oxide (8 required per assembly)
SCREW (.438-14 x 2.060) 10-8M0000463
10-8M0000463

About Mercury Marine

OEM Part

10-8M0000463 - Screw [ More info ]

Add to shopping cart $10.10
5 in stock. Explain stock levels

#24 12-841990 WASHER, Special - Black (32 required per assembly)
WASHER Special - Black 12-841990
 

About Mercury Marine

OEM Part

12-841990 - Washer [ More info ]

Add to shopping cart $1.30
Available to order: Usually ships within 8 days. Explain stock levels

#25 27-811546A03 GASKET KIT, Cylinder Head (2 required per assembly)
27-811546A03 - GASKET KIT Cylind O - Replaced by 27-811546A04
27-811546A03

This part has been superseded.

27-811546A03 - 27-811546A03 - GASKET KIT Cylind O [ More info ]
Unavailable
Replaced by 27-811546A04
GASKET KIT Cylinder Hea 27-811546A04
27-811546A04

About Mercury Marine

OEM Part

27-811546A04 - Gasket Kit [ More info ]

Add to shopping cart $195.33
Available to order: Usually ships within 8 days. Explain stock levels

#26 17-843931 PIN, Dowel, Cylinder Head Gasket Locator (4 required per assembly)
PIN Dowel 17-843931
 

About Mercury Marine

OEM Part

17-843931 - Pin -Dowel [ More info ]

Add to shopping cart $9.20
Available to order: Usually ships within 8 days. Explain stock levels

#27 10-99204 SCREW, (.437-14 x 1.00) Stainless Steel (1 required per assembly)
SCREW (.437-14 x 1.00) 10-99204
10-99204

About Mercury Marine

OEM Part

10-99204 - Screw [ More info ]

Add to shopping cart $3.70
1 in stock. Explain stock levels

#28 12-45176 WASHER, (.453 x .812 x .105) Stainless Steel (1 required per assembly)
WASHER (.453 x .812 x . 12-45176
12-45176

About Mercury Marine

OEM Part

12-45176 - Washer - Priced Individually [ More info ]

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

Washer
18-4858-9

About Sierra Marine

OEM Match

18-4858-9 - Washer, 12-45176, 10PK [ More info ]

Add to shopping cart $27.22 $17.96
8 in stock. Explain stock levels

#29 54-843142 J CLIP (1 required per assembly)
J CLIP 54-843142
 

About Mercury Marine

OEM Part

54-843142 - J Clip [ More info ]

Add to shopping cart $3.60
Available to order: Usually ships within 8 days. Explain stock levels

#30 10-8M0000482 SCREW, (.438-14 x 4.060) Black Oxide (14 required per assembly)
SCREW (.438-14 x 4.060) 10-8M0000482
10-8M0000482

About Mercury Marine

OEM Part

10-8M0000482 - Screw [ More info ]

Add to shopping cart $6.00
Available to order: Usually ships within 8 days. Explain stock levels

#30 10-8M0000467 SCREW, (.438-14 x 5.060) Black Oxide (10 required per assembly)
SCREW (.438-14 x 5.060) 10-8M0000467
10-8M0000467

About Mercury Marine

OEM Part

10-8M0000467 - Screw [ More info ]

Add to shopping cart $11.10
Available to order: Usually ships within 8 days. Explain stock levels

#31 843080 VALVE, Exhaust (8 required per assembly)
VALVE Exhaust 843080
843080

About Mercury Marine

OEM Part

843080 - Exhaust Valve [ More info ]

Add to shopping cart $119.79
Available to order: Usually ships within 8 days. Explain stock levels

#32 15-845669 SHIM, Valve Spring (.015) (AR required per assembly)
15-845669 - SHIM Valve Spring O
 

About Mercury Marine

OEM Part

15-845669 - SHIM Valve Spring O [ More info ]
Unavailable
#32 15-77624 SHIM, Valve Spring (.030) (AR required per assembly)
SHIM Valve Spring (.030 15-77624
 

About Mercury Marine

OEM Part

15-77624 - Shim -.030 [ More info ]

Add to shopping cart $3.50
Available to order: Usually ships within 8 days. Explain stock levels

#32 15-77625 SHIM, Valve Spring (.060) (AR required per assembly)
SHIM Valve Spring (.060 15-77625
 

About Mercury Marine

OEM Part

15-77625 - Shim -.060 [ More info ]

Add to shopping cart $2.19
Available to order: Usually ships within 8 days. Explain stock levels

#33 26-842755 SEAL, Valve, Intake And Exhaust (16 required per assembly)
SEAL Valve 26-842755
 

About Mercury Marine

OEM Part

26-842755 - Seal - Valve [ More info ]

Add to shopping cart $8.10
10+ in stock. Explain stock levels

#34 840678 SEAT, Spring (16 required per assembly)
SEAT Spring 840678
840678

About Mercury Marine

OEM Part

840678 - Seat - Spring [ More info ]

Add to shopping cart $11.42
Available to order: Usually ships within 8 days. Explain stock levels

#35 24-843081A01 SPRING/RETAINER KIT, (16 Per Kit) (1 required per assembly)
SPRING/RETAINER KIT (16 24-843081A01
 

About Mercury Marine

OEM Part

24-843081A01 - Spr/Ret Kit -16PCS [ More info ]

Add to shopping cart $1,168.95
Available to order: Usually ships within 8 days. Explain stock levels

#36 NSS NOT SOLD SEPARATE, Retainer (1 required per assembly)
NSS - NOT SOLD SEPARATE O
 

About Mercury Marine

OEM Part

NSS - NOT SOLD SEPARATE O [ More info ]
Unavailable
#37 843140 LOCK, Valve Stem (32 required per assembly)
843140 - LOCK Valve Stem   O - Replaced by -8M0042989
843140

This part has been superseded.

843140 - 843140 - LOCK Valve Stem O [ More info ]
Unavailable
Replaced by -8M0042989
LOCK-VALVE Note: must be ordered in multiples of 2 8M0042989
8M0042989

About Mercury Marine

OEM Part

8M0042989 - Lock - Valve - Priced Individually [ More info ]

Add to shopping cart $5.17
Available to order: Usually ships within 8 days. Explain stock levels

#38 821024T VALVE, Intake, Standard - 2.250 Diameter (8 required per assembly)
VALVE Intake 821024T
821024T

About Mercury Marine

OEM Part

821024T - Inlet Valve [ More info ]

Add to shopping cart $82.92
Available to order: Usually ships within 8 days. Explain stock levels

#39 848262 PUSH ROD, (7.550) (8 required per assembly) - Intake
PUSH ROD (7.550) 848262
848262

About Mercury Marine

OEM Part

848262 - Push Rod [ More info ]

Add to shopping cart $42.67
Available to order: Usually ships within 8 days. Explain stock levels

#39 848264 PUSH ROD, (8.550) (8 required per assembly) - Exhaust
PUSH ROD (8.550) 848264
848264

About Mercury Marine

OEM Part

848264 - Push Rod [ More info ]

Add to shopping cart $42.67
Available to order: Usually ships within 8 days. Explain stock levels

#40 840942 GUIDE, Pushrod (8 required per assembly)
GUIDE Pushrod 840942
840942

About Mercury Marine

OEM Part

840942 - Guide - Push Rod [ More info ]

Add to shopping cart $27.17
Available to order: Usually ships within 8 days. Explain stock levels

#41 845618T ROCKER ARM ASSEMBLY (16 required per assembly)
ROCKER ARM ASSEMBLY 845618T
845618T

About Mercury Marine

OEM Part

845618T - Rocker Arm Assembly [ More info ]

Add to shopping cart $97.57
Available to order: Usually ships within 8 days. Explain stock levels

#42 11-848610 NUT, Rocker Arm Valve (16 required per assembly)
11-848610 - NUT               O - Replaced by 11-8M0043537
11-848610

This part has been superseded.

11-848610 - 11-848610 - NUT O [ More info ]
Unavailable
Replaced by 11-8M0043537
11-8M0043537 - NUT               O
 

About Mercury Marine

OEM Part

11-8M0043537 - NUT O [ More info ]
Unavailable
#43 16-95820 STUD, Rocker Arm Valve (8 required per assembly) - Intake
STUD Rocker Arm Valve 16-95820
16-95820

About Mercury Marine

OEM Part

16-95820 - Stud [ More info ]

Add to shopping cart $10.33
1 in stock. Explain stock levels

#43 16-843129 STUD, Rocker Arm Valve (8 required per assembly) - Exhaust
STUD Rocker Arm Valve 16-843129
16-843129

About Mercury Marine

OEM Part

16-843129 - Stud [ More info ]

Add to shopping cart $13.90
Available to order: Usually ships within 8 days. Explain stock levels

#- 27-843073A06 GASKET/SEAL SET, Engine Overhaul (1 required per assembly) - NOTE: See Gasket/Seal Set - Engine Overhaul Section For Complete Parts Listing
GASKET/SEAL SET Engine 27-843073A06
27-843073A06

About Mercury Marine

OEM Part

27-843073A06 - Gasket/Seal Set [ More info ]

Add to shopping cart $951.21
Available to order: Usually ships within 8 days. Explain stock levels

#- 841178A05 PARTIAL ENGINE ASSEMBLY (1 required per assembly)
PARTIAL ENGINE ASSEMBLY 841178A05
 

About Mercury Marine

OEM Part

841178A05 - Partial - 525 Efi [ More info ]

Add to shopping cart $17,186.38
Available to order: Usually ships within 8 days. Explain stock levels