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Parts for MerCruiser Race Engine and Drive 525 EFI Electrical Components (Starter & Alternator)

Engine Diagram

Ref. No. Part No. Description Manufacturer List Price Your Price Order
#1 840935 1 BRACKET, Alternator/Power Steering Mount (1 required per assembly)
BRACKET           O - Replaced by -8M0050829  
840935 1This part has been superseded. BRACKET O - Replaced by -8M0050829
(more info)
    UnavailableUnavailable Parts
BRACKET 8M0050829  
8M0050829OEM Part 8M0050829 - Bracket (more info) About Mercury Marine $222.05 $222.05 Add to shopping cart
Available to order:
Usually ships
within 8 days
#2 12-856774 WASHER, (.406 x .750 x .105) Stainless Steel (1 required per assembly)
WASHER (.406 x .7 12-856774  
12-856774OEM Part 12-856774 - Washer (more info) About Mercury Marine $1.50 $1.50 Add to shopping cart
1 in stock. Explain stock levels
#3 10-825427 SCREW, (.437-14 x 1.250) Stainless Steel (1 required per assembly)
SCREW (.437-14 x 10-825427 10-825427
10-825427OEM Part 10-825427 - Screw (more info) About Mercury Marine $4.70 $4.70 Add to shopping cart
10+ in stock. Explain stock levels
#5 10-65210 SCREW, (.375-16 x 1.00) (1 required per assembly) - Non Power Steering Models
SCREW (.375-16 x 10-65210 10-65210
10-65210OEM Part 10-65210 - Screw - Priced Individually (more info) About Mercury Marine $1.90 $1.90 Add to shopping cart
Available to order:
Usually ships
within 8 days
#6 16-59579 STUD, (.437-14/.437-20 x 2.812) (1 required per assembly)
STUD (.437-14/.43 16-59579 16-59579
16-59579OEM Part 16-59579 - Stud (more info) About Mercury Marine $5.90 $5.90 Add to shopping cart
10+ in stock. Explain stock levels
#7 16-57920 3 STUD, (.437-14/.437-20 x 2.060) (1 required per assembly)
STUD (.437-14/.43 16-57920  3  
16-57920 3OEM Part 16-57920 3 - Stud (more info) About Mercury Marine $5.50 $5.50 Add to shopping cart
6 in stock. Explain stock levels
#8 12-45176 WASHER, (.453 x .812 x .105) Stainless Steel (2 required per assembly)
WASHER (.453 x .8 12-45176 12-45176
12-45176OEM Part 12-45176 - Washer - Priced Individually (more info) About Mercury Marine $1.10 $1.10 Add to shopping cart
10+ in stock. Explain stock levels
Washer 18-4858-9
18-4858-9OEM Match 18-4858-9 - Washer, 12-45176, 10PK (more info) About Sierra Marine $27.22 $17.96 Add to shopping cart
2 in stock. Explain stock levels
#9 11-859135 NUT, (.437-20) Brass/Nickel Plated (2 required per assembly)
NUT (.437-20) Bra 11-859135 11-859135
11-859135OEM Part 11-859135 - Nut - Priced Individually (more info) About Mercury Marine $4.20 $4.20 Add to shopping cart
10+ in stock. Explain stock levels
#10 23-66995 2 SPACER, (.410 x 1.00 x .500) Aluminum - Black (2 required per assembly) - Non Power Steering Models
SPACER (.410 x 1. 23-66995  2  
23-66995 2OEM Part 23-66995 2 - Spacer (more info) About Mercury Marine $31.84 $31.84 Add to shopping cart
Available to order:
Usually ships
within 8 days
#11 849297T 1 BRACKET, Idler Pulley (1 required per assembly) - Non Power Steering Models
BRACKET Idler Pul 849297T 1 849297T 1
849297T 1OEM Part 849297T 1 - Bracket (more info) About Mercury Marine $172.25 $172.25 Add to shopping cart
Available to order:
Usually ships
within 8 days
#13 10-841154 SCREW, (.375-16 x 3.375) (2 required per assembly) - Non Power Steering Models
SCREW (.375-16 x 10-841154 10-841154
10-841154OEM Part 10-841154 - Screw (more info) About Mercury Marine $7.69 $7.69 Add to shopping cart
Available to order:
Usually ships
within 8 days
#14 849296T PULLEY ASSEMBLY, Idler - Black (1 required per assembly) - Non Power Steering Models
PULLEY            O - Replaced by -864625T 849296T
849296TThis part has been superseded. PULLEY O - Replaced by -864625T
(more info)
    UnavailableUnavailable Parts
PULLEY 864625T 864625T
864625TOEM Part 864625T - Idler Pulley (more info) About Mercury Marine $40.83 $40.83 Add to shopping cart
Available to order:
Usually ships
within 8 days
#15 10-821301 30 SCREW, (M10 x 30) (1 required per assembly) - Non Power Steering Models
SCREW (M10 x 30) 10-821301 30 10-821301 30
10-821301 30OEM Part 10-821301 30 - Screw (more info) About Mercury Marine $15.20 $15.20 Add to shopping cart
Available to order:
Usually ships
within 8 days
#16 43-818381 2 PINION STUD, (.437-20) Stainless Steel (1 required per assembly)
PINION STUD (.437 43-818381  2 43-818381  2
43-818381 2OEM Part 43-818381 2 - Pinion Stud (more info) About Mercury Marine $15.70 $15.70 Add to shopping cart
Available to order:
Usually ships
within 8 days
#17 842443 1 BRACKET, Tensioner (1 required per assembly)
BRACKET           O - Replaced by -8M0050739  
842443 1This part has been superseded. BRACKET O - Replaced by -8M0050739
(more info)
    UnavailableUnavailable Parts
ORD 8M0065011     O NLA  
8M0050739 ORD 8M0065011 O NLA
(more info)
    UnavailableUnavailable Parts
BRACKET 8M0065011  
8M0065011OEM Part 8M0065011 - Bracket (more info) About Mercury Marine $114.13 $114.13 Add to shopping cart
Available to order:
Usually ships
within 8 days
#19 10-99204 SCREW, (.437-14 x 1.00) Stainless Steel (1 required per assembly)
SCREW (.437-14 x 10-99204 10-99204
10-99204OEM Part 10-99204 - Screw (more info) About Mercury Marine $3.60 $3.60 Add to shopping cart
1 in stock. Explain stock levels
#20 807757T PULLEY ASSEMBLY, Idler - Black, Idler (1 required per assembly)
PULLEY ASSEMBLY I 807757T 807757T
807757TOEM Part 807757T - Idler Pulley (more info) About Mercury Marine $40.92 $40.92 Add to shopping cart
Available to order:
Usually ships
within 8 days
Pulley, Composite 18-6457
18-6457OEM Match 18-6457 - Pulley, 807757T (more info) About Sierra Marine $41.99 $34.01 Add to shopping cart
5 in stock. Explain stock levels
#22 845117 BUSHING (1 required per assembly)
BUSHING 845117 845117
845117OEM Part 845117 - Bushing (more info) About Mercury Marine $18.21 $18.21 Add to shopping cart
Available to order:
Usually ships
within 8 days
#24 10-87302 SCREW, (.375-16 x 5.00) Stainless Steel (1 required per assembly)
SCREW (.375-16 x 10-87302  
10-87302OEM Part 10-87302 - Bolt, NLA (more info) About Mercury Marine $8.40 $8.40 Add to shopping cart
10+ in stock. Explain stock levels
#25 10-841118 SCREW, (.437-14 x 5.50) Stainless Steel (1 required per assembly)
SCREW (.437-14 x 10-841118 10-841118
10-841118OEM Part 10-841118 - Screw (more info) About Mercury Marine $10.13 $10.13 Add to shopping cart
Available to order:
Usually ships
within 8 days
#26 85-66659 BOOT, Insulator - Black (2 required per assembly)
BOOT Insulator - 85-66659  
85-66659OEM Part 85-66659 - Boot (Black) (more info) About Mercury Marine $6.40 $6.40 Add to shopping cart
Available to order:
Usually ships
within 8 days
#27 11-40138 6 NUT, (M6) Stainless Steel (2 required per assembly)
NUT (M6) Stainles 11-40138  6  
11-40138 6OEM Part 11-40138 6 - Nut - Priced Individually (more info) About Mercury Marine $3.30 $3.30 Add to shopping cart
7 in stock. Explain stock levels
#28 12-846673 WASHER, (.265 x .500 x .060) Stainless Steel (2 required per assembly)
WASHER (.265 x .5 12-846673  
12-846673OEM Part 12-846673 - Washer (more info) About Mercury Marine $0.80 $0.80 Add to shopping cart
Available to order:
Usually ships
within 8 days
#29 11-826709 10 NUT, (.312-18) Stainless Steel (1 required per assembly)
NUT (.312-18) Sta 11-826709 10  
11-826709 10OEM Part 11-826709 10 - Nut - Priced Individually (more info) About Mercury Marine $4.90 $4.90 Add to shopping cart
Available to order:
Usually ships
within 8 days
#30 12-F506186 WASHER, (.340 x .734 x .105) Stainless Steel (2 required per assembly)
WASHER (.340 x .7 12-F506186  
12-F506186OEM Part 12-F506186 - Washer (more info) About Mercury Marine $3.90 $3.90 Add to shopping cart
Available to order:
Usually ships
within 8 days
#31 23-841940 BUSHING, Flanged (1 required per assembly)
BUSHING Flanged 23-841940  
23-841940OEM Part 23-841940 - Bushing (more info) About Mercury Marine $42.78 $42.78 Add to shopping cart
Available to order:
Usually ships
within 8 days
#32 863077T ALTERNATOR ASSEMBLY, Black, Service Complete (1 required per assembly)
ALTERNATOR ASSEMB 863077T 863077T
863077TOEM Part 863077T - Alternator (Black) (more info) About Mercury Marine $340.00 $340.00 Add to shopping cart
Available to order:
Usually ships
within 8 days
Alternator 18-6298
18-6298OEM Match 18-6298 - Alternator, 862031T (more info) About Sierra Marine $284.49 $224.62 Add to shopping cart
1 in stock. Explain stock levels
ALTERNATOR-REMAN     863077R01 863077R01
863077R01OEM Part 863077R01 - Alternator- Remanufactured (more info) About Mercury Marine $299.92 $299.92 Add to shopping cart
Available to order:
Usually ships
within 8 days
ALTERNATOR 20815
20815OEM Match 20815 - Alternator, 863077T (more info) About Arco Electrical Products $246.95 $217.56 Add to shopping cart
Available to order:
Usually ships
within 8 days
#33 10-39001 SCREW, (.312-18 x 4.50) (1 required per assembly)
SCREW (.312-18 x 10-39001 10-39001
10-39001OEM Part 10-39001 - Screw (more info) About Mercury Marine $5.30 $5.30 Add to shopping cart
Available to order:
Usually ships
within 8 days
#34 10-821550 25 SCREW, (M8 x 25) Stainless Steel (1 required per assembly)
SCREW (M8 x 25 MM 10-821550 25 10-821550 25
10-821550 25OEM Part 10-821550 25 - Screw - Priced Individually (more info) About Mercury Marine $2.10 $2.10 Add to shopping cart
2 in stock. Explain stock levels
#35 50-8M8021116 STARTER MOTOR ASSEMBLY, Service Complete (1 required per assembly)
STARTER MOTOR ASS 50-8M8021116 50-8M8021116
50-8M8021116OEM Part 50-8M8021116 - Starter Assembly (more info) About Mercury Marine $375.75 $375.75 Add to shopping cart
Available to order:
Usually ships
within 8 days
STARTER 18-6946
18-6946OEM Match 18-6946 - Starter 18-6946 (more info) About Sierra Marine $349.99 $272.60 Add to shopping cart
Available to order:
Usually ships
within 8 days
#36 10-805343 2 SCREW, (.375-16 x 4.33) (2 required per assembly)
SCREW (.375-16 x 10-805343  2 10-805343  2
10-805343 2OEM Part 10-805343 2 - Bolt (more info) About Mercury Marine $11.70 $11.70 Add to shopping cart
Available to order:
Usually ships
within 8 days
#37 809463A 1 SOLENOID KIT (1 required per assembly)
SOLENOID KIT 809463A 1 809463A 1
809463A 1OEM Part 809463A 1 - Solenoid Kit (more info) About Mercury Marine $149.58 $149.58 Add to shopping cart
1 in stock. Explain stock levels
Solenoid 18-5811
18-5811OEM Match 18-5811 - Solenoid, 809463A1 (more info)
Replaces OEM #3850216
About Sierra Marine $72.94 $58.63 Add to shopping cart
4 in stock. Explain stock levels
SOLENOIDS SW463
SW463OEM Match SW463 - Solenoid, 809463A1, 3850216 (more info)
Replaces OEM #3850216
About Arco Electrical Products $36.95 $32.29 Add to shopping cart
5 in stock. Explain stock levels
#38 15-817272 1 SHIM, Special (1 required per assembly)
SHIM 15-817272  1  
15-817272 1OEM Part 15-817272 1 - Shim (more info) About Mercury Marine $10.60 $10.60 Add to shopping cart
Available to order:
Usually ships
within 8 days
#39 88-79023A90 FUSE ASSEMBLY, 90 Ampere (1 required per assembly)
8879023T90 88-79023A90 88-79023A90
88-79023A90OEM Part 88-79023A90 - Fuse Assembly -90 AMP (more info) About Mercury Marine $26.00 $26.00 Add to shopping cart
3 in stock. Explain stock levels
FUSE ASSEMBLY 90 88-79023T90 88-79023T90
88-79023T90OEM Part 88-79023T90 - Fuse Assembly -90 Amp (more info) About Mercury Marine $24.67 $24.67 Add to shopping cart
4 in stock. Explain stock levels
#40 11-826709109 NUT, (.250-28) Stainless Steel (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
#41 11-40138 8 NUT, (M8) Stainless Steel (1 required per assembly)
NUT (M8) Stainles 11-40138  8  
11-40138 8OEM Part 11-40138 8 - Nut - Priced Individually (more info) About Mercury Marine $2.15 $2.15 Add to shopping cart
5 in stock. Explain stock levels
#42 13-26996 LOCKWASHER, (#10) Stainless Steel (1 required per assembly)
LOCKWASHER (#10) 13-26996  
13-26996OEM Part 13-26996 - LockWasher - Priced Individually (more info) About Mercury Marine $0.84 $0.84 Add to shopping cart
10+ in stock. Explain stock levels
#43 11-40021 1 NUT, (M5) Stainless Steel (1 required per assembly)
NUT (M5) Stainles 11-40021  1 11-40021  1
11-40021 1OEM Part 11-40021 1 - Nut (more info) About Mercury Marine $2.40 $2.40 Add to shopping cart
10+ in stock. Explain stock levels
#44 85-79695 BOOT, Insulator - Black (1 required per assembly)
8579695T 85-79695  
85-79695OEM Part 85-79695 - Boot (Black) (more info) About Mercury Marine $1.90 $1.90 Add to shopping cart
9 in stock. Explain stock levels
BOOT Insulator (B 85-79695T  
85-79695TOEM Part 85-79695T - Insulator Boot (more info) About Mercury Marine $3.90 $3.90 Add to shopping cart
Available to order:
Usually ships
within 8 days
#45 85-830233 BOOT, Insulator - Red (1 required per assembly)
BOOT Insulator - 85-830233  
85-830233OEM Part 85-830233 - Boot (red) (more info) About Mercury Marine $3.20 $3.20 Add to shopping cart
Available to order:
Usually ships
within 8 days
#46 85-880787 BOOT, Insulator - Yellow (1 required per assembly)
BOOT Insulator - 85-880787  
85-880787OEM Part 85-880787 - Boot (Yellow) (more info) About Mercury Marine $3.60 $3.60 Add to shopping cart
Available to order:
Usually ships
within 8 days