Why pay dealer markup? Get genuine Mercury Marine quality at discount pricing. This **NUT, GEAR HOUSING** delivers OEM reliability with savings up to 20% below retail.

Built to Mercury’s exacting factory standards, this gear assembly ensures reliable operation across all engine RPM ranges. Part number 87763 is manufactured to exact Mercury Marine factory specifications for precision installation and optimal performance. Constructed from premium marine-grade materials designed to withstand harsh saltwater and freshwater environments.

Genuine Mercury Marine part 87763 isn’t just a replacement – it’s an investment in your engine’s longevity. Factory engineering ensures optimal performance while cheap alternatives lead to repeated repairs.

FITS: 30-402HP MARINER, MERCURY

• Fits MARINER, MERCURY 30-402HP engines
• Compatible HP: 30HP, 35HP, 40HP, 45HP, 402HP
• Covers 24 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

30HP Models

• 30HP JET (Mariner): 0C159200-0G589999
• 30HP JET (Mercury): 0C159200-0G589999

35HP Models

• 35HP OUTBOARD (Mercury): 6445653-0B110788

40HP Models

• 40HP OUTBOARD (Mariner)
• 40HP OUTBOARD (Mercury)

45HP Models

• 45HP OUTBOARD (Mariner): 5531630-0B110788, 7143688-0A719280
• 45HP OUTBOARD (Mercury): 5531630-0B110788

402HP Models

• 402HP OUTBOARD (Mercury)

Not sure where to find your engine’s serial number? View our serial number location guide to quickly locate it on your Mercury engine.

Not sure if part 87763 fits your engine? Try our parts finder tool – it’s quick and easy. Need expert help? Contact us using the buttons at the bottom of this page – text, call, or email, whatever works best for you.

40+ years of marine expertise. Low prices, fast shipping – most orders placed by 1pm ship today.