Description
Mercury Gearcase Seal/Washer Kit, Blue (8M0082880) for 5–20HP
Keep water out and gear lube in. This blue gearcase seal/washer kit is designed for select Mercury small-horsepower outboards and should be replaced whenever you change gear lube or if the existing seal shows wear or damage.
Applications
- 5 hp Mercury propane outboards — serial No. 0R936270 and above
- 8/9.9 hp Mercury 4-stroke outboards — serial No. 0R008146 and above
- 15–20 hp Mercury EFI 4-stroke & Mercury SeaPro — serial No. 0R833820 and above
- Use only where specified by the engine’s owner’s/service manual
Shipping & Returns
Fast shipping from our Wisconsin facility. Need help confirming fit by serial number? We’re here to help. Returns are easy—see our Return Policy.
Key Facts
- Brand: Mercury
- Part #: 8M0082880
- Color: Blue
- Function: Seals the gearcase to retain gear lube and keep water out
- Replace When: Changing gear lube or if the existing seal/washer is worn or damaged
- Compatible Lubricant: Use Mercury/Quicksilver gear lube
What’s Included
- 1 × Gearcase seal/washer (blue), Mercury P/N 8M0082880
Service Notes
- Confirm fitment by outboard model and serial number before installation
- Install a new seal/washer each time you service the gear lube to maintain proper sealing
- Follow the owner’s/service manual for drain/fill procedure and torque specifications
- Use only Mercury/Quicksilver-spec gear lube; dispose of used lubricant per local regulations