PREPARE FOR WINTER: 10-50% discount on all OEM parts!

Unless prohibited by manufacturer. Does not include aftermarket or Crowley Marine branded products. Priced as marked.

Contact Us
Overstock
Up to 50% off
Search Over 1 Million OEM Parts
Easy-to-use  parts diagrams Best price  guarantee Expert  live support 50+ years  of serving boaters Huge selection of OEM parts  -  from 1950 to 2026 Most parts in stock  -  Same day fulfillment
Most parts in stock- Same day fulfillment
Where is my model number?

Select your engine to find guaranteed-fit parts:

Mercury Marine

Gear Housing Assembly 8866A18

Price not available
No longer available
  • This is an OEM part manufactured by Mercury Marine
  • 30 day return policy
    •
Parts included in this kit
Mercury Marine logo

Product Description

Mercury factory part.
Our verified social media accounts

Beware of impersonators

Refresh

Parts included in this kit

Please note: Some of the included items may not be available for purchase separately and won't be listed here.

Name SKU Brand
(.437-14/.437-20 x 2.060) Stud 579203 Mercury Marine
Roller Bearing 86754 Mercury Marine
Seal 455771 Mercury Marine
ANODE ASSEMBLY KIT 76214A5 Mercury Marine
(.437-14 x 1.750) Screw 806327 Mercury Marine
(.625 Outside Diameter) Seal 805344 Mercury Marine
Lockwasher 806210 Mercury Marine
O-Ring 33465 Mercury Marine
Plate Assembly-Exhaust 805702A1 Mercury Marine
Drain Plug Kit 67892A1 Mercury Marine
Refresh
Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.