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

Fitting 863840

$21.23 $23.59
You save $2.36 (10%)
Cross ship
Mercury Marine logo

Product Description

Mercury factory part. Search for more factory parts & parts diagrams.
Our verified social media accounts

Beware of impersonators

Refresh
Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.