Sierra Upper Drain Plug

Overview

The Sierra Upper Drain Plug (18-2244) is a reliable replacement for gear lube fill or vent screws in select MerCruiser and Mercury Marine applications. Designed with durability and compatibility in mind, this drain screw fits MerCruiser I, R, MR, Alpha One, TR, TRS, and all outboards with 3/8-16 non-magnetic screws. The included 18-2945 drain screw gasket ensures a secure, leak-free seal.

Key Features:

• Thread Size: 3/8"-16 for non-magnetic gear lube fill or vent screws.
• Compatible Applications: MerCruiser I, R, MR, Alpha One, TR, TRS, and Mercury Marine outboards.
• Includes Gasket: Comes with the 18-2945 drain screw gasket for dependable sealing.
• Interchangeable with Major Brands: Replaces OEM part numbers from Chrysler/Force, GLM, Mallory, MerCruiser Stern Drive, and Mercury Marine.

Interchangeable Part Numbers:

• Chrysler/Force/US Marine: F40109, 10-F50109, 10-79953A2, 10-79953
• GLM: 22420
• Mallory: 9-72650
• MerCruiser Stern Drive: 816610A2, 816610A1, 10-28634A1, 10-28634, 10-79953, 10-79953A2, 10-79953Q2, 10-79953Q04
• Mercury Marine: 10-20259, 10-79953Q04, 10-79953Q2, 10-79953A2, 10-79953, 10-28634, 10-28634A1

California Residents:

⚠ WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.