SIERRA Mercury / MerCruiser 3/8-16 Gear Lube Drain / Vent Plug – 18-2244

Description

SIERRA Mercury / MerCruiser 3/8-16 Gear Lube Drain / Vent Plug – 18-2244

Sierra 18-2244 is a non-magnetic 3/8-16 gear-lube fill, drain or vent screw used across numerous Mercury outboards and MerCruiser stern drives. It replaces a broad family of Mercury/MerCruiser 10-79953 and related plug numbers.

• Replacement gearcase oil fill/drain/vent plug.
• Thread: 3/8-16 UNC.
• Non-magnetic style for applications that specify this plug design.
• Cataloged across MerCruiser I/R/MR/Alpha One/TR/TRS and many Mercury outboard gearcases.
• Install with the correct sealing washer/gasket specified for the gearcase and inspect threads for damage.

For marine drive and engine service parts, fitment can vary by model, serial number, gear ratio, casting and prior service history. Compare the original OEM number and physical configuration before installation, and replace related seals, bearings, locking hardware or cable components when their condition requires it.

Specifications

• Manufacturer: Sierra
• Part Number: 18-2244
• Application: MerCruiser I, R, MR, Alpha One, TR and TRS drives plus Mercury/Mariner outboards using 3/8-16 non-magnetic gear-lube fill/vent screws.
• Thread: 3/8-16 UNC
• Part Type: Gear-lube fill/drain/vent plug
• Style: Non-magnetic
• Application: Mercury outboard / MerCruiser stern drive

Interchange / OEM References

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