SIERRA GM Valve Stem Seal – 18-0518

Description

SIERRA GM Valve Stem Seal – 18-0518

A replacement valve-stem oil seal for specified GM-based marine engines used across MerCruiser, OMC and Volvo Penta packages.

• Application: Most early inline 4- and 6-cylinder GM marine engines and specified GM 305/350 CID applications.
• Primary function: Valve stem seal
• Key specification: Outside diameter – 0.394 in.
• OEM / aftermarket cross-reference: Mercruiser Stern Drive: 26-34217, FI1100152; OMC Stern Drive: 3853132, 3854956, 914323; Volvo Penta: 3853132, 3854956, 914323; MerCruiser: 26-34217, FI1100152; OMC: 3853132, 3854956, 914323
• Verify mating surfaces and follow the engine or drive service procedure during installation.

This part is application-specific. Confirm the OEM number and engine or drive configuration before installation.

Application: Most early inline 4- and 6-cylinder GM marine engines and specified GM 305/350 CID applications.

Specifications

• Component: Valve stem seal
• Outside diameter: 0.394 in.
• Shaft size: 0.282 in.
• Width: 0.083 in.

Interchange / Replaces

• Mercruiser Stern Drive: 26-34217, FI1100152
• OMC Stern Drive: 3853132, 3854956, 914323
• Volvo Penta: 3853132, 3854956, 914323
• MerCruiser: 26-34217, FI1100152
• OMC: 3853132, 3854956, 914323