Sierra Head Gasket 18-3841-2, Replaces GLM 34010, Evinrude/Johnson 203130

The Sierra 18-3841-2 Head Gasket is a replacement head gasket engineered to meet or exceed the quality of the original equipment part it replaces. It seals the mating surface between the cylinder head and the powerhead block, maintaining proper compression and preventing coolant or combustion leakage on applicable outboard engines. Each unit ships as a single gasket, ready to install during a head gasket replacement, top-end rebuild, or routine maintenance service.

This gasket is built to Sierra's quality standard for marine engine components, giving boat owners and marine technicians a dependable alternative to sourcing the original manufacturer part. It is designed as a direct equivalent, cross-referencing to GLM 34010 and Evinrude/Johnson 203130, so it fits in place of those OEM and aftermarket numbers without modification.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3841-2
• Item Type: Head Gasket
• Included Components: Head Gasket
• Unit Count: 1 Count
• Weight: 0.12 pounds
• UPC: 808282194031

Fitment

• Cross-references to GLM 34010
• Cross-references to Evinrude/Johnson 203130

Replaces (OEM)

• GLM 34010
• Evinrude/Johnson 203130

Frequently Asked Questions

What does the Sierra 18-3841-2 Head Gasket fit? The Sierra 18-3841-2 Head Gasket cross-references to GLM 34010 and Evinrude/Johnson 203130, so it is a direct equivalent for applications calling for either of those part numbers.

Is the Sierra 18-3841-2 the same as GLM 34010? Yes, GLM 34010 is a listed cross-reference for the Sierra 18-3841-2 Head Gasket, meaning the two part numbers are equivalent for fitment purposes.

Does 18-3841-2 replace Evinrude/Johnson 203130? Yes, Evinrude/Johnson 203130 is one of the OEM numbers that the Sierra 18-3841-2 Head Gasket replaces.

How many gaskets come in one order of part 18-3841-2? One order includes a single Head Gasket, listed as a unit count of 1.

How much does the Sierra 18-3841-2 Head Gasket weigh? It weighs 0.12 pounds.

Is the Sierra 18-3841-2 an OEM part or aftermarket? The 18-3841-2 is a Sierra-brand replacement gasket built to meet or exceed the quality of the original equipment part it replaces, rather than being sourced from the original engine manufacturer.

What is included when I order the 18-3841-2? The order includes one Sierra Head Gasket, part number 18-3841-2, with no additional hardware or components.

Can I use the 18-3841-2 gasket for a head gasket replacement job? Yes, the Sierra 18-3841-2 is designed as a head gasket replacement part, sealing the cylinder head to the powerhead during a gasket swap or top-end service.

What is the UPC for the Sierra 18-3841-2 Head Gasket? The UPC for this Sierra Head Gasket is 808282194031.

Will the Sierra 18-3841-2 work if my parts book lists 203130 instead? Yes, 203130 (Evinrude/Johnson) is a direct cross-reference to the Sierra 18-3841-2 Head Gasket, so it will fit the same application.