Sierra 18-2952 Head Gasket, Replaces 203034, for Johnson/Evinrude 7.5 HP (1957-1958) Outboard Motors

The Sierra 18-2952 Head Gasket is a replacement head gasket engineered for Johnson/Evinrude 7.5 HP outboard motors from 1957-1958. It seals the cylinder head to the powerhead block, maintaining proper compression and preventing coolant or combustion leaks between mating surfaces. This gasket is a direct interchange for the OEM Johnson/Evinrude part number 203034, making it a straightforward replacement when rebuilding or servicing the powerhead.

Sierra manufactures this gasket to meet or exceed the specifications of the original equipment part it replaces, so fit and sealing performance match what the engine was designed around. It is sold as a single unit and is lightweight at 0.05 pounds, consistent with a compact 7.5 HP powerhead application. As with all Sierra parts, it is backed by Sierra's standard customer satisfaction warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2952
• Product Type: Head Gasket
• Weight: 0.05 pounds
• Unit Count: 1
• UPC: 030999314529

Fitment

• Johnson/Evinrude 7.5 HP (1957-1958)

Replaces (OEM)

• 203034

Frequently Asked Questions

What engines does the Sierra 18-2952 head gasket fit? This head gasket is designed for Johnson/Evinrude 7.5 HP outboard motors from 1957-1958.

Does 18-2952 replace OEM part 203034? Yes, Sierra 18-2952 is a direct interchange for Johnson/Evinrude OEM number 203034.

How much does the 18-2952 head gasket weigh? It weighs 0.05 pounds.

How many gaskets come in a package? The 18-2952 is sold as a single unit, a unit count of 1.

Is the Sierra 18-2952 an OEM part or aftermarket? It is an aftermarket Sierra-manufactured gasket built to meet or exceed the original equipment part it replaces, OEM number 203034.

What is the function of the 18-2952 head gasket? It seals the cylinder head to the engine block on the applicable Johnson/Evinrude 7.5 HP powerhead, maintaining compression and preventing leaks between the mating surfaces.

Is the 18-2952 gasket covered by a warranty? Yes, Sierra 18-2952 is covered under Sierra's standard customer satisfaction warranty.

What is the UPC for the Sierra 18-2952 head gasket? The UPC is 030999314529.

Will the 18-2952 fit other Johnson/Evinrude horsepower models besides the 7.5 HP? The 18-2952 is specified for Johnson/Evinrude 7.5 HP (1957-1958) outboards; no other horsepower or year applications are listed for this part.

How is the 18-2952 different from similar Sierra head gaskets like 18-2951 or 18-2954? Each of these Sierra head gasket part numbers replaces a different OEM number, so 18-2952 (replacing 203034) is not interchangeable with 18-2951 or 18-2954, which cover different OEM equivalents.