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Sierra 18-0103 Powerhead Base Gasket for Johnson/Evinrude Outboards

Manufacturer

Picture for manufacturer Sierra

Part Number

118-0103
6 reviews
Sale Price

$12.40

In Stock (7)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-0103 powerhead base gasket is a premium replacement gasket designed for Johnson and Evinrude outboard motors. This critical sealing component forms a reliable seal between the powerhead and the exhaust housing, preventing water intrusion and maintaining proper compression.

Key Features:

  • Precision-cut design ensures exact OEM fit and function
  • High-quality gasket material resists heat, oil, and saltwater exposure
  • Replaces OEM part number 318358 for various Johnson/Evinrude models
  • Helps maintain optimal engine performance and prevents costly water damage
  • Manufactured by Sierra, a trusted name in marine aftermarket parts

This gasket is an essential component during powerhead removal or exhaust housing service. Sierra gaskets are engineered to meet or exceed OEM specifications, providing reliable sealing and long-lasting durability in harsh marine environments.

Items were as described and appear to work as intended. Have not test drove the car to make sure the ignition coils function under load/boost. They shipped from a reputable supplier so I am confident in the purchase.

Great

I'm thrilled to find the equipment needed to start work on my restoration project! Thanks for making it simple and stress FREE !!!

website was easy to use and the prices are great

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