Sierra Powerhead Base Gasket 18-0115, Replaces 27-F307279-2, Fits Chrysler/Force 150 HP 1989-1994

The Sierra Powerhead Base Gasket, part number 18-0115, seals the joint between the powerhead and the crankcase on covered Chrysler/Force outboards, sold as a package of two so you have a spare on hand for the next service interval. A properly seated base gasket is essential to maintaining crankcase compression and preventing air or oil leaks at the powerhead mating surface, both of which can cause hard starting, rough idle, or reduced power if the seal fails.

This gasket is a direct equivalent to Chrysler/Force OEM part 27-F307279-2, so it installs in place of the original without modification. It is designed for the Chrysler/Force 150 HP outboard built in the 1989-1994 model years within serial number range E000001-E093699. Because base gaskets are a wear item that should be replaced any time the powerhead is removed or reseated, keeping the included pair on hand covers both a current job and a future one.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0115
• Product Type: Powerhead Base Gasket
• Package Quantity: 2 gaskets
• Weight: 0.06 pounds
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• UPC: 030999750938
• OEM Cross Reference: 27-F307279-2

Fitment

• Chrysler/Force 150 HP outboard, 1989-1994, serial number range E000001-E093699

Replaces (OEM)

• 27-F307279-2

Frequently Asked Questions

What does the Sierra 18-0115 powerhead base gasket fit? Sierra part 18-0115 fits the Chrysler/Force 150 HP outboard built in the 1989-1994 model years, within serial number range E000001-E093699.

How many gaskets come in this package? The 18-0115 powerhead base gasket ships as a package of two, giving you a spare for the next time the powerhead is serviced.

Is 18-0115 a direct replacement for the original Chrysler/Force gasket? Yes, 18-0115 replaces OEM part 27-F307279-2 and installs in the same location without modification.

What is the OEM part number that 18-0115 replaces? It replaces Chrysler/Force part number 27-F307279-2.

How much does the powerhead base gasket weigh? Each package of the 18-0115 base gasket weighs 0.06 pounds.

What are the dimensions of the 18-0115 gasket? The gasket measures approximately 0.39 x 0.39 x 0.39 inches.

When should I replace the powerhead base gasket on my Chrysler/Force outboard? The 18-0115 base gasket should be replaced any time the powerhead is removed or reseated on a compatible Chrysler/Force 150 HP outboard, since the seal cannot be reused reliably once broken.

What happens if the powerhead base gasket fails? A failed base gasket can allow air or oil leaks at the powerhead-to-crankcase joint, leading to hard starting, rough idle, or reduced power, which is why Sierra part 18-0115 is stocked as a maintenance replacement.

Is this gasket brand new or a used part? The Sierra 18-0115 powerhead base gasket is a new replacement part, sold in a sealed package of two.

Does 18-0115 fit other Chrysler/Force horsepower models? 18-0115 is specified for the 150 HP Chrysler/Force outboard within serial range E000001-E093699; other horsepower or serial ranges use a different Sierra part number.

What UPC is associated with the 18-0115 gasket? The Sierra 18-0115 powerhead base gasket carries UPC 030999750938.