Sierra Powerhead Base Gasket Gaskets & Seals

Sierra Powerhead Base Gaskets are replacement outboard powerhead base gaskets (also called powerhead gaskets or engine base gaskets) for marine engines. The gasket seals the joint where the powerhead meets the mounting surface below it. A good seal helps the engine hold its sealing integrity and keeps it running reliably.

Key Features:

• Replacement base gaskets for outboard engines, with applications covering several marine engine brands, including Mercury/Mariner, Johnson/Evinrude, Chrysler/Force and Yamaha
• Built to meet or exceed the quality of the original equipment part they replace
• Made to fit specific engine applications so they seat correctly and seal well
• Many are interchangeable with common OEM, GLM and Mallory part numbers, which makes it easier to find the right replacement
• Suited to routine maintenance, powerhead rebuilds and engine repairs

Sierra is a long-established name in marine replacement engine parts. Choose the part number that matches your engine to get a correct fit and a dependable seal.