Description
SIERRA Johnson/Evinrude Cylinder Head Gasket – 18-2963
Cylinder-head gasket for Johnson/Evinrude marine engine applications using OEM 318914 / 320533 / 330818. This Sierra replacement is intended to match the corresponding marine application and OEM interchange references listed below.
- Application: Johnson/Evinrude marine engine applications using OEM 318914 / 320533 / 330818
- Function: Seals the cylinder head to the block around combustion chambers, coolant passages and oil passages; correct gasket selection is critical to compression and cooling-system integrity.
- Component: Cylinder head gasket
- Primary OEM reference: 318914 / 320533 / 330818
- Interchange: GLM: 34140; Johnson/Evinrude Outboard: 318914, 320533, 330818; Mallory: 9-63832
Confirm the engine/drive model, year or serial range and original part number before installation. Clean mating surfaces and inspect adjacent service parts so a worn companion component is not carried into the repair.
Specifications
- Component: Cylinder head gasket
- Primary OEM reference: 318914 / 320533 / 330818
Interchange / Replaces
- GLM: 34140
- Johnson/Evinrude Outboard: 318914, 320533, 330818
- Mallory: 9-63832

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