Inboard & I/O Engine Parts
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Mercruiser Thunderbolt Ignition HEI V8 Tune Up Kit | Sierra 18-5273SIERRA-18-5273Qty In Stock: 92Brand: SierraTune-up kit includes cap & rotor fits Mercruiser V8 marine engines with Thunderbolt distributors. Learn More
Delco HEI Ignition Coil | Sierra 18-5443SIERRA-18-5443Qty In Stock: 11Brand: SierraIgnition coil with mounting bracket fits GM marine engines with Delco EST HEI ignition systems.
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Conventional Marine Ignition Switch Accessory/Off/Run/Start - 4 Position | Sierra MP41040SIERRA-MP41040Qty In Stock: 12Brand: SierraSierra Marine's replacement engine components are manufactured to meet or exceed OEM requirements. This ignition switch provides maximum corrosion protection and features a non-conductive glass-filled polyester housing that helps eliminate potential shorts. It also features an inner seal between the cylinder lock and contact plate.
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8.1 liter Spark Plug Wire Set | Sierra 18-8838-1SIERRA-18-8838-1Qty In Stock: 0Brand: Sierra8.1 liter Spark Plug Wire Set
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Conventional Marine Ignition Switch Off/Run/Start - 3 Position | Sierra MP41030SIERRA-MP41030Qty In Stock: 11Brand: SierraLearn MoreSierra Marine's replacement engine components are manufactured to meet or exceed OEM requirements. This ignition switch provides maximum corrosion protection and features a non-conductive glass-filled polyester housing that helps eliminate potential shorts. It also features an inner seal between the cylinder lock and contact plate.
Outboard Ignition Switch with Push to Choke Off/Run/Start - 3 Position | Sierra MP41000SIERRA-MP41000Qty In Stock: 17Brand: SierraSierra Marine's replacement engine components are manufactured to meet or exceed OEM requirements. This ignition switch provides maximum corrosion protection and features a non-conductive glass-filled polyester housing that helps eliminate potential shorts. It also features an inner seal between the cylinder lock and contact plate.
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Cobra SX Engine Coupler | Sierra 18-21752-1SIERRA-18-21752-1Qty In Stock: 19Brand: SierraAftermarket coupler connects OMC & Volvo Penta GM V6 & V8 engines to stern drives. Learn More
GM 3.0L Cylinder Head Gasket | Sierra 18-2946SIERRA-18-2946Qty In Stock: 25Brand: SierraSeals cylinder head to engine block on GM 181 cu. in. marine engines. Learn More
Prestolite V8 Screw Down Cap Tune Up Kit | Sierra 18-5279SIERRA-18-5279Qty In Stock: 27Brand: SierraTune-up kit includes cap and rotor. Learn More
Outboard Ignition Switch | Sierra MP39760SIERRA-MP39760Qty In Stock: 15Brand: SierraLearn MoreSierra Marine's replacement engine components are manufactured to meet or exceed OEM requirements. This ignition switch provides maximum corrosion protection and features a non-conductive glass-filled polyester housing that helps eliminate potential shorts. It also features an inner seal between the cylinder lock and contact plate.
2-1/2 inch Exoflex Exhaust/Water Hose, sold per foot | Sierra 116-254-2120-1SIERRA-116-254-2120-1Qty In Stock: 42Features a corrugated exterior and is internally reinforced by wire to prevent hose from collapsing. Primarily used for connections in marine wet exhaust and engine water circulation applications, especially where significant bends of hose are required. Designed to resist heat, exhaust gases, ozone, antifreeze, and saltwater Learn More
High Pressure Electric Fuel Pump | Sierra 18-7330SIERRA-18-7330Qty In Stock: 12Brand: SierraHigh pressure fuel pump used on many Volvo Penta & OMC marine engines. Learn More© 2025 Marine Parts Source. All Rights Reserved.