Sierra Marine Engine Parts
Sierra is the aftermarket parts line most boat owners and marine mechanics reach for when an inboard, sterndrive or outboard needs service. We list more than 1,000 Sierra parts, each with its 18-series part number in the title so you can cross it to the engine maker's number.
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Fuel and ignition: carburetors such as the 18-7376N for MerCruiser 5.0L/5.7L and the 18-7370N for MerCruiser 2.5L/3.0L, electronic distributors and stators like the 18-5876-1 for Mercury 135-200HP.
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Exhaust and cooling: manifolds and risers including the 18-1966-1 for MerCruiser 3.0L, 1990 and newer, dry-joint manifolds and elbows for V6 and V8 engines, and sea water pumps such as the 18-3600.
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Drive, trim and steering: tilt/trim motors, the MerCruiser hydraulic trim pump assembly, engine couplers, U-joints, gear sets and power steering pumps.
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Starting: starters such as the 18-6426 for Yamaha outboards.
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Gauges: matched sets in the Amega, Arctic, Eclipse, Lido and Sahara series, for example the Premier Pro 6 gauge set.
How to find the right Sierra part
Search this page for the Sierra number if you have it. If you only have the engine maker's part number, or the engine make, model, horsepower, year and serial number, send them to us and we will cross-reference it. Serial number matters on MerCruiser exhaust parts, where the fit changes at specific serial breaks. More boat parts: marine engine, fuel and propellers and all marine and boating.
Are Sierra parts genuine OEM?
No. Sierra is an aftermarket brand that makes replacement parts to fit MerCruiser, Mercury, Yamaha, Johnson/Evinrude, OMC, Volvo Penta and other engines.
What do I need to look up a part?
The engine brand, model, horsepower and year, and the serial number where you can find it. A photo of the old part and any number stamped on it also helps.
Do you sell these for RVs too?
These are boat engine parts. For RV and trailer parts start at all RV parts.
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