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Mercury MerCruiser 3.0L sterndrive (inboard/outboard) marine engine - $3,500 (Wailuku)
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• Engine Oil: Generally takes about 4 quarts of marine engine oil, often specified as 25W-40 or a 20W-40 / straight 40-weight • Cooling System: This raw-water-cooled or closed-cooled setup draws water directly through the sterndrive or a heat exchanger (many 3.0L MerCruiser models are raw-water cooled without a traditional large automotive-style coolant radiator/reservoir, instead using an engine block drain and thermostat housing).
• Power Trim / Gear Lube Reservoir: The translucent plastic bottle on the starboard (right) side with the blue/black cap is the gear lube monitor for the Alpha One outdrive, which uses high-performance gear lube (typically SAE 90-weight gear oil).