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Always replace the rubber seal when installing a new thermostat to prevent leaks
Remove the old pump and clean the mounting surface thoroughly to ensure a proper seal
Remove Old Thermostat: Unbolt the thermostat housing cover (typically 2–4 bolts)
1 x O-Ring (D:1
Exhaust Elbow Gasket – Fits MerCruiser 120, 140/3.0L, 470, V8 Engines (Replaces 27-99777-2) family-mercury-800hp Always replace the rubber sealExhaust Elbow Gasket Fits MerCruiser 120, 140 3. 0L, 470, V8 Engines (Replaces 27 99777 2) This high quality exhaust elbow gasket is engineered for a precise fit on a range of MerCruiser sterndrive and inboard engines. It is designed for 120 series (1983 and newer), 140 3. 0L, 470, 165 inline 6 cylinder, GM V 8 small block models (1982 and older) with standard cooling, and Ford V 8 engines. This component serves as a direct replacement for multiple
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