Exhaust Water Shutter Kit – Fits MerCruiser 3.0-4.2L (Replaces Mercury/MerCruiser 807166A3, Sierra 18-2732-9) 4.4HP Post-installation squealing usually indicates incorrect

Post-installation squealing usually indicates incorrect tension

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Product Type Water Pump Impeller Installation Direct Replacement Fuel Type Gasoline Housing Material Plastic Hub Dimensions Overall Diameter: 41

Clean both the housing and the cover surfaces thoroughly

Exhaust Water Shutter Kit – Fits MerCruiser 3.0-4.2L (Replaces Mercury/MerCruiser 807166A3, Sierra 18-2732-9) 4.4HP Post-installation squealing usually indicates incorrectProduct Details This Exhaust Water Shutter Kit is designed for MerCruiser 3. 0L, 3. 6L, and 4. 2L inboard and sterndrive engines from model years 19941997. It functions as a flexible check valve, preventing water from flowing back up the exhaust system and into the engine. This kit is a direct interchange for several part numbers, including Mercury MerCruiser 807166A3, Sierra 18 2732 9, GLM 89170, and Mallory 9 42802. Designed for direct replacement,