Exhaust Water Shutter Kit – Fits MerCruiser 3.0-4.2L (Replaces Mercury/MerCruiser 807166A3, Sierra 18-2732-9) 4.4HP Clean both the housing and

Clean both the housing and the cover surfaces thoroughly

reducing steering effort

Notes Mercury 8 HP (209cc) 8 4-Stroke 2005–2023 47-803748/47-8M0214944 Serial #: 0P325500 & Up

Post-installation squealing usually indicates incorrect tension

Verify your part number before ordering

Exhaust Water Shutter Kit – Fits MerCruiser 3.0-4.2L (Replaces Mercury/MerCruiser 807166A3, Sierra 18-2732-9) 4.4HP Clean both the housing andProduct 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,