Exhaust Water Shutter Kit – Fits MerCruiser 3.0-4.2L (Replaces Mercury/MerCruiser 807166A3, Sierra 18-2732-9) 4.4HP 0GS 130-140 4-Stroke 21213664

0GS 130-140 4-Stroke 21213664

1 x O-Ring (310584)

You may need to remove other components for access

Reconnect the battery and check for leaks and proper operation once the boat is in the water

Post-installation squealing usually indicates incorrect tension

Exhaust Water Shutter Kit – Fits MerCruiser 3.0-4.2L (Replaces Mercury/MerCruiser 807166A3, Sierra 18-2732-9) 4.4HP 0GS 130-140 4-Stroke 21213664Product 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,