Exhaust Water Shutter (Flapper) – Fits MerCruiser 2.5L, 3.0L, 3.7L Engines (Replaces 60930, 25-43809) 173HP This is critical for preventing

This is critical for preventing corrosion

often superior to the aluminum used in original skegs

water contamination in the engine oil (giving it a milky appearance)

This ensures a tight

Brand Part Number OMC 5001594 OMC 390768 Sierra 18-3392 GLM Marine 12102 Mallory 9-48203 Red Rhino JE-410

Exhaust Water Shutter (Flapper) – Fits MerCruiser 2.5L, 3.0L, 3.7L Engines (Replaces 60930, 25-43809) 173HP This is critical for preventingProduct Details This Exhaust Water Shutter (Flapper) Fits MerCruiser 2. 5L, 3. 0L, 3. 7L Engines (Replaces 60930, 25 43809) is an essential replacement part for MerCruiser stern drives. Specifically designed for 2. 5L, 3. 0L, and 3. 7L inline 4 cylinder engines from various model years, it functions as a critical one way valve in the exhaust system to prevent water from flowing back into the engine cylinders. This part serves as a direct replacement