Quicksilver 60930 Water Shutter, Water Flapper for Select MerCruiser Sterndrive Engines Trolling Motors Accessories This razor-sharp flex stands out

This razor-sharp flex stands out from the others in size and performance

Keeps liquids hot for up to 20 hours

Model: TTU300HL

350 & 377 Cid) engines having serpentine belts

Quicksilver 60930 Water Shutter, Water Flapper for Select MerCruiser Sterndrive Engines Trolling Motors Accessories This razor-sharp flex stands outMerCruiser Water Shutter 60930, also known as a water flapper, acts as a flexible check valve for your exhaust system. It allows exhaust to exit freely while the engine is running but closes when the engine is off to prevent water from back flowing and causing catastrophic engine damage or corrosion. Acts as a flexible check valve to stop water return Fits numerous MerCruiser sterndrive exhaust systems Installed downstream of the flexible union