Exhaust Water Shutter/Flapper – Fits MerCruiser V6 & V8 Engines 1982–1987 (Replaces 99370A2, 23-92852, 92802, 18-2733, 89160, 9-42801) 235HP A noisy or grinding roller

A noisy or grinding roller should be replaced immediately

and MD series from the 1970s–2000s)

Engineered with durable rubber/neoprene for longevity in marine environments

Installs in engine-mounted sea water pumps

This kit repairs the seal at the point where the shift shaft enters the bell housing

Exhaust Water Shutter/Flapper – Fits MerCruiser V6 & V8 Engines 1982–1987 (Replaces 99370A2, 23-92852, 92802, 18-2733, 89160, 9-42801) 235HP A noisy or grinding rollerProduct Details This Exhaust Water Shutter Flapper is designed to prevent water from flowing back into the engine through the exhaust system. It is engineered for MerCruiser V6 (4. 3L) and V8 (5. 0L, 5. 7L) stern drive engines produced between 1982 and 1987 that are equipped with 3 inch exhaust Y pipes. This part serves as a direct replacement for multiple OEM and aftermarket part numbers, including Mercury 99370A2 and Sierra 18 2733. Acts as a