Exhaust Water Shutter/Flapper – Fits MerCruiser V6 & V8 Engines 1982–1987 (Replaces 99370A2, 23-92852, 92802, 18-2733, 89160, 9-42801) 235HP GW Shipping speed & cost

GW Shipping speed & cost

most manufacturers recommend replacing the impeller every 1-2 years or every 100-200 hours of use

A noisy or grinding roller should be replaced immediately

and MD series from the 1970s–2000s)

Neoprene impellers

Exhaust Water Shutter/Flapper – Fits MerCruiser V6 & V8 Engines 1982–1987 (Replaces 99370A2, 23-92852, 92802, 18-2733, 89160, 9-42801) 235HP GW Shipping speed & costProduct 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