807166A1 Water Shutter Kit With Crommet for MerCruiser Stern Drive V6 V8 Engine 4.3L 5.0L 5.7L 5.8L 6.3L 7.4L 8.2L Y Pipe Exhaust Flapper used 2 Piece Maniflod Elbow 807166A-1

807166A1 Water Shutter Kit for MerCruiser Sterndrive V6 V8 Engine Boat Motor Replacement Parts 2 Piece Y Pipe Exhaust Flapper used Manifold ElbowActs as a check valve to keep following seas/water from washing back through exhaust to engine when engine is not running or at low RPM.Shutter is 2.48" diameter at cross pin (hinge pin).SPECIFICATION:The shutters are designed for MerCruiser Sterndrive V6 V8 Engine with Y-pipe bellows have two rectangular holes for the grommets.If your Y-pipe changes size a few inches bellow the shutter, you have a one piece manifold Y-pipe V6 engines and need shutter 807166A2. If your Y-pipe has round holes you need the water shutters 807166A3.APPLICATION:MerCruiser Sterndrive 4.3L MerCruiser Sterndrive 4.5LMerCruiser Sterndrive 5.0L MerCruiser Sterndrive 5.7L MerCruiser Sterndrive 5.8L MerCruiser Sterndrive 6.3LMerCruiser Sterndrive 6.3L MerCruiser Sterndrive 7.4L MerCruiser Sterndrive 8.1LMerCruiser Sterndrive 8.2LPACKAGE INCLUDED:2X Water Shutter4X GrommetsNOTE:See your owner's manual or service manual for specific applications and replacement instructions.It is VERY IMPORTANT to check outboard model, serial number, year and horsepower before purchase. Ask us any questions if you are not sure, we are pleasure to help you.

• Water Shutter Kit 807166A1 fits MerCruiser Sterndrive engines from year 1998 & UP. Fits oval 4 inch Y-pipes with two rectangular pin holes.
• Also called a water flapper. Acts as a flexible check valve to stop water from returning up the exhaust system to the engine.
• Fit for MerCruiser Stern Drive 4.3L 5.0L 5.7L 5.8L 6.3L 7.4L 8.2L Diesel or Gas Engines.
• The Part number is Replaced by 807166A1, 807166A-1 OBR Red Rhino MR-507, GLM Marine 89175, Pro Marine 65167.
• If you have two rectangular holes for the grommets you need the water shutters 807166A1. If your Y-pipe changes size a few inches bellow the shutter you have a one piece manifold V6 Y-pipe and need shutter 807166A2.