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Product Type Water Shutter Kit Installation Y-pipe mount Connection Rectangular pin holes Housing Material Rubber with metal rod Housing Color Black Dimensions Fits oval 4-inch Y-pipes Fitting Type 2-piece clapper design Other Technical Attributes Acts as a check valve to prevent following seas/water from washing back through exhaust to engine when not running or at low RPM What’s in the Box
Disconnect the boat's battery to prevent accidental starts
Install the new gaskets
5μL and ±1% at 10μL
and O-rings that are being replaced by this kit
Water Pump Impeller Repair Kit – Fits Mercury/Tohatsu 9.9-20 HP 4-Stroke EFI (Replaces 8M0137849, 8M0135821) 440HP Product Type Water Shutter KitProduct Details This Water Pump Impeller Repair Kit Fits Mercury Tohatsu 9. 9 20 HP 4 Stroke EFI (Replaces 8M0137849, 8M0135821) is designed for Mercury Mariner 9. 9, 10, 15, and 20 HP 4 Stroke EFI outboards (2020 and newer, S N 0R833820+) and compatible Tohatsu Nissan 15 20 HP (MFS) 4 Stroke models. It provides all necessary components to restore your engine's cooling system performance. It serves as a direct interchange for Mercury part numbers
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