Exhaust Flapper Protector Valve – Fits MerCruiser (Replaces 12644A1, 12644Q01) 600HP prime the fuel system by

prime the fuel system by cycling the key

These registration stickers anre designed to meet requirements across all US states and territories

designed for clear identification on outdoor equipment

and MR drive units from 1983 and newer

which fits inside a permanent filter housing on the engine

Exhaust Flapper Protector Valve – Fits MerCruiser (Replaces 12644A1, 12644Q01) 600HP prime the fuel system byProduct Details This 4" Exhaust Flapper Protector Valve is designed for MerCruiser stern drive applications. The rubber flapper prevents water from entering the exhaust system through the outlet while allowing exhaust gases to exit freely. It is made from weather resistant EPDM rubber with an integrated UV stabilizer to ensure longevity. This part serves as a direct replacement for MerCruiser parts 12644A1 and 12644Q01. It also provides an interchange