Exhaust Flapper Protector Valve – Fits MerCruiser (Replaces 12644A1, 12644Q01) 600HP and MR drive units from

and MR drive units from 1983 and newer

It ensures reliable power transmission from the crankshaft to the alternator

To guarantee a perfect fit

ensuring reliable performance across a range of inboard engines

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

Exhaust Flapper Protector Valve – Fits MerCruiser (Replaces 12644A1, 12644Q01) 600HP and MR drive units fromProduct 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