Mercury - Quicksilver 807952A1 Fuel Pressure Regulator Kit MerCruiser Sterndrive & Inboard OEM Replacement 807952A1. Overview. A reliable engine doesn't happen by luck - it's built from precision parts that work together without fail. The Quicksilver 807952A1 Fuel Pressure Regulator Kit is one of those small but critical components that keeps your MerCruiser's fuel system performing exactly as it should. When you hit the throttle, it's what makes sure your engine gets the steady, balanced fuel p