Mercury – Oil Pump Assembly | OptiMax & Diesel Series | Marine-Grade Construction | 8M0185614Mercury Oil Pump Assembly OptiMax & Diesel Series Marine Grade Construction 8M0185614 Overview Every boater knows theres a certain peace that comes when your engine runs the way its supposed to smooth, steady, and trustworthy. Thats the kind of confidence this Mercury Marine part gives you. An oil pump may not be something you show off, but you sure feel its importance when youre running far from the dock. With this assembly in place, you know your