Mercury - Crankcase assy - 879172130 ProMariner Battery Isolators providing smooth thrust and efficient

providing smooth thrust and efficient performance at a more affordable cost than stainless steel models

the engine will start easier and run smoother

It’s not just about smoothing out the bumps — it’s about feeling connected to the road or trail in a way that builds confidence

Accessory under cowl kit

and the fit is exactly what you’d expect from a purpose-built OEM part

Mercury - Crankcase assy - 879172130 ProMariner Battery Isolators providing smooth thrust and efficientCrankcase assy WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.