Mercury - Engine Starter Yamaha Compatible Gear Reduction 8M6007430. Overview. When you're running a 250 horsepower Yamaha, you expect every start to feel confident and immediate-no hesitation, no surprises. That first turn of the key sets the tone for the whole day, whether you're easing out at sunrise or pushing hard toward clean offshore water. The Quicksilver 8M6007430 Starter is built for boaters who depend on that reliability. It brings a steady, reassuring sense of readiness that keeps yo