Lol !! Sir you do not have to turn the motor over to fill up the carburetor bowels with an electric fuel pump . Turn your fuel pump on. Wait 10 to 15 seconds if that long . Then turn start your engine. Now a mechanical pump you would have to turn the engine over and over and over to feel the bowels up. But there is no electricity on mechamical pump. That's why its called mechanical !! And if your magneto goes out you don't have to worry about killing the fuel. Motor will not be running..