More jumping batteries

[Fastguy]

Originally Posted by zed

the last I looked at that other thread somone posted that they hooked up a lawnmower (I think) to a car battery and it spun up so fast it sounded like a jet. I thought he was trying to stir the pot some but do remember that happening to 50cc atv's when hooked to like a battery big enough to crank a bigger bike.

That was me, 12V rider mower, usually cranked very slow and died in my driveway. I jumped it with my F-250 (not running) and it spun really fast, not literally like a jet, (though I have started those with 12V truck batteries as well).

[Smittie61984]

I've heard some say that if you absolutely have to use your car/truck that you want to stop the motor but have the radio, air, bright lights, brakes, etc going to bring the voltage down.