Ya they are available many places after market and different weights, could get a lighter one that would also spin up quicker. Cost anywhere from 25$ up.
I'm a boater who just stumbled across this thread, I admit I don't know much of anything about cars, may be a simple reason it won't work in a car, but if you figure a boat engine would work can't see why just the flywheel wouldn't work on your car engine.
Last edited by siberianhusky; 12-18-2014 at 08:02 AM.