Yes, its a 20 hp tractor, takes me 2 hours every week to mow 4 acres.
It used to have terrible low end torque and terrible fuel economy, and
wouldn't idle below 1500 rpm. Now my 2 hours are much more pleasant,
throttle is smooth, plenty of low end torque, it idles at 800 rpm, and I
don't run out of gas (HURRAY). The system is identical to a V8, I only
have 2 plug wires hooked up. Next one goes on my 403. Bruce Roe