That's an 85 HP John Deere. It's got both a 540 and 1000RPM PTO. The generator has a shaft with splines for a 540 shaft but we have an adapter and use the 1000 to run it, letting the generator make full power with the tractor only running at 1100 RPM. It used roughly 10 gal of fuel every 24 hours. No good for long term but definately ok for a week or so here and there.