The videos show the pros emphatically. There is a lot to like with propane and the hardware to switch a Kohler to propane (or to dual fuel) is readily obtained.
Things to keep in mind:
- Propane will yield somewhat lower horsepower than gasoline for a given engine displacement/compression ratio.
- Sizing a propane tank big enough to run the engine for as long as you need it. The inter web tells us a standard 20 lb propane tank contains approximately 430,000 to 455,000 BTUs. In one gallon of gasoline there are approximately 114,000 to 125,000 BTUs. So about 3.5 gallons of gas (a full 300, 400, or 500 tank) equals one 20 lb tank. Near me a tank refill ~$20; a gas refill ~$15.
- Where on the tractor to mount it safely, including plumbing
- Refueling convenience (i.e. switching tanks and getting refills)