General Hint
I discovered to my rude surprise I had to be very patient when installing new or converting to LPG. Keep tweaking the mixture control and after grinding your teeth for ten minutes the engine will start. Hidden drawback. Operating on gasoline then switching to alternative fuel. Gasoline in carb will gum. Figure out how to use Sta-Bil.
Wonderful to be able to use natural gas if possuble. Re-calculate max potential watts output X 60% due to degraded motor horsepower. Natural gas seems to ne THE way to go for long power outages. LPG exhaust has a sweetish odor, natural gas less so.
This sure didn't answer yoir question about a specific product. :)