reply to Red Green
Re: Convert from gasoline to tri-fuel What`s your budget?
Running a NG line might cost more than the conversion kit.
This website is pretty popular AFAIK for buying kits
Kit C and kit 4 would be tri-fuel, their differences are kit C should be used on 12hp or less generators (yours is 11.7).
Im thinking Kit C would be okay, plus they say it's easier to install than kit 4.