www.propane-generators.com/eu2000i_ kits.htm

Correction to my comment about losing 10% of power, apparently this is
no longer the case with the latest conversion mod:
www.propane-generators.com/dedicated_kits.htm "This type of conversion
will produce FULL power because the carburetor is now delivering fuel at
the exact location that was engineered for the delivery of gasoline to
the engine air stream."