RE: supertiger 3250
CH matra, If you want to run gas, buy a gas engine.
However if you insist, $250 for full conversion at CH Electronics, set up and test run. Ignition$175.00 and Walbor pump carb with adapter $60.00. +labor. The ST3250 runs good, but with the bushed rod you will need 10% oil.
Your choice.