Hi there here is a video of my ST 3250 gas conversion, used a Walbro carb,and an autoadvance CDI ignition system, on the bench it runs smooth and it drops 6400 revs with a menz 18-10, I should use a 18-8 as with glow the power pick is 7,700 with a 18-8 so I think is not bad for a conversion, I made a ring to mount the sensor, and a flange to fix the carburattor, Im using amsoil dominator at 25/30-1, temperature at full throttle for a couple of minutes goes around 280F transition is good so let see how it flyes! and how long it last! [link]http://www.youtube.com/watch?v=pzYmPsxzoVc[/link]