Luft i can help u with that .. I have a 26gt on my giant ucando. U will love this engine. WHen a gas engine is new the diaphragm in the carb that actually pumps gas to the carb is dry. It needs to b wet.Thats y it starts when u shoot gas into the carb. This is the case with all gas engines. U can either take the screw off the top of the carb facing u and wet it down with gas or either put ur finger on the choke butterfly itself blockin the hole in the butterfly with ur finger and push it closed with the ignition OFFFFFF~~~. Turn the prop about 10 times with the throttle about half open till u feel gas come up on ur finger. HOld the choke shut for about a minute and let the gas flow into the diaphragm to soak it. It will start on the first flip. It will get better everytime u fly it. Mine was the same way as well as all my gas engines. Or if u want to get it done now just take that screw off and pour some gas on it and let it soak in. This is a great engine and produces a ton of power. Mine will turn an APC 18x6w at over 8600 static runnin rich with a stock inverted pitts muffler from Evolution. THe first thing u will find is it sips gas. I have a 24 oz tank and i can fly 40 minutes and have half a tank left. Thats economy. As far as it cuttin out open both needles 2 turns out like someone suggested earlier. After some runtime u an lean out the low end till it starts to speed up slightly and then back offf just a bit. The high end is done just like any other 2 stroke. Hope this helps.