Hey, i have a little 80cc 4stroke yamaha engine, and i cant get it to run. It will start on starting fluid and run for a few seconds depending on how much i spray. It will not run on its own will out the fluid. so that tells me its a fuel not geting through the carb issue. ive replace the intake seals and got a new sparkplug. so what should i do next? ive never delt with something like this before and i dont know what to do next. please help!