so my homelite chainsaw will run and cut on half choke but it wont run when under load under load. i'll rev the engine all the way up then put it too the wood and then it bogs right down and shuts off. it also takes a long time to start. you can get the thing to idle when you start it but as soon as you hit the gas it shuts off. i have to repeat the process at least 3 times before it will run correctly. i dont know if i have to adjust the carb, or the idle maybe? pretty much clueless. thanks in advance.