My $25 14" Might Mite yard sale chain saw won't stay running once it hits the wood. I've had it a few years and have used it occasionally for some pruning and yard work, but not much. We did take out the neighbor's 20' birch a few years back, so it could do the job. the project at hand is a 15' Mountain Ash with a 12"-14" trunk and 4-5 6"-8" limbs. Probably 10 minutes to trim and fall and then half an hour or less to munch down into baggable curbside waste. What happens is that it starts with some coaxing and I can get it screaming a bit with some careful throttle work, but once I think it's good to go and touch a limb, it just bogs down and dies. I'm thinking it could be a fuel supply/filter issue, as my two two stroke trimmers both suffered from rotted lines, and one still won't stay running. Some online sources suggest a carb kit as there may be diaphragm issues too Any ideas? It's a cheapie and doesn't get used much, so I'm not looking to spend a bunch of cash on it as I'm sure I can find another. I figured I'd ask here before I move on.