Great engine, Power house, mine is a good 25-30 ish yrs old & running VERY strong. If I had a complaint, it is that the engine with its stock muffler is loud. An after market muffler quiets it down nicely without any power loss. New fuel, or oven heating work well for un-sticking stuck parts. Try oven first before trying fuel, fuel in an engine inside an oven is not a good thing!