this ran like a top but one day I was using it and I put it down, went to use it again and it wouldn't prime. I couldn't get it to run. I ordered a replacement carb, fuel lines, spark plug and air filter and it ran great... until it warmed up. Once it warms up it loses power. It will continue to lose power until it eventually stalls out. Once it cools down it starts and runs fine again. Any ideas? Are there adjustments that need to be made? Thanks, chuck