I have been messing with my 305 for a long time now. I just got the carb rebuilt, and it runs pretty decent, except for the fact that it is REALLY SLOW. I know 305's are slow, but mine is REALLY slow. It doesnt want to "take off".... I floor it and it just kinda whinds up slowly. It is not running at its full H.P. AT ALL!! Im lost, and dont know what to do. I want to forget this engine and drop a 350 in there, but Money doesnt grow on trees!! Please help me diagnose my problem!! Ask me any and ALL questions, and maybe I can get this engine running BETTER!