I'm fed up with this engine, tuning is still not consistent with the exception of it over heats no matter what. it even runs around 200 at idle and 280+ at speed. have a feeling I have some engine damage and maybe something going on in the carb. Just seems a lot of what it's doing contradicts itself. Very rich idle yet it's trying to crawl and then shuts off and won't restart without tinkering with the needles. Are these engines known for difficult tuning?