Originally Posted by
diamondracing
I had the same problem. I usually run the B10 -B9 more expensive engines and was getting real
Soon as I changed that o ring it ran like a champ. I also use 97t odonnell plug
i knew something was wrong , i never had a problem with my nova .21 bf with tuning the low end even at a half gallon or more.
i do have some nova carb o-rings will they fit ? does the stock ones on the rb swell up or something.