Originally Posted by
grub
gidday i have a nova 12-3 plus sct
im getting air in my fuel line and when its warm there a air bubble near my high speed needle and it wont move wont let fuel through either .
my engine wont start when warm as the air bubble moves up and down my fuel line even when the throttle in open it still wont let fuel into the carby.
it changes tune as it get warm,allso it will run great for about 4 laps then it sounds like it starving/flooding and no power a stalls .
allso idles erractic when warm...i blamed the fuel tank but the tank holds pressure,any help much appreciated
is a new engine
The engine is probably too hot. The metal carb is most likely vaporizing the fuel before it can get to the engine. The engine may also be getting too hot, and losing the compression needed to pump the fuel into the carby. How hot are you running the engine? You say the engine is new? If you still can't get the engine to run properly please send it to me, and I will test it. I have also seen dried up oil from the fuel, or after run oil clog up a carby. You may want to take the carb apart to check that. Have you had this problem with the other engines?