No throttle response at Low End

A

alumaline

New Member
My China girl engine has terrible low end throttle response. The RT carb is way better than the stock carb but low end is so bad if I don't constantly rev the motor it dies. Sometimes when the motor is hot it will run at high rpm without me reving motor. A cold motor with full choke has a reliable idle.

I tried Al Fishermans engine trouble shooting ideas, which helped a little but no fix.

Thanks in advance.

Mark S.
 
"Sometimes when the motor is hot it will run at high rpm without me reving motor." = revving with the throttle closed- This makes me think air leak.
I would check the manifold to carb junction and the manifold to cylinder connection, too. Also check the carb slide is moving smoothly as the throttle is twisted.
Just a first impression.
Good luck!
 
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