OS65 not reaching high RPM
by Dominic Christopher
(Abu Dhabi - UAE )
I have an OS65, and it just does not seem to reach a high RPM on max throttle. Tried adjusting the mixture screw both ways but either the engine has no power (when air mix screw is opened more than 2 turns)or starts dropping power if I go beyond 11/6 to 1 1/8 closed mix screw.
Also the little screw on the left side of the carb was adjusted so I am not sure if that could be a reason for the engine not gain a higher RPM. All servo linkages and travel adjustments are ok. (would also like to know what that little screw does?)
Would appreciate your kind advice.