I have a trainer with what I believe to be a .65 size Thunder Tiger engine up front. The markings on the engine are 65 on the right side and GP SE on the left, with the TT logo. I am attempting to get this engine running but am finding that only 1/4 turn is required on the needle to get to the proper mixture for running. This bothers me quite alot, since my other 9 models require anywhere from 1 to 1.5 turns on the needle.
Is this typical for these engines, or does this suggest something wrong with the needle taper or other carb component?
TIA, Jake McKernan