I know the tech that came out checked the trans pressures. There is no slippage. We had also checked the brake for hanging up.

The governor is something I will look at tomorrow. I have no idea what screw is the mixture adjustment but the only one i've found on the carb we can turn and it doesn't seem to make any difference in the way it runs.

Based on the compression, is that fairly normal for these engines? Seems quite low compared to any other engines i've ran tests on in our shop