All the carbs I tried did the same. Some did not run at all. I tried a ZAMA that once ran good on another engine, no good. I have another smaller walbro that idles as poorly and cuts the top end by about 800 RPM. On a whim I tried some tiny walbros, like the ones tht come on Ryobis and featherlites, did not run much at all. Throttle plate equals butterfly?? I have read about filing a littlle notch in the butterfly to enhance idle performance, what 's the deal with that?

The jug is glued down with high temp silicone gasket goop as are the crank case parts. The timing disk on the pto is a bear to get off. The mount stand off is a convaluted thing. Is there a way to actually check/find leaks vs taking it all apart and re-sealing everyting? Could I put soapy water on the case and jug seams and put air pressure down the spark plug hole?? Make a plate to cover the exhaust or carb port and put the piston in the right sport then pressurize the case?