Rigdon wrote:I pressurized both cylinders through the spark plug hole with 100 psi. At TDC air just rushed out of the intake, rotated fly wheel to different positions and compression built up no air coming out of the tail pipe or intake was noted . I went back to TDC and poured Chemtool into each spark plug hole and reinserted plugs and will soak the valves for a couple of days. At TDC I did not see chem tool leak out. May leak oy slowly. I still don't know how intake valves can just stick in both cylinders at the same time while the engine was running? I can see them sticking if it sat for a period of time without the engine running. Has anyone seen this happening before?
if the intake valve had pressure coming out instead of in then you have stuck intake valves on both cylinders. the trick with pressurizing the cylinder through the sparkplug works very well. Other small engines used to get carbon fouling in the valve guides resulting in stuck valves and no compression usually from the carb running rich.
