Greetings, Just came in from the field after suffering what I think is a stuck valve but I am not sure as I have no experience with them. Have been flying my Alon A-2 with a C-90 all year long with no problems. Today I fired it up and the engine was somewhat rough on taxi. During run up it was really rough, cycling the mags gave only a 75 rpm drop. Use of carb heat dropped the rpm by 200 instead of the normal 100. Full power run up gave only 1900 rpm and incredible roughness. Well can't fly on 1900 rpm so I taxied back to my hanger shut the engine down and checked the cylinders heads for heat. Three out of the four cylinders were very hot, one was noticeably much cooler. I pulled the prop through thinking it might work it self free, tried to start the engine and no go. It will not start. That was it for me. I put her away and will call my A&P tomorrow to find out what is up. In the meantime anyone out there have any ideas? Did I trash my engine? I didn't see any metal on the dip stick after shutting the thing down.
thanks for any ideas. Chad Surmick Alon A-2 N5479E
