vic syracuse
Well Known Member
This is something I have never seen before. This plug came out of the lower position in number 2 cylinder on my RV-10. It is the Unison UREM38S fine wire plug with about 500 hours on it. REcently I noticed an intermittent miss ONCE in a while. Nothing I could put my fingers on. About a month ago I noticed number 2 cylinder rising quickly to 1420 degrees EGT on takeoff. Normal is low 1300's. I pulled the power back and the EGT appeared to settle out normally, and behaved and looked normal for the rest of the one hour flight. I did reach in and pull out the number 2 injector on the preflight the next morning and blew through it just in case there was some blockage. I had sonic cleaned the injectors a week earlier. The subsequent takeoff had normal EGT readings, as did many after that. I assumed whatever had caused the abnormal indications was long gone. It was only because I was installing the Aerosplat air-oil separator and I had the cowling down that I happened to check the lower plugs. I had just cleaned them about 10 hours earlier.
As a precaution I have replaced all lower plugs, as I do fly at night and we are going back to Alaska this summer.
Vic
As a precaution I have replaced all lower plugs, as I do fly at night and we are going back to Alaska this summer.
Vic
![sparkplug1_zps7aad447a.png](/proxy.php?image=http%3A%2F%2Fi903.photobucket.com%2Falbums%2Fac237%2Fcadisy%2Fsparkplug1_zps7aad447a.png&hash=89a3453db920581d726a116daf2f067c)