Spark plug failure
#1
Thread Starter
My Feedback: (1)
Spark plug failure
EME 55 with about 5 tanks thru it installed in a 95" Howard Ike. Flight # 6 and it wouldn't start. Cranked it for about 15 minutes before giving up.
When I got it back to my shop I pulled the cowl, then the plug and attached it to the cap. When I rotated the crakshaft past the magnet, I got two sparks. One weak one from the tip of the electrode and a strong one from the hexagon base straight into the cap. I believe this is called leakage.
New plug tested in the cap produced a good spark at the electrode and then installed in the engine and it started right up as good as ever.
Has anyone ever experienced this before?
When I got it back to my shop I pulled the cowl, then the plug and attached it to the cap. When I rotated the crakshaft past the magnet, I got two sparks. One weak one from the tip of the electrode and a strong one from the hexagon base straight into the cap. I believe this is called leakage.
New plug tested in the cap produced a good spark at the electrode and then installed in the engine and it started right up as good as ever.
Has anyone ever experienced this before?
#4
My Feedback: (3)
Perhaps this video of a sparkplug factory in China might give you a clue. First thing we toss won't even run for the first time with them.
https://www.youtube.com/watch?v=is63QOaUkTw
https://www.youtube.com/watch?v=is63QOaUkTw