ArVeeNiner
Well Known Member
I have an O-320 B2B and I?m running Autolite by Unisom URHM40E spark plugs. More often than not, when I do my run up, I have a fouled plug. It is usually plug 2 bottom. I?ve had it so bad on three occasions that nothing I can do during my run up clears it and I have to pull the plug and manual clean it.
I taxi as Lycoming recommends (1000 rpm, leaned) and I lean in flight. I have to admit that I don?t always run it up to 1800 rpm before shut down as Lycoming recommends but I do occasionally with the same results usually.
I?ve checked on line and I see recommendations for the Champion REM37BY plugs. These are cooler running plugs than my Autolites so it?s counterintuitive to me. Both plugs are approved by Lycoming for this engine.
Does anybody have any recommendations?
I taxi as Lycoming recommends (1000 rpm, leaned) and I lean in flight. I have to admit that I don?t always run it up to 1800 rpm before shut down as Lycoming recommends but I do occasionally with the same results usually.
I?ve checked on line and I see recommendations for the Champion REM37BY plugs. These are cooler running plugs than my Autolites so it?s counterintuitive to me. Both plugs are approved by Lycoming for this engine.
Does anybody have any recommendations?