Hasn't anyone besides me noticed slightly more wear on the right tire with our left-turning engines? Or the opposite for right-turning engines? Until I came across the Deakin comment re the Bearcat wearing out the tire on the opposite side from the direction of prop rotation, I didn't have an explanation for my slightly uneven tire wear. If the prevailing winds at my home airport were opposite of what they are, then I would have had _that_ for an explanation and not wondered about it any more, but since it was still an open question in my mind - the penny dropped when I read Deakin's comment about the Bearcat.
My next mystery to solve is why good plugs go bad. I thought I was going to have to rebuild or replace my magneto a few months ago but the problem of a rough running engine when on the mag only was completely solved by replacing the plugs. They only had a little over 100 hours on them and looked almost like new after a bit of clean-up. But one was bad. Since I was replacing one set of plugs, I went ahead and replaced the bottom set too. Within a few hours of replacing the plugs, I happened to check my electronic ignition by turning off the mag at idle to see if there was any RPM drop or roughness. There never has been. But now there was. So again, I was thinking of everything but the plugs in considering the possible culprit causing my engine to miss when running on just the electronic ignition. The plug wires are 22 years old, as are the coils, so I was already replacing these components in my head when I bought another new set of Champion G59C plugs ($5.50 each!) and put them in, just so I could definitely rule out plugs. The ones in the plane had less than 20 hours on them, so plugs were at the bottom of my list of suspects. The new plugs, however, completely cured the problem, just as it had when the mag started running rough. I knew an A&P years ago who attributed all engine problems to "plugs." I used to make fun of him. Now that I'm older and wiser, I now understand the man was a genius. Mike ____________________________________________________________ Save on a home Heating and Cooling System. Click Now! http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTGKLkai8cCPZd2omzvVvrKCrjcbB5YiXJ01q4uzaO2NZEukSknbcE/