Posted by Fritz Maurer on September 27, 2012 at 19:55:44 from (216.137.138.178):
For years I hated that little Tecumseh OHV140 screwed to my Miller Roughneck. It had this weird flaccid stumbling at high idle, but would smooth out under load when an arc was struck. That was with a new plug. As time went on, it would get worse until it was impossible to run a bead with all the backfiring, and also getting harder to start. On the way to a service call one day, I stopped and got a new L-48 so I wouldn't have the aggravation of starting it first thing in the morning. It started ok, but was running worse than ever. Besides all the backfiring, I had to have a helper momentarily close the choke every time I struck an arc, or it would quit every time the throttle snapped open. Mercifully, that was a small job and I was out of there in a couple hours, but I was determined to chop that engine up when I got home. Later that year, I needed that welder real bad. I grudgingly pulled it out of the corner where I had stuffed it, knowing what I was in for. The spark plug had gotten broken somehow, and as I started for the mower shop, I noticed a discarded plug mashed into the driveway. I thought I would just clean this one up since I only needed to run the welder a few minutes. It was a long-reach NGK from one of the snowmobiles, and I had to put about six gaskets on it so it would be short enough to fit the Tecumseh. And friends, that nasty old NGK cast a spell on that motor... No-load top-end completely smooth, no more silly antics, starts with piece of rope (never before possible)... that plug is in the engine yet today. All the years previous the plugs were Champions. My rather lengthy question, how can such a simple thing as a piece of wire through some porcelain be so radically different between manufacturers? I refuse to believe that Champion is a junk plug, but the results are what they are.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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