Run Champ. plugs in the machines with out a problem. The main problem is fuel quality. Had similar problem with 706 changed fuel no problem after. The damage was done however by the time the barrel full was gone (kept using to get rid of). It went a good while with different fuel. till it started badly burning oil (badly burnt/broken valves).My guess (just that guess) to the cause of that from running bad fuel (ran engine to hot) that long before changing then the full (power) work knocked the now heat stressed valves apart(one had almost 1/4" chip). Full overhaul resulted.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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