The sensible way is to find TDC, as described below, and find the rotation point at which either an inlet or exhaust valve opens and check it out with a dial guage (or some other device). Easy to measure degrees - either a large circular disk and pointer, or measure around the flywheel and calculate appropriate distance, or use flywheel bolt spacing, if symetrical. Lots of ways to do it really. Just depends on what is to hand. Overlap of valves is another possibility.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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