Several variables are in the mix of compression pressure. The following list is not complete. Speed of cranking Throttle wide open Number of strokes for reading Accuracy of gauge*** Warm or cold Run recently (weeks) or not months/years method of gauge attachment to hole
Your pressures are for sure in alignment with expected pressures on that engine. and close to one another. I would say no issue in those readings. Jim
*** gauges can be 20% different from perfect actual pressure, including both cheap and expensive gauges. Mechanics check their gauges against a master gauge periodically. Jim
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Today's Featured Article - Product Review: Electronic Ignition - by Staff. Oil, for example has come a long way in the last 50 years and I don't use anything but the latest API grade available. I've heard the arguments for non-detergent oils but would never trade it for today's formulations. Paint is another, the modern acrylic enamels are great for resistance to grease and fuel stains, retaining their shine and they last forever; unlike enamels and lacquers . Still another is the alternator. No doubt using the original generator keeps the tractor pure, but for thos
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