You don't really need a gauge, you can just snap an air hose onto the fitting on plug. I should have said, you take an old spark plug and smash the guts out of it to braze a fitting on it. Far as the gauge I use, I hook my air hose onto my gauge assembly and then there is another quick coupler on the other side of the gauge and I snap that onto the modified spark plug. This is not a compression test, it is a pressure leak down test. My gauge set up has two gauges with an orfice between them and I can tell the percentage of leakage from the cyl. They all leak some past the rings but should not leak past valves and definetly not leak into cooling system. You look into the radiator for leakage. It gets a little more complicated than that but this is a quick rundown .
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Today's Featured Article - On the Road with Dave Gohl: Tractors and Farming - by Dave Gohl. I never thought I'd live to see the day, when I could call myself a farmer. What allows me to say this? Well, when our family moved to our 20 acre site near New Prague, Minnesota, I had one thought in mind. You guessed it, farm it somehow. A little history is in order. In my younger days, mom, dad and my brother made frequent visits to dad's youngest brother Pete, who took over the home farm from grandpa MIke. It was the typical set-up, milk cows, pigs & chickens. In the winter, we'd play
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