Compression pressure depends on a lot of variables including head style, piston head design as well as wear. A C113 engine to have 102psi would have to have a 6.9 compression ratio which is possible for a factory original gas C113; i.e step head pistons with a gas head. That is 100% efficiency for a 6.9 CR. To estimate what a compression test reading should be, multiply the compression ratio for the engine as equipped (piston design and head)by 14.7 psi which is one atmosphere pressure and then multiply by about 90%. If I remember correctly, the old distillate engines had compression ratios less than 5 to 1. That would put the expected compression reading to be below 70 psi and that engine will run like a top.
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Today's Featured Article - Talk of the Town: What's The "Stuckest" You've Ever Been? - by Edited by Kim Pratt. Another great discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I was about 14 (part of the problem) when I got stuck. I was disking with a cab equipped IH 966. The window was dirty and I was driving into the evening sun. It was hard to see and it was my first pass down the field. I got the tractor so stuck that the underside of the tractor was resting on the ground. My uncle wanted
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