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Rkymtn, Were these motors sitting for a long period of time?. If so, that will make for low compression. At least the compression is close on each cylinder, that’s a good sign. If you can start that engine, let it run for awhile, so the rings reset themselves, just make sure the engine doesn’t overheat, or take out for a boat ride. When done testing motor, check compression, should be better than 50psi. Let it sit for awhile try starting when motor cools off. Compression should be as high as it’s going to be. If it stays at 50 or below, then it’s time to check rings or overhaul. I agree with Tubs, compression should be at least 60psi. If you are going to buy some gauges, or tools, pay the extra dollars and buy name brand stuff, you only buy them once, just my 2 cents worth. Gene.