Good job following directions. The 145 is low but not to be considered out of bounds for an engine not running well. I give the compression at this point a B grade. If the oil seemed thin, it is probably multi viscosity oil like 10-30. That oil stays thin at cool temps. If there was no coolant in the bottom of the pan when the plug was opened, I think the internals and gaskets are good enough to get it running correctly before replacing the head gasket, or going further into the interior of the engine. I ask you to consider leaving it together enough to start and run until the engine is stable and running cleanly. The compression indicates it can do that. A single place that can cause dramatic issues with spark timing and running condition is the distributor shaft bushing. If it is worn, the distributor 6 lobe cam will be wobbly and fail to open the points correctly. The test is to see if it will wiggle by hand at all. Take off the distributor cap and rotor. With good light on the rotor shaft, look at the point rubbing block and cam. Wiggle the cam toward the rubbing block and away from it. Also up and down, and toward the block and away from the block (not in and out). Any play in these directions at all is not allowed, and requires a rebuilt distributor. A dial indicator placed on the shaft perpendicular to the shaft should not show more than .001" of movement as the cam is wiggled. Keep doing tests, we are saving you money and giving you context specific education at the same time. Jim
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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