Are you sure the coil is not the source of your problem? Coils can be checked with an ohmmeter or commercial tester. Why not use an in-line spark tester and observe the spark when the engine is running?? First make sure your plug wires are the original, metal core type; the carbon core ones don't work very well on tractors. Second, find a piece of clear plastic tubing (about 1/4" I.D. and 2" long), then cut a piece of plug wire long enough to go between the coil and the center tower of the distributor cap and cut it in half. Slide the ends of the cut wire into the tubing until they meet in the center. Replace the coil to distributor wire with your new "diagnostic tool" and start the engine. Gradually increase the wire end gap to determine the spark quality. You should be able to easily see if the spark is bright blue and steady indicating all is well. A good system will probably jump a 1/4" or better gap. the spark should be bright blue & "snappy". This really looks "cool" in a dark shed or at night!! This will work on either a magneto or battery operated distributor if the coil wire is accessible. You can also try one spark plug wire at a time as a cylinder diagnostic tool. Try it and amaze your friends with your "electrical diagnostic tool" all for about $1.00 or less.
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Today's Featured Article - Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
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