I have a mystery. I have a 1976 7016H Simplicity. It has a 16 H/P 326431-0190-01 engine. It has poor spark. If I hold on to the end of the spark plug wire with my hand, while turning over the engine, I get a slight jolt from the wire. It’s not much of a jolt at all. I have an in line spark plug checker, the type with a light bulb in it. There isn’t enough voltage to light the light bulb. I set the sparkplug checker on another one of my tractors, the light bulb glows as it should.
I have replaced the coil, the voltage regulator and it has a new wiring harness. The coil is gapped at .012. I gapped it at different times .008 through .014 with feeler gauges, and the spark did not improve. It has a new electronic ignition module. I tried the electronic ignition on another tractor, and it worked fine. I tried the points and the spark did not improve. While turning the engine over, I grounded out a new spark plug. It had no spark. I grounded out the sparkplug wire against the engine block the only spark that I could see is when I completely grounded out the wire. If I pulled the wire away from ground, it would not spark. No spark jump. I removed the nut on the flywheel and then examined the 3/16 key. The key-ways on the crankshaft and the flywheel lined up so the key has not sheared. So I now can presume that the timing is still good. I tried to remove the flywheel today with a gear puller that applied force to the crankshaft, and with 5/16-18 threaded bolts to the flywheel. Not a 3 jaw type gear puller. It would not move even after heating the flywheel with a propane torch. So I can presume that the flywheel has not rotated on the crankshaft. I am not going to attempt to remove it unless I have a good reason.
I would appreciate any advice on this. Does anyone have any ideas for me? Thanks in advance for the help and for reading this through.