So this last fall I had my Massey fired up to be entered into the local fair and the battery was dead. I jumped it to get it to the fair and again to get it home. I then plugged it into my battery maintainer for a nice slow charge. Fast forward to early winter and the tractor will not start. Fast forward a little, and I find that I have no spark.... I suspect the ignition module as it was used when I installed it back in 2010, and jumping the coil gave me a spark, I had my son install my new (spare) module to see if that fixed it. He did not bolt in in place, and because there was no ground, I figured he fired the new spare one.
So I start buying parts in disgust... first a brand new ignition module... no spark.
Then I tried my spare converted SSI coil that Ed Stoller modified for me... no spark.
I remove another modified SSI coil I had on a OH140 motor... no spark.
I contacted Ed Stoller and bought a new hand made pick up coil and installed it... no spark
I then bought a brand new coil even though it would spark when jumped, and when the ignition module was cycled off with the key... no spark!
Just for kicks, I even put a new key switch that I bought and had not used yet (I liked it better)... no spark
I tested every damn wire for position and continuity, all was in place and good.
I then switched my test meter to 12V and planned to check the switch and 12V at the wired too... well, I like to test the meter by touching the battery first. When I did this, I noticed my test meter read -12v? I went out to my Jeep and checked the meter, yep... sure enough the meter is reading normal 12v! I go back out and recheck a few times and the battery cables are correct, but I swap them backwards and giver her a shot... Damn if I don't have spark now!
What must of happened is that when stone dead, the battery maintainer was confused enough by the lack of polarity, it charged backwards! Now apparently the starter is not polarity sensitive because it was cranking the motor over in the correct direction too!! I unplugged the ignition module and left the rear parking light on to kill the battery stone dead and then I will have it recharged and see if it will recover before I buy a new one. I have been messing with this for a couple months now, and live in Connecticut. If anyone has missed it, we have been getting a little bit of snow as of late! so far this month we have about 40" dropped on us, and I kinda miss the snowblower!