In Reply to: Re: My first tractor (8n) posted by Jeff on June 24, 2018 at 08:53:50:
The diagram shows + ground - perhaps a drafting error? You can draw a lucid circuit diagram so you are no dummy when it comes to electricity. In any event it is working fine and the choice of grounding polarity doesn't matter a wit - leave it alone.
Your engine miss sounds like a fuel issue and do put a muffler on it.