Posted by chevy_cowboy on September 13, 2010 at 12:45:36 from (75.129.228.150):
Hi guys, last week I bought a '49 H, the tractor is well used, but started and ran fine for the last several days.
Yesterday it died once on me, and wouldn't refire. I pulled the cap off the magneto and found a couple chunks of dirt dobber nest inside, cleaned that out and put it back together and it fired right up. I thought I'd solved the problem. Later that night I was showing the tractor to a friend of mine and it started ran about 90 seconds and died suddenly. Nothing we did would make it fire again.
I immediately suspected the magneto again, but testing the coil wire and a couple spark plug wires against the block they're sparking... but its a orange spark, not the bright blue I'd expect from a distributor. Is that normal for a magneto?
Any ideas on what to try from here? I'm a pretty decent mechanic but these tractors are way before my time and I've got alot to learn!
If it matters the tractor is pretty much all original except for a old 12v generator conversion that was done in the 60s according to the seller.
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