Pretty good day - I think.
Got the bay cleaned out for the scag work, including enough horizontal surface. Actually got the Scag running and didn’t do any major mechanical work. Closest we came was pulling the flywheel to check the key. Perfect. Just scratching our heads and going back to believing it was a timing issue. Did tweak the valve adjustments.
Problem is electrical. Pulled the black leads off the coils and it cranked and started. Apparently, the electronic module has gone bad again. Current one replaced last Oct. The module, via these leads shuts down the engine. Sadly, I had dismissed this module as being the problem as my only prior experiences were no crank at all. So now it starts just fine and when keyed off the fuel solenoid is triggered and engine dies. Replacement module on order.
Possible good news on my LS tractor as well.
I ‘ve always viewed as a complex issue, fuel starvation, somehow with a temperature component, leading to electric chaos. Could ECU be suspect? My wallet hoped not and tech reflashed. So with the hood up, Jim and I walked thru. Light bulb moment. What if the ECU was over heating due to its location so near radiator?
That could trigger a fuel sensor, it could become progressively more frequent as the temp went up, recovery would improve as temp normalized, and it could trigger electrical weirdness. Sound reasonable? I’m hopeful.
Tomorrow I will look to install a 12vdc fan in vicinity of ECU.