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Now get this one. When I was a kid, this old man had a lawn mower that
wasn't getting enough spark to start. I know this sounds like a tall tail
but he took the plug wire in one hand & put a finger from his other hand on
the spark plug & it would run. Don't know if anyone has been zapped by a
spark plug, but it hurts. Didn't bother him a bit. That's how he checked if
there was spark. Geeze. If I didn't see it I would be thinking what you all
are thinking.
Yeah, it was throwing some fuel, but wonder if fuel pressure is right... I
dunno, maybe squirt some gas down the carb while you are cranking just to
eliminate fuel altogether... Still, it does sound like a timing chain,
don't it? Cough pop cough...
Perhaps if you would fill up with quality Sinclair gas, that would
eliminate those rough running and stalling issues.
LOL...
One way to tell the condition of the timing chain is to pull the cap off,
turn the engine one way by hand until the rotor moves, then slowly turn
back the other direction until the rotor moves the other way.
The two tools that I always use to diagnose engine problems are a
compression tester and vacuum gauge. The compression tester will reveal if
the chain jumped because at least a couple valves will be open when they
shouldn't be. To my ear it cranks normal, probably nothing wrong with the
chain.
I would also suggest checking the condition of the distributor itself. If
the bushings are worn it will wreck the points and the ignition timing will
be all over the place. You probably don't have a 6v timing light but that
reveals a lot about IGNITION(not valve) timing.
Just had to do that the same way on a 92 ford 6. It may be electronic ignition but checked timing chain the same way by watching the rotor. Engine basics will always be in order to run. Even with the low flow mechanical fuel pump looks like enough to start and run.