I am new to this forum so thank you for letting me in. I am
a Technology and Engineering teacher in a small town in Wisconsin. We do not
have an auto program here but we do a few projects with engines. Our last
project was an airboat, we built everything; the alum. hull, cage , stand,
trailer. We powered the airboat with an EA81 Stratus engine, redrive and
warpdrive 3 blade prop.
We rebuilt the engine, got it finished and it ran great, no
choking on starts it just fired right up and purred like a kitten. Has new
plugs (gapped correctly), new wires, new coil, new distributor, new starter
solenoid and new battery. Like I said it ran great, so I go to start it on a 60
degree day and it won’t start, tried again and again, then all of a sudden
while turning the key back to the run position it starts. Let it run for a 15mins
and shut it down. Next day I put a spark light between the spark plug and wire
on #1 . Went to start it same thing, no spark (fuel pump is running and is
getting fuel when I pump the pedal). Multiple times this happens then out of
the blue it starts. We are running a split wire to the coil +. Run position with a resister and a starter
wire coming directly from the ignition post on the starter solenoid. I did try
a new key switch with the same results.
So that you know once this engine starts it runs great and I
can shut it off start it up without any problems but if it sits for 3 or 4
hours it becomes the same old thing.
Could this be a problem with the coil,
maybe the ignition module in the dizzy or just a grounding problem ( we have
retraced ever wire multiple times.
Tested the coil today zero on primary, 9.560 on secondary
Any help would be greatly appreciated