ZDZ 80RV ?Ignition problem
I have a ZDZ 80RV (from RC Showcase) which i think has an ignition problem. it is still on run in fuel (32:1, 95 octane) and is about 5 hours/8 months old. It has run well, until until it died very suddenly on 3/4 throttle at the start of an immelman last weekend. 2 prior flights the day before had some intermittent rough running a few times at half throttle.
tested spark - obtained 2 or 3 sparks consecutively, then none for many rotations, then 1 or 2 and then none and so on. (spark plug removed from cylinder head and prop turned by hand at this point.)
Ign. battery and switch cheked out OK (5.2 volt (NiMH 4 cell Sanyo 2300mAH) present at the plug where ign plugs into. Ign battery still had 1700mAH left in it when tested at 0.5amp discharge later on.) I had noticed that ign battery was using about 250 mAH per flight for the last week which i thought was rather high current usage, but i had only just started monitoring this so i didn't have a baseline. Battery voltage dropped to 4.85 v under 0.8A load (acceptable load test).
when i test the spark now, (by rocking the prop to & fro past the hall sensor with spark plug out of head) i get a spark every time. same if i do it with a new plug. this makes me think the plug and lead is OK, and perhaps the ignition "heated up" and failed in flight, but is OK now after a day to "cool off". is that possible?
could the spark be too "weak" as it won't even fire/start at present. what do you think?
ADDITIONAL INFO: a friend has a brand new ign for ZDZ 40-50 size engine. can i run/try this ignition module in the 80?