Ignition failure
I just replaced the CDI unit with a spare that I had on hand (cheap $25 units from China)…Yesterday, the engine suddenly wouldn’t start…Putting a double-handle super starter against the spinner only resulted in backfiring – like the timing was way out of whack…While installing the new CDI, I discovered the ‘real’ problem…I’m using a 2s Lipo for ignition, and ran the output through a $20 CC 10amp BEC set at 5.4 volts…One wire on the input side and one on the output side had broken at the solder on the PC board!…I don’t think those tiny voltage reducers with tiny wires were meant for gassers…I reordered another spare CDI – this time an RCEXL for BPMR6F from Valleyview…Regarding CDIs and what kills them, is my understanding correct?
Vibration
Input voltage too high
Sparkplug cap not secured to plug
Anything else?
-Ken