Originally Posted by
smkrcflyer
Ran it today at WOT and it ran for a few seconds then backfired and thru the prop nut. My setup is LS two turns in from outer edge of plastic arm, HS four turns out.
If the engine started & ran it isn't out of time. 1 tooth it is out 15 crankshaft degrees and the engine won't run that far out of cam timing.