eblc1388
Active Member
Your starter motor is only going to be able to spin the crank at some given maximum RPM. Detecting the RPM and checking for rotation that is well in excess of that should work. The Bendix of the starter should release from a slight overspeed I'd think.
Dean
I agree with Dean. The load on the starter motor will reduce dramactically if the engine has started and is running on its own.
Just sense the starter current to determine this condition.