Jim Burns wrote:
It's my understanding that the old shower of sparks magnetos like our
engines have do not have impulse couplers. Maybe I'm wrong and that
was
what I heard.
Jim

That's true. I didn't realize you had a shower-of-sparks. In that
case you shouldn't hear the snap of an impulse coupler. That still
leaves the question of how you got the bendix to disengage by hand. In
my experience, you'd have to be a real he-man to spin the prop fast
enough by hand to get it to disengage. I've never been able to do it
when handpropping an engine that already had the bendix gear engaged.
Maybe that's a symptom of your problem (i.e. something not right in the
bendix system).

John Galban=====N4BQ (PA28-180)