Went flying last Sunday, and after I put the plane back in the hangar I repositioned the prop to a horizontal position, as I always do so that my hangar-mates won't drag a wing on a prop tip. When I moved the prop I only heard a single "clunk", instead of the usual "clunk-clunk" as both impulse couplings release in sequence. I backed up the prop several times and moved it through top dead center with the same result. Before and during the flight the engine started normally, ran fine, and had a normal rpm drop on mag check.
I'm not starting the engine again until I have a mechanic look into this, but I'm curious if any of you have had this problem. By the way, the mag with the problem is only a few years old and has about 200 hours on it. All ADs have been complied with on both mags. Thanks. wct
