Posted by DC Snider on October 06, 2014 at 09:27:49 from (74.36.69.251):
I'm having a terrible time getting this engine to start. It'll fire once in a blue moon but has yet to actually run.
Rebuilt engine and cylinder head, rebuilt carb, rebuilt mag from Nebraska Kirk. New plugs and wires from Brillman. Attempting to test run off a gravity fed temporary tank. I've even went so far as to spray gas staright down the carb throat with a windex bottle.
The owner's manual is quite clear that the impulse should trip at TDC or never anymore than 25/32" of a flywheel inch after the DC 1-4 mark has past the register mark on the flywheel housing. Mine is tripping well beyond that, perhaps nearly double. Way, way late in my mind. You can feel the piston has already started back down once it trips.
If I set the mag to 1:30 or so it doesn't seem to trip until about 3:00 or so, way late. If I turn it until it's about 12:30ish it's "against the pawl" ready to fire. If I put the cap back on it, crank it on over when the impulse fires it's on the trailing edge of the distributor block contact, still to late. The piston has already started back down. Seems like the impulse only engages twice per revolution.
I know the crank and cam are timed correctly, even took pictures of it before I put the cover on it. My attempt at keeping myself from second guessing myself down the road.
I'm beginning to wonder if I should just forget about the DC 1-4 mark and set the mag at the point I feel the piston has reached the top of it's stroke?
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