Re: omc 4hp timing marks

[wedgie]

quote Chris_P:

Were points new?

No, I just polished up an old set. I think I have a new set here somewhere. Maybe I’ll put them in just for an experiment.

quote fleetwin:

Well, having the points start to open at the second mark means the point timing is at the retarded end of the spectrum. I would try to set the mark more towards the middle between the two marks. New points are usually set to the first mark (right mark in your picture) to account for initial rubbing block wear.
All that being said, I just wouldn’t expect a 4hp to idle as nicely as the older 3hp models, but resetting the points might be worth a try, too bad you have to remove the flywheel again to do it.

Using a timing fixture I did set the points to open in between the two marks, but when running, the timing light indicates it is firing on the leftmost mark. That leads me to believe I should set the points to start opening at the right mark, or do I have it backwards Don?I might be "at the retarded end of the spectrum myself" 😆

I’m just playing around for practice with the timing fixture and to see if it really does make a difference on idle.
I don’t mind taking off the flywheel again. Might be a different story if it was a big twin that needs 105 foot pounds torque.