[Mr Bob]

Rebuilt my 149 engine during the summer. Set the timing while it was on the work bench. Far easier than setting it while in tractor. When starting tractor, it some times kicks back and a slight poof noise in the air filter. Seems the timing is a little advanced. Do you make the point gap more narrow or wider to retard the timing? Once running, it takes gas good and idles as well as could be expected so I do not believe it is a carb. issue. Thanks in advance for your help and have a great day.
Bob