Hello,<br />Newbie here ! I have a 1972 Chrysler 9.9 hp model 92HD that is making me crazy. I bought this motor not running with no spark.Pulled flywheel, found condenser wires rubbed bare by flywheel.Replaced points and condensers.Gapped points at .020. Rebuilt carb with kit.Replaced spark plugs. 
Motor runs great at mid to high rpm.When I try to idle motor down it does.It idles great for about 10 or 15 seconds,then it misses,stumbles,then picks back up some rpm.It usually then misses again and dies.Carb adjustments do not seem to help.Set link and synch according to manual,actually made problem worse. Well experts ,what do you think?
Motor runs great at mid to high rpm.When I try to idle motor down it does.It idles great for about 10 or 15 seconds,then it misses,stumbles,then picks back up some rpm.It usually then misses again and dies.Carb adjustments do not seem to help.Set link and synch according to manual,actually made problem worse. Well experts ,what do you think?