Honda 350ES

[steve shugart]

Hi all, my 350 starts missing pretty badly after about an hour of pulling my mower and will quit then restart after about 5 min sitting but still misses, overheating ?? I have done a MOD on the fan so now it runs continuous Any ideas are welcomed

[Mech]

Normally the first thing would be a standard tune..  Spark-plug, air-filter, valve adjustment, check for air-leaks at the manifold, check the tank breather, drain the carb looking for water and fuel flow, adjust the idle speed and mixture.

If it's just conking out when you throttle off, a tune might be all it is.

If it's faltering while you still have the throttle on, and you have a timing light, you could put that on and check the spark isn't failing once it's hot. If the spark is getting intermittent then that needs diagnosing. If the spark seems to be fine, and the plug is new, then it would be worth taking the carb off and cleaning it.