jd214 runs well for about 15 min then runs very rough.

[jd214]

my 214 stats fine, runs fine for about 10-20 mins,then runs rough no power shakes, parts i have replaced, muffler,points, condenser, carb, coil, some wiring, seat switch is disconnected, fuel cap is ok/ plse help someone, getting fed up. thnx

 

[RetiredCarGuy]

Sounds like coil failure at high temperature. Bad or contaminated fuel also.

Can you access the coil? To heat it carefully with a hair dryer right after a cold start. Carefully, not to damage it or anything nearby!