Motor starts, runs at idle speed pretty good, a little rough. When increased to full throttle the engine will go to full throttle for 5 - 15 minutes then drop back to 50%. From there on it will cycle.<br />Have replaced the fuel pump, carb. kit, points & condenser, plugs and one coil that was loose.<br />Points and plugs were set to manual specs. The motor did the above describe before all the changes.<br />What am I missing? Do I need to check the carb. again? Could it be vacuum problems? Pleas help!
