This 6.0 hp mower model #917.388013,it will start then only runs while you pump the primerbutton.I have replaced the plug, put new hi test gas, dissembled the carb and cleaned every port and the nedle valve at the bottom of the carb. The float has a small spring attached to the neddle . I start it with the air filter off. Please help? Jake

Hi,
If you have to push the primer, the jets are still not clean.
Peace,
Clarke