My Scott lawn mower will not stay running for more than 5 sec. I have newer spark plugs, air filter, oil changed, and new gas?! What next? Clean and rebuild the carburetor. It works great now. Model Series 1216xx Type 0015 through 0668
Mr Gasket Sheet @ Amazon: https://goo.gl/Q23azY
Here are the procedures:
1. Remove carb bowel nut, float pin, float, needle, seat and welch plug.
2. Clear jets, valves and all passages with wire
3. Clean jets, valves and all passages with carb cleaner and clear all with compressed air
4. Replace float pin, needle, seat, welch plug and gaskets