My lawn mower will only start if it has been primed but will not stay running. It has a new air filter, plenty of gas and oil. I have mowed my lawn at least 6 times this season but the last time I tried to start it, acted like the engine stalled.
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Clean the carb, gas tank and fuel line (s). Replace air filter with a new one, I wouldn't recommend that you run it without the filter because that allows dirt and grass debri to enter the carb, fuel line and gas tank. Replace the plug with a new one that is recommended for your engine. Check oil level.
Sounds like the automatic choke to me. When it acts up next time, remove the air filter, and observe the butterfly valve on the carb. Hold it open with a screwdriver, and see if it starts and runs. I have found that wireing the thing wide open solved my Toro problems. The mower is still under factory warrenty however, so you can always take it back! Hope this helps my friend!
I got a new air filter for mine today, plus cleaned out the metal fuel canister under the carburator and the little brass bolt and my mower started right up. I was having hte same problems getting my mower to run and stay running. Glad I checked this site!
The problem is that the gas that sat in the carb all winter glazed it over and gummed it up. Begin by going to any auto parts store, like an aiutozone, and getting a bottle of carb. cleaner. Seafoam is one I use. Add it to your gas, one ounce per gallon of gas. Also, pick up a can of engine starting spray.
Remove the air filter and spray the engine starting spray into the air intake. Pull start the engine and give it additional squirts of engine starting spray until it runs smoothly.