Lawn mower won't run after gas tank overfill

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  #1  
Old 08-02-15, 09:46 AM
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Lawn mower won't run after gas tank overfill

I have a lawn mower with a Briggs & Stratton. Sent it to repair shop and had carb rebuilt ~1 month ago. Yesterday, when filling the tank it overflowed pretty badly and it would not start afterward. Some gas got into the top of the mower where there is a circular vent and something in there spins when you pull the cord.

Today it's the same story - won't run. Swapped out spark plug and it tries a little harder but dies before really getting running. Have also tried starting without air filter.

What is likely to be the problem considering the gas tank overfill seems to be the likeliest culprit?
 
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  #2  
Old 08-02-15, 10:30 AM
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The over fill wouldn't cause problems in itself, but the gas that spilled over may be causing a flooded-like condition. Gas that gets into the air intake would be a problem

First check the oil level to make sure it hasn't been contaminated. If the level is high change it. Then remove the air filter.
Then with no choke and full throttle see if it will try to start. It may take a number of pulls. If it tries to start but dies go to half choke and full throttle. It should take off and run.
 
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Old 08-02-15, 02:15 PM
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This model has neither a throttle nor a choke. It looks like gas got into the oil. I'll try a change, thanks!
 
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Old 08-02-15, 02:40 PM
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Also remove the air filter when you try. If it's saturated with gas it will contribute to starting problems.
 
  #5  
Old 08-02-15, 07:00 PM
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If you had the carb rebuilt and there is gas in the oil, then it needs to go back to the mechanic to get the carb fixed under warranty because the carb is leaking.
 
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