Model #24737031 Craftsman walk behind lawnmower, gas

Question and Answers


Can I take the thermostat out to fix the problem? 24737031 Craftsman Lawn mower


Thank you for your question and I understand your concern.

If your mower is less than 2 years old from the date of purchase, the repairs will be covered under the 2 year warranty. 

The oil leak is not caused by a choke issue and not likely causing the hard starts. Removing the choke thermostat will not likely resolve the smoking if it's burning oil. If the crankcase is overfilled with oil, it will smoke. If the choke was not opening all the way, the engine would run very rich and smoke but it would not run very well. You could remove or disconnect the choke linkage to the carburetor but you would have to keep the choke wired open and then it would cause the engine to be hard to start when the engine is cold. 

You did not state where the oil is leaking from so I will not be able to say what the cure would be for stopping the oil leak. It could have a cracked engine block or a seal leaking. If the engine block is cracked, it would have to be replaced. If the oil is leaking past a seal, the seal may need to be replaced. A broken or stuck piston rings could also cause oil to blow out past any seals or blow out the exhaust and smoke. There is a breather assembly attached to the side of the engine that could be restricted causing oil to blow out too. Remove and clean the breather assembly. 

If the thermostat is opening the choke after it warms up and it continues to smoke, the piston rings or the cylinder walls could be scored. 

I suggest taking the mower into your nearest Sears Service Center or Sears store to have it diagnosed and repaired. Remember if it's less than 2 years old from the date of purchase, the repairs will be covered under the 2 year warranty.

I hope this information is helpful.

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Joey S -
Sears Technician
April 07, 2014

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