Model #917371940 CRAFTSMAN Walk Behind Lawnmower, Gas

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Question and Answers

Q:

lawn mower model # 917371940 sputters when starting how to troubleshoot?

A:

I understand how concerning it can be when your lawn mower begins to sputter. While you are waiting for an expert to respond, I have attached some helpful links below that may provide information to assist you with your question. Have a great day!

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Alina F. -
July 17, 2012
A:

Thank you for your question on the walk-behind mower engine.

Please make sure you are using fresh fuel and if it is sputtering like it is getting to much fuel then I would recommend removing the air cleaner cover and examine the paper air cleaner for dirt, grass and oil build up.

If it is very dirty or saturated with oil then I would suggest that you replace it.

If the engine will run cleaner with the air filter off then I would suggest replacing the filter. Please to not run the engine for mowing with out the air cleaner in place.

If the engine is starving for fuel and is dying out then you may have to clean the carburetor and the draw tub orifice in the carburetor bowl to get it to run better.

If you leave this new fuel in the engine for a long period of time it will cause problems inside the carburetor.

Please let me know what you find out and we can continue to troubleshoot with that information.

Sam A.

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Sam A -
Sears Technician
July 20, 2012
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Q:

Do you have a manual for Craftsman/Briggs and sSratton engine model# 917.371940?

A:

I know this type of information can be very helpful for you to have. While you are waiting for your expert answer, I did some research on the unit. I was able to locate your owners manual. I attached the link below. Your expert will answer within 24-48 hours with detailed information. Thank you for using Manage My Life.

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Jackie S -
October 20, 2011
A:

I see Jackie provided you with a direct link to the manual for your mower. If you would like a hard copy of the manual, one can be purchased from the following link Sears PartsDirect . I hope this helps.

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Korinna S -
Sears Technician
October 20, 2011
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Q:

My 6.75 Craftsman lawnmower won't start. I have tried almost everything suggested in Manual.

A:

Lawn mower's can seem almost stubborn at times. I see you are having problems getting yours to start. While you wait for the expert to review you might check a previous expert post in the first link below. I also added a tune up video that may help.

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Barbara H. -
August 21, 2011
A:

Walk behind mower will not start.

I am sorry to hear your mower is giving you problems. Please use the following information to help get this issue resolved.

  1. Make sure to use gas that is less than 5 weeks old. gas will start to break down and become less volatile. If the gas is old drain the tank with a turkey baster and refill with fresh fuel.
  2. Check the air filter and replace it if is not dry or clean.

If the engine does not start, you need to determine what is causing the problem. The engine need three things to start and they are fuel compression and spark. Use the following instructions to determine what is missing.

The first check is going to be if the engine is getting spark. Remove the spark plug from the engine and connect it to the spark plug wire. Use a pair of insulated pliers to the base of the spark plug against a metal part of the engine. Now have someone pull the starter rope or engage the starter if your engine has one. When the engine is turning over you should see the spark plug spark. If the plug does not spark, disconnect the spark plug and insert a screwdriver into the boot of the spark plug wire. Make sure to hold onto the handle of the screwdriver. Hold the metal portion of the screwdriver close to a bare metal part of the engine. Now turn the engine over again with the starter. If you see a spark, you need to replace the spark plug. If you do not see, a spark most likely the ignition coil is defective.

Once you have determined the engine has spark you have to check for fuel. The easiest way to check for a fuel problem is to remove the air filter and pour a few teaspoons of fuel into the throat of the carburetor. Then try to start the engine. If the engine acts as if it wants to start or runs for a short time and stalls the problem with the engine is a fuel issue. Most likely, the carburetor needs to be cleaned or replaced. To clean the carburetor you have to remove the float bowl and spray the passages with carburetor cleaner and compressed air. If you are not sure how to clean a carburetor, you can use the following link to a video I found on cleaning a carburetor. Carburetor cleaning I have given this link as a guide it might not be the same as yours. I found this link and we are not associated with this video. If cleaning the carburetor does not cure the problem, I recommend replacing it.

If the engine did not attempt to start with pouring the gas in the carburetor, I recommend checking the compression of the engine. To check the compression remove the spark plug and tuck the wire out of the way. Hold your finger over the spark plug hole and turn the engine over. When the engine turns over the compression should force air past your finger. If the engine does not force air out part your finger there is an internal engine problem. I recommend having a service technician diagnose the engine.

If you have verified all three this the engine need to run and it will not start I recommend that you have the mower serviced. I hope this is helpful. If you need further assistance, please submit more details.

Here is a link to order any parts you need. Sears Parts Direct .

If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website: Sears Home Services .

Thank you for using Manage my life.

Mark T.

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Mark T -
Sears Technician
August 23, 2011
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