Model #917271820 CRAFTSMAN Lawn, Tractor

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Question and Answers

Q:

what should I check when the engine starts running one of two cylinder? 917271820 Craftsman Lawn tractor

A:

Thanks for the inquiry and for using SearsPartsDirect.com.
I agree that the coil is the most likely cause for the engine running on one cylinder. It's actually pretty easy to check.
Just remove the plug on the suspected cylinder and reattach the plug to the plug wire when removed. Ground the base of the plug to anything metal like the cylinder head. Turn the key to Start without actually starting the tractor and you should see spark from the bottom of the plug. If there is no spark, the coil will need replacement. 
Hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
August 06, 2014
Q:

I have a Craftsman Automatic Lawn Tractor, model #917.271820,

A:

I know how important it is to have a good working tractor in your home so that you can keep your grass maintained. While you are waiting for an expert answer, I did manage to find a link that will provide you with some good information about what may be causing your problem. Hope this helps!

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Priscilla V -
July 30, 2012
A:

Thank you for you question.

I am sorry you are having a problem with the tractor. I am not sure how the seat switch was bypassed. If some one just tapped, the switch down it could have come loose or the connector might have come loose. I recommend checking this area first. The reason I mention this is the only way to truly bypassing the switch is by cutting wires. If they have been cut please let me know where they were cut and it they are tied together or not. If it is bypassed, I recommend tracing the wire from the seat switch to the brake switch. The wire has to be touching ground along the line.

I hope this is helpful. Please let me know if you need further assistance.

Thank you for using Manage my life.

Mark T.

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Mark T -
Sears Technician
July 31, 2012
A:

Mart T. Thank You for your fast response on my mower 917.276020. The seat switch wires were cut and are put together with a wire nut and electrical tape. I check this connection and it is still good. I will trace the wires from the seat switch to the brake switch as you have suggested. In the meantime would you have another suggestion that may be a solution? Thank You

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william -
August 01, 2012
A:

This model has a relay in the system. If the rely is not getting 12 volts on terminals 85 and 86 the engine will stall when the clutch is released. First remove the relay and start the engine. If the engine still runs the problem is in the relay circuit. When 12 volts is applied to terminals 85 and 86 on the relay, it should close the contacts between 87 and 30. If you have 12 volts on 85 and 86 I recommend replacing the relay.

Please let me know what you find.

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Mark T -
Sears Technician
August 02, 2012
A:

Mark T Thank you so much for your help. We replaced the relay as you recommended and that was the reason the mover did not continue running as the clutch was released. Thank You again for all the help

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william -
August 08, 2012
A:

William,
I am glad to hear the tractor is up and running. Please let me know if you have any other problems.
Thank you for using Manage my life.
Mark.

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Mark T -
Sears Technician
August 08, 2012
A:

I have the same symptom: my mower will not continue running when the clutch pedal is released and/or when the PTO switch is activated. Mark T, or other expert, please elaborate on testing the "Operation presence relay, PART NUMBER: 109748X" (maybe the name should be "operator presence relay" but "operation" is what is in the parts list). When I remove the relay, I can start my engine, but neither the PTO or drive engage. If the engine will start without the relay, does that mean the relay is definitely bad? Also, when I remove the relay, engine off, but turn the ignition switch on, there is 12 volts on 85, but nothing on 86. It seems that 85 is fed from the operator seat switch. What feeds 86? If with the relay removed I am only getting 12 volts to 85, does that mean the relay is bad, or that the circuit that feeds 86 is the problem. And just so I understand, what does closing the circuit between 87 and 30 actually do?

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Anonymous -
July 23, 2013
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Q:

My riding lawn mower will not stay running.

A:

Spring is finally here and here comes the grass. It is always a little frustrating when a lawn tool starts acting up on us. I'm sorry to hear that you are having some issues with your Craftsman riding tractor. I did some research at Managemylife website and found an expert answer to a similar question that may help until your expert can respond. I have attached the link below so you can check it out. If you do decide to schedule service and have a qualified technician assist you, I have attached a link to SearsHomeServices.com. I hope the links below will help

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James -
March 16, 2012
A:

Thank you for your question.

Your Tractor uses an Operator Presence (seat) switch that will cause engine to stall if blades are engaged or the brake is released without anyone on the seat. If ample amount of weight is not kept on the seat during operation or the operator is leaning forward the tractor will stall because the Operator Presence (seat) switch senses that the operator is not completely on the seat.

To check Operator Presence (seat) switch:

  1. Lift seat.
  2. Locate wires that connect to Operator Presence (seat) switch under the seat.
  3. Disconnect and clean any debris in the switch connector. Use an ohmmeter to check the switch. When the switch is not pushed, the reading should be 0 ohms (closed). When pushed it should read ol ( open load )
  4. Make sure the connector is fully seated on the seat switch. The connector is a special connector that will short the two wires if it is not fully seated.

I hope this is helpful.

Please click on the following link to order the 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 .

Please let me know if you need further assistance.

Thank you for using Mange my life.

Mark T.

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Mark T -
Sears Technician
March 17, 2012
A:

I have a Craftsman Automatic Lawn Tractor, model #917.271820, and I have the same issue as this person and the Operator Present Switch was disconnected by a service tect two year ago, however the mower is now doing the same as this person is stating above without a Operator Presnt Switch. There must be some other issue that causes the mowor not to continue running when the PTO and/ or the pedal clutch is released. Plese Help

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william -
July 30, 2012
A:

Thank you for you question.

I am sorry you are having a problem with the tractor. I am not sure how the seat switch was bypassed. If some one just tapped, the switch down it could have come loose or the connector might have come loose. I recommend checking this area first. The reason I mention this is the only way to truly bypassing the switch is by cutting wires. If they have been cut please let me know where they were cut and it they are tied together or not. If it is bypassed, I recommend tracing the wire from the seat switch to the brake switch. The wire has to be touching ground along the line.

I hope this is helpful. Please let me know if you need further assistance.

Thank you for using Manage my life.

Mark T.

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Mark T -
Sears Technician
July 31, 2012
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