Why does my craftman riding mower withut off when i engage the mower lever i have replaced the seat switch and the interlock switch

Lois, sounds like you may have faulty safety switch, start by checking the seat switch first. Check the attached links,instruction and guides, Good luck
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How to test lawn mower electrical safety switches
LAWN TRACTOR REPAIR how to test lawn mower saftey switches
How exactly do check the seat and brake safety switch on my tractor...
http://support.mtdproducts.com/app/answers/detail/a_id/327/~/safety-interlock-switch-locations---riding-mowers

Check Battery. If headlight equipped turn key to headlight on position and see if headlights are lit. No light dead battery dead tractor,

Charge battery. If after charging weak or no start forget the battery and get new, Life of battery is two to three years,

If battery good make sure that parking brake set and blades are not engaged. Safety lockout will prevent tractor from cranking. The tracker has a safety interlock on the seat that requires a body warm or cold sitting on the seat if the parking brake is not set. The seat switch is known to fail. Try bouncing on the seat?

OK if battery OK and seat is sat or park brake set we can assume the safety interlock circuit is disabling the start circuit.

Need model to provide more answers
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This website video shows how to check the component. Your model would be similar.
How to test lawn mower electrical safety switches

This electrical diagram is for a typical lawn tractor. Your model would be similar but different . This will give you an idea. The switch on the seat has two sets of contacts.

I don't your problem is the PTO switch but is either a bad operator seat switch or loose connection. The operator seat switch connector has a built-in shorting strip that engages when the connector is loose or unplugged.

I do not believe there is a manual available to the public for troubleshooting, however, you have at least 3 switches to tell the mower to stop when blades are engaged or clutch pedal released.

Seat switch
pedal switch
mower engage switch


The pedal and mower lever switches are identical, and have two sides, one for starting, one for blades turning. One side can fail. The pedal switch is on the frame very close to the pivot point of the pedal/shaft. The mower switch will be under the dash close to the bottom of the lever.

1) Locate and inspect the switches for broken or pinch wires, switch housing, or loose mounting, and how each lever or pedal engages the swtich.


2) This is a picture of the wiring so that you can get a better idea of location.

http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=917270824&productCategoryId=1509200&brandId=0247&modelName=TRACTOR&diagramPageId=00011&componentDescription=SCHEMATIC%20DIAGRAM-TRACTOR&documentId=P0811014&blt=06

http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=917270824&productCategoryId=1509200&brandId=0247&modelName=TRACTOR&diagramPageId=00001&componentDescription=ELECTRICAL&documentId=P0811014&blt=06

I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae

bad safety switch one under seat ,clutch pedal,blade engage leaver

I think one of the dafety switches is shut and is shorting out the circuit. There are usually 4 of them. one under the seat, one on the clutch pedal, one on the blade engagement lever and one on the gearshift which must be in neutral

Hi..my name is Keith..and the newer mowers have all kinds of safety switches..and the mowers will shut off..if you put the mower in reverse with the blades on..so i would suspect you have a bad reverse safety switch..i hope this will help..if not please write me back

Do you have a switch to engage the blades or a lever..... 1st thing check to see if the blade it's jammed on something under the deck

Grass and debris clogg the switch mechinisms, safety interlocks are sometimes a pain to diagnose but I would first look at the seat interlock, the petal switch and ffinally then the mowing deck.