Model #917276703 CRAFTSMAN Lawn, Tractor

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Q:

Why does my craftsman YS4500 pto drive keep disingageing

A:

Knowing exactly what what to do with an item can be a bit confusing. If you would like to you can go onto the Sears Home Services website and schedule for a technician to go to your home. I have attached the link below. Hope this helps!

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Alina F. -
September 26, 2010
A:

Check starting at the PTO clutch harness to make sure it’s plugged in securely to the tractor harness. From there, check the back of the PTO switch to make sure the plug is secure to the switch.

It’s possible for a faulty charging system to cause this. As the battery weakens for use it will get to a point of low enough voltage to not run the PTO clutch. Normally, if that happens the battery would then be low enough not to start the tractor though. But if it’s running when it happens, the engine would continue to run for quite some time as the fuel shutoff solenoid only needs minimal power to function.

If all those things look good the problem could be the PTO switch or clutch. If you have a volt meter you can set it to read DC volts and attach it to the power leads coming from the switch down to the clutch. Then run the mower and wait for it to shut, when it does, notice to see if you still have power. If you don’t, it will be the switch; if you do, it will be the clutch.

If you do not have a meter (or test light), you can replace the switch and see if anything happens. A switch and a cheap meter are going to cost about the same amount. I don’t suspect the switch simply because most of the time they either work or they don’t. But it is possible that the switch is the cause, it’s just a remote chance.

Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
September 27, 2010
A:

Thanks Wade B I will try that when I get back next weekend, that would make sense because I did have to jump it for the initial start up so the low voltage could be a factor and that would explain the consistancy of when it goes down I will also further check all my connections. Thanks again!!!

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tcbolt -
September 27, 2010
A:

Yeah, if you had to jump it, there could very well be an issue with the charging system. Some engines will have a regulator and some wont. Most Kohler engines anymore will have a regulator on them. If that's what you have, it will have 2 white wires and one black on the reg. The white wires should carry 28-35VAC at full throttle. If it's not there, the alternator is bad. If it is there and you don't have the 12.5-13.5 VDC on the black wire, the reg is bad. If the engine is a briggs and stratton the wire colors will not be the same. If there is no regulator visible on a briggs, it doesnt have one. If that's the case, you just want to check on the 12vdc wire close to the alternator for voltage at full throttle, if not there the alternator is bad. You can check to see when you get time and get back with me here and we can proceed from there. If you do get back with me, get the model number from under the seat. Thanks.

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XX Wade_ -
Sears Technician
September 27, 2010
A:

The model number is 917.276703 craftsman ys4500 Lawn Tractor, Thanks again very helpful info you have given me I will be sure to check back in with you this week end to see my findings. WADE B KICKS GRASS!!!!!!

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tcbolt -
September 27, 2010
A:

Ok, you have the twin Briggs engine. It shows to have a regulator on it. It will be a little square-ish box on one side or the other. There will be a pair of wires going into that box from up under the flywheel. those wires can be black, yellow, or orange in most cases. On the regulator box, the 12VDC out is usually a red wire. This checks similar to the Kohler engine as far as voltages. The red wire should have 12.5-13.5VDC at full throttle and the 2 wires from the alternator should have 28-35VAC at full throttle. If there is any doubt about check it or wire colors, hit me back with the colors it has on it or a photo and we'll get it checked out. Let me know the outcome either way, or if you have other issues. We'll be happy to help you out. Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
September 27, 2010
A:

Will do thanks again Manage My Life and Wade B

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tcbolt -
September 27, 2010
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