Scotts Riding Mower Electrical Issue

[rlhall3071]

Hey Y'all.
Just joined with Scott RM electrical question. Not able to engage blade clutch; no power to clutch; died in a heart beat while running. Mower runs ok otherwise. The electrical schematic shows 2 fuses. One off battery 25a (easy to find) and another for electrical clutch ckt. I can not find the clutch fuse. Where is it usually hidden? Any suggestions would be appreciated. It's a good day to mow grass in Siler City, NC, sort of cloudy. Have a good day; mine's so-so thus far.
Robert
rlhall3071

 

[shiftsuper175607]

Hey Y'all.
Just joined with Scott RM electrical question. Not able to engage blade clutch; no power to clutch; died in a heart beat while running. Mower runs ok otherwise. The electrical schematic shows 2 fuses. One off battery 25a (easy to find) and another for electrical clutch ckt. I can not find the clutch fuse. Where is it usually hidden? Any suggestions would be appreciated. It's a good day to mow grass in Siler City, NC, sort of cloudy. Have a good day; mine's so-so thus far.
Robert
rlhall3071

why do you say there is no power to the clutch? Did you check the voltage near the clutch?
When you turn the key to run, you should hear the clutch click and engage.


Did the mower die when you tried to engage the clutch?
if so, then that could be a safety switch issue.

Does the mower die when you lift off of the seat?
Will the mower run when you leave the seat with the brake not on?

 

[rlhall3071]

why do you say there is no power to the clutch? Did you check the voltage near the clutch?
When you turn the key to run, you should hear the clutch click and engage.


Did the mower die when you tried to engage the clutch?
if so, then that could be a safety switch issue.

Does the mower die when you lift off of the seat?
Will the mower run when you leave the seat with the brake not on?

Thanks for reply.
As for Seat Switch, I defeated that a long time ago, so I don't have that issue. The mower runs fine right now; starts OK, runs OK. Just no clutch engagment.

The blade stopped turning while I was mowing. Now the clutch does not make the usual "clank" noise when power is applied to the clutch.
I have hung a meter on the clutch connector and there are no volts at the connector with engine running and me in the seat, and the PTO switch engaged.

I have a very poor copy of the electrical schematic, but I can see 2 fuses; 1 for the whole mower--25a-- and another in the line that goes to the connector servicing the clutch. I sure can't find it! Maybe they saved a few bucks and did not put one in this model. It's actually a murray in Scott's colors. If it isn't a fuse, it might be the PTO switch; that's the nxt point of failure. I hope I answered your questions. Thanks again. Robert/rlhall3071

 

[reynoldston]

Thanks for reply.
As for Seat Switch, I defeated that a long time ago, so I don't have that issue. The mower runs fine right now; starts OK, runs OK. Just no clutch engagment.

The blade stopped turning while I was mowing. Now the clutch does not make the usual "clank" noise when power is applied to the clutch.
I have hung a meter on the clutch connector and there are no volts at the connector with engine running and me in the seat, and the PTO switch engaged.

I have a very poor copy of the electrical schematic, but I can see 2 fuses; 1 for the whole mower--25a-- and another in the line that goes to the connector servicing the clutch. I sure can't find it! Maybe they saved a few bucks and did not put one in this model. It's actually a murray in Scott's colors. If it isn't a fuse, it might be the PTO switch; that's the nxt point of failure. I hope I answered your questions. Thanks again. Robert/rlhall3071

Seeing you have the electric schematic you have haft the job done. Just use that schematic like a map and fallow the wires back from the clutch with a test light till you find the problem. Not that bad of a job to do. You will have to be the person to find that point of failure.

 

[rlhall3071]

Seeing you have the electric schematic you have haft the job done. Just use that schematic like a map and fallow the wires back from the clutch with a test light till you find the problem. Not that bad of a job to do. You will have to be the person to find that point of failure.

Thanks for the reply. Some good news! I found the other fuse. It was hidden in the wire harness bundle hanging down behind the gas tank; almost impossible to see. This 3a fuse cks good and I can find 12vdc across the fuse socket. I, however, still have no power at the clutch connector. Right now I am suspicious of the fuse. Old mower; old fuse. So I wll replce it, and if that doesn't help, I'll go to the back of the PTO switch. Stay tuned.
Thanks nagain.
Robert
rlhall3071

 

[shiftsuper175607]

Thanks for the reply. Some good news! I found the other fuse. It was hidden in the wire harness bundle hanging down behind the gas tank; almost impossible to see. This 3a fuse cks good and I can find 12vdc across the fuse socket. I, however, still have no power at the clutch connector. Right now I am suspicious of the fuse. Old mower; old fuse. So I wll replce it, and if that doesn't help, I'll go to the back of the PTO switch. Stay tuned.
Thanks nagain.
Robert
rlhall3071

if you have 12 V DC across the fuse then you should have 12 V at the connector unless there is a break in the line. Unless the PTO switch is after that point.

My understanding is that clutches take more than 3 A to engage/maintain. Are you sure that is the correct line? Can you use your meter to test the voltage at the PTO switch? Find where 12 V comes to the switch and then when it is on comes out of the switch and follow the line.

 

[rlhall3071]

if you have 12 V DC across the fuse then you should have 12 V at the connector unless there is a break in the line. Unless the PTO switch is after that point.

My understanding is that clutches take more than 3 A to engage/maintain. Are you sure that is the correct line? Can you use your meter to test the voltage at the PTO switch? Find where 12 V comes to the switch and then when it is on comes out of the switch and follow the line.

Hi,
You are correct. The output of the fuse goes directly to the PTO switch. One of the PTO output pins goes directly to clutch connector.

Getting on those contacts under the dash to ck out if the 12 is getting thru the switch will be hard to do. I guess I will shotgun the PTO switch first. Thanks for the feedback. More of this saga later.
Robert
rlhall3071