Dead Mower

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Tim6559

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Hey guys. 2015 hustler raptor 60", Kohler engine. While mulching leaves today, she just died suddenly. She won't even turn over. Gas and battery are fine. I bypassed the seat switch (just jumped the wires together) and that did nothing. What else could it be???
 

StarTech

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Look for the 15 amp main fuse and check it. If it is blown and you was using the elecric clutch then it is possible that the electric clutch is partially shorted or have bad place touching ground at random
 

Tim6559

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Look for the 15 amp main fuse and check it. If it is blown and you was using the elecric clutch then it is possible that the electric clutch is partially shorted or have bad place touching ground at random
If you're talking about the fuse just off of the starter solenoid, checked it. It's good
 

Rivets

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Time for electrical troubleshooting. Here is the procedure I use, but others do it in other ways.
Electrical problems can be very easy or very difficult, depending on four things.

1. How well you understand basic electricity.
2. What tools you have and know how to use.
3. How well you follow directions.
4. You don't overlook or assume anything and verify everything.

Remember we cannot see what you are doing. You are our eyes, ears and fingers in solving this problem. You must be as accurate as you can when you report back. The two basic tools we will ask you to use are a test light and a multi-meter. If you have an assistant when going through these tests it would be very helpful. These steps work the best when done in order, so please don't jump around. Now let's solve this problem.

First, check the fuse(s), check battery connections for corrosion (clean if necessary) and voltage - above 12.5 volts should be good. Check and make sure the chassis ground is clean and tight.
Second, check for power from the battery to one of the large terminals on the solenoid. One of the wires is connected directly to the battery and has power all the time so one of the large terminals should light a test light or show 12 volts on a meter at all times.
Third, check for power at the small terminal of the solenoid while depressing the clutch/brake pedal and holding the key in the start position (you may need an assistant to sit in the seat to override the safety switch). If your solenoid is a four wire solenoid, check both small wire terminals as one is ground and the other is power from the ignition switch. If your solenoid is a three wire solenoid, make sure the solenoid body is not corroded where it bolts to the chassis of the mower as this is your ground path back to the battery. If in doubt, remove the solenoid and clean the mounting area down to bare metal. If there is no power to the small terminal then your problem is most likely a safety switch, ignition switch or in the wiring.
Fourth, check for power on the other large terminal of the solenoid while holding the key in the start position (you may need an assistant to sit in the seat to override the safety switch).
Fifth, check for power at the starter while holding the key in the start position (assistant again).
Sixth, check your ground circuit back to the battery.

After you have gone through each of the above steps, let us know what happened when you did each step. At that point we will have great info to tell you how to proceed. Remember you are our eyes, ears, and fingers, so please be as accurate as possible.

Be as specific as possible with voltage readings as this will help diagnose your problem quicker. If you do not know how to perform the above checks, just ask and I will try to guide you through it. Youtube also has some videos and as you know a picture is worth a thousand words.
 

Tim6559

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Time for electrical troubleshooting. Here is the procedure I use, but others do it in other ways.
Electrical problems can be very easy or very difficult, depending on four things.

1. How well you understand basic electricity.
2. What tools you have and know how to use.
3. How well you follow directions.
4. You don't overlook or assume anything and verify everything.

Remember we cannot see what you are doing. You are our eyes, ears and fingers in solving this problem. You must be as accurate as you can when you report back. The two basic tools we will ask you to use are a test light and a multi-meter. If you have an assistant when going through these tests it would be very helpful. These steps work the best when done in order, so please don't jump around. Now let's solve this problem.

First, check the fuse(s), check battery connections for corrosion (clean if necessary) and voltage - above 12.5 volts should be good. Check and make sure the chassis ground is clean and tight.
Second, check for power from the battery to one of the large terminals on the solenoid. One of the wires is connected directly to the battery and has power all the time so one of the large terminals should light a test light or show 12 volts on a meter at all times.
Third, check for power at the small terminal of the solenoid while depressing the clutch/brake pedal and holding the key in the start position (you may need an assistant to sit in the seat to override the safety switch). If your solenoid is a four wire solenoid, check both small wire terminals as one is ground and the other is power from the ignition switch. If your solenoid is a three wire solenoid, make sure the solenoid body is not corroded where it bolts to the chassis of the mower as this is your ground path back to the battery. If in doubt, remove the solenoid and clean the mounting area down to bare metal. If there is no power to the small terminal then your problem is most likely a safety switch, ignition switch or in the wiring.
Fourth, check for power on the other large terminal of the solenoid while holding the key in the start position (you may need an assistant to sit in the seat to override the safety switch).
Fifth, check for power at the starter while holding the key in the start position (assistant again).
Sixth, check your ground circuit back to the battery.

After you have gone through each of the above steps, let us know what happened when you did each step. At that point we will have great info to tell you how to proceed. Remember you are our eyes, ears, and fingers, so please be as accurate as possible.

Be as specific as possible with voltage readings as this will help diagnose your problem quicker. If you do not know how to perform the above checks, just ask and I will try to guide you through it. Youtube also has some videos and as you know a picture is worth a thousand words.
I appreciate the write up. I'm a mechanical engineer so I'm quite savvy. Have an entire workshop of tools including multimeters. However, I don't think it's a solenoid or any sort of main power issue. A bad solenoid or fuse wouldn't cause it to suddenly due while mowing. That's why I'm leaning more towards one of the safety switches or some sort of relay. I bypassed the seat safety switch. I'm going to check the break switches next. So my question is, what else is there? There's alot going on in the PTO engage switch. Wondering if it could be in there?
 

Rivets

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I understand, but the first thing I taught my high school students when we started electrical troubleshooting is “NEVER ASSUME ANYTHING, TEST EVERYTHING IN ORDER”. I’m sure you’ve heard this more than once. As I said there are different ways to do things.
 

Tiger Small Engine

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Replaced both the PTO and Ignition switch. They were cheap on Amazon. Not sure which one it was, but that did the trick.

You replaced two parts without troubleshooting the actual issue. I am glad you got it resolved and repaired, however, replacing parts does not “make you savvy.” Just like I don’t work on electrical engineering issues everyday, you don’t go hands on with outdoor power equipment everyday. Nothing replaces real world experience.
 

Tim6559

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You replaced two parts without troubleshooting the actual issue. I am glad you got it resolved and repaired, however, replacing parts does not “make you savvy.” Just like I don’t work on electrical engineering issues everyday, you don’t go hands on with outdoor power equipment everyday. Nothing replaces real world experience.
It does make me savvy numb nuts....and smarter than you obviously. I already expressed it wasn't a battery, fuse, or solenoid issue. I also ruled out the seat switch. That only leaves ignition and/or PTO switch. There are 10 leads between those two switches. I could be a super duper smart guy like you and spend hours tracing every one of those leads, or spend $30 for both on Amazon with next day delivery and have them swapped out in 10 mins. Time is money smart guy....I think I won that battle
 
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