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XxRoosterXx · May 1, 2008, 11:59 AM

I have a Husqvarna mower and am having an issue with the 20amp fuse blowing. I noticed that it's only after I turn the pto on. Originally I thought it was the electric clutch. So I disconnected it, turned the key on without starting it and turned the pto on. It worked. I inspected the wiring and didn't see any insulation rubbed off anywhere. I reconnected it put some new blades on and tried it and it worked great. But then it happened again. I know it's possible that it's still shorted somewhere, possibly past the plug for the clutch. But is it still possible that the clutch is going bad? Do they just stop usually or do they slowly burn out? How do I troubleshoot the clutch to eliminate that possibility? I also looked at the pins in both sides of the plug and they looked fine. :confused:

Stratmando · May 1, 2008, 12:15 PM

You could put a continuity tester, light, buzzer or meter on the fuse holder(Not the hot side/the load side), the other to ground. Unplug PTO, and all other loads until it reads 0pen.
They do make DC Amprobes that will tell the amount of current drawn on a wire without disconnecting anything. You have to clamp around wire and it will tell which way current is flowing(charging or drawing).
Would be handy to do resistance on your clutch and replacement clutch to give an indication of shorted windings.

MOWERMAN2468 · May 3, 2008, 03:59 AM

Start is correct, keep tracing wires, and you are going to probably find a bare spot in the wire that makes ENough contact while the engine is running and everything is vibrating around and that is when it is making contact.
Electrical problems can be like needles in haystacks, you know it is there, you just have to keep looking until you either sit on it, or find it somehow else.

XxRoosterXx · May 17, 2008, 07:52 AM

Just an update on the trouble for anyone that is interested. I removed the clutch and was at the point where I was just going to replace it since I had looked at all the wiring I could see and had found nothing. I had already replaced the pto switch on the advice from a local repairman and still was blowing the fuse. Once I removed the clutch I seen that one of the wires was routed incorrectly and was rubbing on the spring. Very very small. Almost missed it. So Mowerman you called it on the bare wire. :cool: Thank you to you and Stratmando for the advice. I can finally mow my hay field now. LOL

MOWERMAN2468 · May 17, 2008, 07:28 PM

You could have a bare spot on the wires going to the electric clutch causing the short.