Rider quits. No electrical power . . . at all.

ecknerwal

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27HP Craftsman 54" Deck 700+ Hours. -- Mowing for about 30 minutes when engine quit. No power! No lights. No LCD hour meter. No Amp meter jump. PTO is off. Checked Operator Present switch and wires. 30 amp fuse OK. Battery Pos & Neg wires tight on both ends. Recently replaced PTO (yes, correct model). What else should I check?
 

KennyV

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Is there any power at the battery...
They can fail suddenly as an Open... what voltage do you have on the battery and also at the key switch? :smile:KennyV
 

cubby

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I agree with Kenny batteries can go bad just like that, and and with most electrical problems you start
with checking the battery first. Also check the negative battery cable where it connects to the chassis
to make sure it has a tight connection. This problem where there is no power to anything is usually
easier to find than most electrical problems. Get a voltmeter or test light and start checking...cubby
 

ecknerwal

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OK, here goes . . . I jumped the battery, nothing. So I recheck the fuse. There's so much dirt jammed up into it I can't tell really for sure it's OK. Cleaned it out - yep, it's blown. Replace with a new 30A fuse. Starts right up!! Great! Hit the PTO switch and BAM! blown fuse. I'm gonna check for a place that grounds out a power wire. Since this originally blew during operation (the PTO was already running) and now it blows when turned on. I'm guessing some wire wore down and touched ground while in operation, now I gotta find it. Any other ideas?
 

ecknerwal

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Found PTO wire had rubbed on pulley. Repaired wire. Now engine runs but when I pull the PTO switch the engine quits. The PTO engages and the blades begin to spin but the engine quits. Quickly switch off the PTO and the engine catches and continues to run. What the heck now??
 
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KennyV

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The PTO switch is actually two switches in one... It's possible that the short has damaged the PTO switch... check with an ohm meter and see if the other side of the switch is bad... :smile:KennyV
 

ecknerwal

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I don't understand, what do you mean by "the other side of the switch"? The are are 3 rows of pins I believe. I'd have to go check . . . it's after midnight now so tomorrow will suffice, yes?.
 

reddragon

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ive had the fuse connector break inside.....check for power to your ignition switch
 

ecknerwal

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There must be power, it starts, runs and the headlight comes on. It's just that the engine quits when the PTO switch is on. Am I mistaken? What am I missing?
 

reddragon

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the PTO has a safety switch that grounds the magneto.....either the switch is dead/cooked or the wiring
 
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