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Discussion Starter #1
My father-in-law gave me his 325 lawn tractor cause he couldn't get it to start. Well I was able to get the mower to start by jumping the fuel shut off directly to the battery, just to see if it would run. I checked for voltage on wire that connects to the fuel shut off while key is on and it has no voltage. Also while I had mower running for a min, the PTO clutch would not engage either. To turn the mower off, I had to disconnect the 12 volt lead I used to bypass the electrical system on the fuel shut off. Any ideas on the issue that's causing the no voltage to the fuel shut off?
 

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My father-in-law gave me his 325 lawn tractor cause he couldn't get it to start. Well I was able to get the mower to start by jumping the fuel shut off directly to the battery, just to see if it would run. I checked for voltage on wire that connects to the fuel shut off while key is on and it has no voltage. Also while I had mower running for a min, the PTO clutch would not engage either. To turn the mower off, I had to disconnect the 12 volt lead I used to bypass the electrical system on the fuel shut off. Any ideas on the issue that's causing the no voltage to the fuel shut off?
I would start with fuses,safety switches and any loose grounds.The pto wouldn't work unless you were sitting on the seat.
 

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I checked the two fuses on the key ignition module. I was seating in the seat when I tried the PTO. I traced the wire for the fuel shut off back to the module and checked for voltage on the module while key was on but no voltage. I haven't tried checking voltage going to the PTO yet. I believe the module is bad but instead of buying a new one, I'm going to replace the relay that's on the module and try that.
 

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Same issues for a GX325

I have a GX325 with very similar issues. No voltage to fuel cutoff, pto doesn't engage, seat safety switch not working and ignition key off position not working either. I start it by replacing the fuel cutoff with an 8MM screw and shut it off by removing the spark plug wires. I think there is a sequence of events here so if we solve the first one the rest will fall into line. I checked & cleaned my fuses and grounding harness with no change. Hoping for more ideas!
 

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I have a GX325 with very similar issues. No voltage to fuel cutoff, pto doesn't engage, seat safety switch not working and ignition key off position not working either. I start it by replacing the fuel cutoff with an 8MM screw and shut it off by removing the spark plug wires. I think there is a sequence of events here so if we solve the first one the rest will fall into line. I checked & cleaned my fuses and grounding harness with no change. Hoping for more ideas!
I believe I may have found the problem. Took advice to step back and look at one circuit at a time and found this on the back of the pcb:

pcb_closeup.jpg


Here is what it is supposed to look like, that broken circuit from above connects two blue arrows of which the one on the right is the fuel solenoid:
pcb_new.JPG

I will either solder a wire across the gap or connect the two blue arrows with an insulated wire. Wish me luck.
 

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That will probably get it going, but you will need to find out why it drew so much current to burn the trace off. Check find bad diodes/resistors on the board. Also check the fuel solenoid, especially the current draw.
 
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