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  #1  
Old 11-12-2017, 11:58 PM
Gregory Gregory is offline
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Default 1811 blowing fuses

My 1811 keeps blowing fuses. After putting a new one in, tractor runs for about 5 minutes and then the engine dies.
Not sure what to check for. Grounds are good, battery is good.
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Old 11-13-2017, 12:29 AM
R Bedell R Bedell is offline
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Does the fuse blowing have anything to do with the PTO engaged...???
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Old 11-13-2017, 07:17 AM
Gregory Gregory is offline
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No R Bedell. It's independent of the PTO being engaged or the lights on or anything that would cause a electrical load on the system.
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Old 11-13-2017, 07:26 AM
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The 1811 has a magneto so it's doesn't require any power to stay running, not sure how a fuse blowing could kill the engine.
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Old 11-13-2017, 07:46 AM
R Bedell R Bedell is offline
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Without any load (ie: PTO or Lights), it sounds like a hot wire is grounding out to some source.

This is a situation where a meter (VOM or DVM) is required and start examining wires and measuring resistance until the culprit is uncovered.
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Old 11-13-2017, 08:08 AM
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ironman ironman is offline
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Wiring diagrams here, page 2-55 or 2-59 depending on your tractor's s/n.

http://www.onlycubcadets.net/pdf/772-3899.pdf

Like Olds said, you don't need the fuse to keep running. You might try starting it and then removing the fuse to see if the fuse blowing is killing the engine or it is something else entirely and the fuse is a coincidence.
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Old 11-13-2017, 09:17 AM
Gregory Gregory is offline
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Thankyou ironman, excellent trouble-shooting technique. I'm going to finish putting the tractor back together today. Had transmission relief valves rebuilt and removed seat pan to make easier access. Painted pan while it was off needs to be re-assembled.
I'll keep you posted as to progress.
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Old 11-13-2017, 09:29 AM
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Quote:
Originally Posted by olds45512 View Post
The 1811 has a magneto so it's doesn't require any power to stay running, not sure how a fuse blowing could kill the engine.
I think it has a fuel sol on the carb if it is a mag 18.
no power there would kill the engine.
prolly a short to ground someplace
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Old 11-13-2017, 10:20 AM
J-Mech J-Mech is offline
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Quote:
Originally Posted by ol'George View Post
I think it has a fuel sol on the carb if it is a mag 18.
no power there would kill the engine.
prolly a short to ground someplace
1811 doesn't have a fuel solenoid, unless the engine has been replaced with one that does. If that is the case, extra wiring has been added outside of the OEM harness and may be causing an issue.
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Old 11-13-2017, 04:04 PM
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If I had that problem, I would take my old headlight bulb with clip leads attached and clip it on the fuse holder. When the short happens the bulb lights up. If trouble shooting a 120 volt circuit, I use a 100w bulb. Sure saves blowing fuses.
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