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Old 07-08-2012, 12:34 PM   #1
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Wink Onan 6500 fuse

I rencently had the generator worked on. Tried to "exercise" the unit yesterday and found electrical tape holding in the two fuses on the face of the genset circuit board area. Unit would start and run as long as I held in the "start" button, quits as soon as it's released. Obviously I need the proper cap for the fuse unit.....but my question is: do these fuses provide 12 v. to the circuit board and would their malfunction lead to the symptoms I described? Thanks for any help.
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Old 07-08-2012, 08:22 PM   #2
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Holding the Start switch down makes the generator bypass a couple diagnostic checks that would cause a shutdown, i.e. low oil pressure and no 120vac. It also sends 12v to the fuel pump so there is fuel for starting. Once the button is released these checks become active.

Is this a Marquis series generator, i.e. the Marquis 6500? You can find the service manual for it here:
Download: Onan marquis 6500 service manual at Marks Web of Books and Manuals
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Old 07-22-2012, 06:59 PM   #3
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Finally took the unit to Camping World. The problem was a fried voltage regulator. Install and ran great.
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Old 07-31-2012, 10:36 AM   #4
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fuses

i had the same thing happen to my onan generator,any idea what these fuses are fore.
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Old 08-01-2012, 05:41 PM   #5
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Extra fuses

The two fuses in the holder on the front of the genset are simply spare fuses for the generator. You have to remove the cover of the genset to replace them.
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