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Author Topic: Onan Marquis 7000 Generator Problems  (Read 5514 times)
Fred Mc
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« on: February 02, 2008, 08:38:48 PM »

I just bought an Onan Marquis 7000 generator. Apparently the motor works fine but it is not putting out any AC.

It was hooked up to a remote which is missing so I need a manual that has electric schematics so I can start the thing and try and figure out what the problem is.

Anyone know where there are free manuals for download? Any other help would be appreciated.


Fred Mc.
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73' MC-8 8V71/HT740 Southwest Florida

« Reply #1 on: February 03, 2008, 05:26:20 AM »

I downloaded manuals for an older Onan several years ago by googling ONAN MANUAL.  When I sold that generator, the manual went with it and do not remember where I got the manual.  Jack

Growing Older Is Mandatory, Growing Up Is Optional
Arcadia, Florida, When we are home

« Reply #2 on: February 03, 2008, 05:29:41 AM »

I have seen Onan manuals on eBay at times.


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« Reply #3 on: February 03, 2008, 06:08:14 AM »

From the Board Help board under Favorites, reply 4, http://www.busconversions.com/bbs/index.php?topic=3071.0:








« Last Edit: February 03, 2008, 07:08:46 AM by DrivingMissLazy » Logged

Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body. But rather to skid in sideways, chocolate in one hand, a good Reisling in the other, body thoroughly used up, totally worn out and screaming:  WOO HOO, what a ride
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"Foolish Pleasure" 35' MC5A

« Reply #4 on: February 03, 2008, 07:27:31 AM »

Fred, first check to make sure the output circuit breaker is closed. Most of these failures are due to a bad voltage regulator. Onan wants way too much for them so I recommend Flightsystems.com for a quality replacement.  I helped them design and prototype their Onan replacement regulators so I know from whence I speak.

Good Luck.


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« Reply #5 on: February 03, 2008, 06:08:20 PM »

This may not be the fix for your problem, but I had a no output condition with my 7000 this past summer.  It was intermittent, and what I found was a wire had backed out of the multi-pin connector in the circuit breaker box.  I spread the retaining clip on the barrel connector for that wire, pushed it back into the main connector, and have not had a problem since.  Hope your problem is as simple!

74 MCI 8
LaGrange, NC
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