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Onan Genset issue
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Turtle1
Posted 2018-10-04 3:10 PM (#5883)
Subject: Onan Genset issue


Contributor

25
Hi, trying to run down the cause of a problem. Unit starts but will not stop when told to. Have to pull the power cable to shut it down. If the gen does not start (like if no gas is present) it continues to crank until the power cable is disconnected. Same result with the start/stop button on the unit and the one in the cabin. I have the solenoid off at the moment, and have checked it out. seems to be doing what it is supposed to do. I'm thinking that leaves the control/circuit board. Those are kinda pricey, so I don't want to buy one unless it seems pretty likely to be the problem. Any thoughts?
btw, It's an Emerald 1 Genset. model 4BGEFA26100F. 4K watt unit. part number for the board is: 300-3056 rev f. I can get one through Amazon for a little over $130.
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hemi354az
Posted 2018-10-04 4:23 PM (#5884 - in reply to #5883)
Subject: Re: Onan Genset issue


Extreme Veteran

1001001002525
Location: Scottsdale, Aridzona
Have you looked thru this stuff yet ? - https://www.google.com/search?q=300-3056+rev+f.+circuit&...
Lots of discussion and trouble shooting.
The FMC 2900R Came with an Onan, 6.5 kw, RVD 5100067 before Onan even made the Emerald Gensets, so obviously the one in you FMC was replaced by some PO.
Gen ON ! Lou #120
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Turtle1
Posted 2018-10-04 4:37 PM (#5885 - in reply to #5883)
Subject: Re: Onan Genset issue


Contributor

25
Yes, I have looked through that stuff. My FMC is a transit bus conversion. Lot's of differences! Was hoping someone had the same problem and could say with some degree of confidence, what to replace. Probably the board, but I'll wait a bit (and keep poking around the inter-web) to see if someone here has some insight.
Thanks!
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B. Sitton
Posted 2018-10-04 6:05 PM (#5886 - in reply to #5885)
Subject: Re: Onan Genset issue


Extreme Veteran

10010010025
Location: Ignacio Colorado
When you figure it out let us know what it was please. I have a transit with an emerald 4KW.
Bill
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LCAC_Man
Posted 2018-10-04 6:48 PM (#5887 - in reply to #5886)
Subject: Re: Onan Genset issue


Elite Veteran

500100
Location: Oceanside, CA
I'd register on this forum and see what you can find:
https://www.smokstak.com/forum/forumdisplay.php?f=1
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dkarnath
Posted 2018-10-04 7:29 PM (#5888 - in reply to #5887)
Subject: Re: Onan Genset issue



Extreme Veteran

1001001001002525
Location: Medford, OR
You probably have a bad (sticking) relay
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5Dollar
Posted 2018-10-04 8:57 PM (#5889 - in reply to #5883)
Subject: Re: Onan Genset issue


Veteran

100
Location: Bethune, SC
The original generator had no circuit boards. Governors (3 adjustment points) have control over the output. I sell these cck 6.0 generators to preppers for $1,500 to $2,000. I buy them not running for out of old motorhomes for $2-300, completely service them with any needed new/used parts, tune them up, go to my list of waiting buyers and they are sold in 24 hrs. If you are on the east coast, and need a 6.5 Onan NH or Emerald III generator that will run two ac's and a small microwave, I will have some ready after the first of the year - $1,200 to $1,500. Henry
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