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Old 06-17-2015, 05:37 PM   #11
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Jim.

I have a 4k Onan in a 2014 Sunseeker. I primed it every time I started it, until the red light came on. It was very hard to start and surged for 15 seconds or so. I went and re-read the manual, and it said only to prime if it ran out of fuel. I also reset the elevation knob to my elevation at the same time. It starts very quick now, and does not surge. Fixed my issue, that is why I posted. Obviously the Onan manuals must be RV specific, as I have heard every prime combination possible on this thread.
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Old 06-17-2015, 06:26 PM   #12
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Priming like that makes more sense. While my dealer told me to prime until the lamp came on each time I started it, it made no sense to me that you would have to prime any carb unless it sat for weeks (or ran out of fuel).

I did check my elevation knob and it was at 0. However the first increment up from there (about 1/8 turn is labeled 3250 ft.) So I tried to set it for about 1K feet with 1/20th turn? Tried starting with the gen cold and warm. No difference. Takes about 3 or 4 restarts at 3 or 4 sec each before it will continue to run. (However I have no surging and great regulation when it does start. That is why I am not complaining to the dealer. After they work on it, it will probably start and that is all. )

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Originally Posted by CleteNKim View Post
Jim.

I have a 4k Onan in a 2014 Sunseeker. I primed it every time I started it, until the red light came on. It was very hard to start and surged for 15 seconds or so. I went and re-read the manual, and it said only to prime if it ran out of fuel. I also reset the elevation knob to my elevation at the same time. It starts very quick now, and does not surge. Fixed my issue, that is why I posted. Obviously the Onan manuals must be RV specific, as I have heard every prime combination possible on this thread.
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Old 06-19-2015, 03:04 AM   #13
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Manual?

[QUOTE=CleteNKim;896669]Jim.

I have a 4k Onan in a 2014 Sunseeker. I primed it every time I started it, until the red light came on. It was very hard to start and surged for 15 seconds or so. I went and re-read the manual, and it said only to prime if it ran out of fuel. I also reset the elevation knob to my elevation at the same time. It starts very quick now, and does not surge. Fixed my issue, that is why I posted. Obviously the Onan manuals must be RV specific, as I have heard every prime combination possible on this thread.[/QUOTE

OR you may be one of the few to read the book.

Yes fuel extender but surging the first few seconds sounds normal to me. When you have trouble is when it keeps surging. When that starts, first put an analog meter on your A/C and see how stable your voltage is. Then a KillAWatt meter is cheapest way to check hz. Should be 60 . If voltage or cycles per second are off oh say below 110v with no load or off more than a couple cycles, I wouldn't use it. Fix it and do not believe "the carburetor is not repairable". With some skill you can get the float bowl off and clean it and clear many obstructions that cause surging. Cycles per second can be that regulated running rpm is off. That can be adjusted too.
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