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Onan Marquis 7000 won't start Scherie 8-4-07  
Started up on Wed afternoon for about 20 mins and then quit like it ran out of gas, but had 5\8 tank. Worked on lastnight and today still wont run. I have checked the oil,changed the plugs, cleaned the carb (runs with the cleaner)and did the 12v test. The fuel pump makes a winding sound but no fuel in the lines. is this the fuel pump, bad lines? Please help me
Thank You
Re: Onan Marquis 7000 won't start rich 8-9-08  
I am looking for a used 7k.
Re: Onan Marquis 7000 won't start Danny Goetz 9-29-08  
Accidently overfilled oil after changing oil, will not start, will act like trying but just shakes and coughs black smoke out exhaust. Was running fine before changed oil. Put in new plugs, still remains same. What else can I do?
Re: Onan Marquis 7000 won't start cliff 7-24-08  
You know anyone looking to by onan 7000 w/ very-very low hours
Onan marquis genset will only run on one cylinder if both plugs are connected it dies paul 9-26-14  
Bought a used coach heard the genset run but smelled like runing rich. turns out it was only running on one cylinder.if both are connected it will die out
Re: Onan Marquis 7000 won't start John K 8-6-07  
Try filling the tank and see if that helps. My gen won't run if the coach has less than 1/4 tank.
Re: Onan Marquis 7000 oil allane 7-8-09  
I have 10w 30 pennzoil oil can I use it in my onan marquis 7000
Re: Onan Marquis 7000 won't start Moho Marty 5-27-08  
The fact that the genny runs is good. My guess is the pull on the fuel like ^^ said.

Hey, anybody know anything about the light codes on the control module? Just wondering. Just started looking.
Re: Onan Marquis 7000 won't start William S. Mader 8-15-07  
Had problems with my GEn. Sprayed carb cleaner in the carb opening. THen re,oved the line from the fuel pump to the carb and using the extension nozzle on the crb cleaner sraped cleaner in the line two or three times. Conected back up the fuel line, filler a small oil cna with fresh gas. Sprayed some fule in the carb and started the generator. I then kept srpainy a little fuel in the carb from the oil can as the engine started to die. Ran the gen at a fast speed, got a black exhaust for awhile like running rich or like a diesel. After 3 to 5 minutes the generator started pulling fuel and running on its own. Bought some fuel system cleaner. Plan on using a small tank from a small engine (similar to tank on lawn mower) putting some fresh fuel and fuel system cleaner in it and attaching it to the fuel pump fro the generator, blocking off the line from the original tank. I'm going to run it this way for awhile as I think the inside of the carb maybe gummed up.

Re: Onan Marquis 7000 won't generate power Hugh 10-3-11  
I just purchased a used MH with a Onan 7000 Marquis Model #7NHMFA26105F. The generator will start but will not generate any electricity.Can you help?
Re: Onan Marquis 7000 won't start herb winkler 7-21-13  
Need troubleshooting manuel for model 7n hmf a 2615f 7.0 onan /marquist generator
won;t start
Re: Onan Marquis 7000 won't start Dave 9-30-13  
Had a friend try to fix unit havent seen him in a month need to know, the wiring for coil can you help
Re: Onan Marquis 7000 won't start per isberg 4-12-10  
This is an Onan 7000 year 1994.

300 hoers. Has always worked like clock work. On day with booth A/C on in run perfect a suddely just stopped.

When I tried to restart it it was staring for 2 seconds but was chaking like crazy, like it was running on one cylinder only. My mecanic said that the generator is not worth fixing because the coil wiering in the generating part that was bad.

Question: Why would a perfectly running generator engine stop running if the generator coil burns. What does the coil have to to with the actual engine funktion.

When I opened the electical control box where the stop/start switch is I can clealy see that cables are burnt almost like it has been on fire. Can that be caused by a bad coil in the rotating generating part itself.
Re: Onan Marquis 7000 won't start Darrell Barnes 11-28-10  
Scherie, Just went through the same problem with a Marquis 7000. It is the fuel pump. The rubber diaphragm has a pin hole and will not pick up the fuel. The fuel pump is around $160.00 with shipping.
Re: Onan Marquis 7000 won't start RICK 11-10-10  
I have a 1994 Pace Arrow with Onan 7000 Marquis Generator. I replaced the starter and forgot the wiring configuration... i.e. white, white, black, black, black/yellow to? red to?
Re: Onan Marquis 7000 won't start Gilbert 9-12-10  
Hello I got some problem with my marquiz gold 7000 trouble shooting
code 47 any one can help me.
Thanks a lot
Re: Onan Marquis 7000 won't start Rick 9-3-10  
What is the best oil to use in an Onan Marrquis 7000 RV Gen. I was told a straignt NAPA 30W would be good. Detergent or Non-Detergent? Would a synthetic oil like Mobile 1 be better?
Recently bought a 1997 Holiday Rambler so I'm new to RV'ing.
Re: Onan Marquis 7000 won't start Scherie 8-6-07  
Had 5\8 of a tank, but I did add more gas now we have over 3\4 of a tank and still not starting.
Re: Onan Marquis 7000 won't start wade 7-9-10  
I took off the fuel line and pressed the start button but no fuel would come out of the hose. should this happen or do I have another problem causing it not to start.
Re: Onan Marquis 7000 won't start Tim 8-10-08  
I have one on ebay.
Item number: 190243118514
Re: Onan Marquis 7000 won't start Doc Stuck 7-10-14  
)nan Marquis 7000 will not start. Does anyone have a wiring diagram?
Re: Onan Marquis 7000 won't start William 5-13-09  
Wont Start. Have power to the generator, but no power to the spark plug. Replaced the coil still nothing. What else can i try.
Re: Onan Marquis 7000 won't start Lance Windham 2-8-10  
Call plz ;a

Re: Onan Marquis 7000 won't start Robert mitcham 4-15-16  
I can start the gen. As long as I hold the starter in gauged but as soon as I let go it dies. What could this be.i have changed the mother board and still does the same.
Re: Onan Marquis 7000 won't start phong pham 4-25-11  
I have the onan marquis 7000, may i ask when the generator run I pull the fuse 10 amp out the genenrator stop, put the fuse back then start, it is not crank??? can you guy can help, or the control board no good?? thanks
Re: Onan Marquis 7000 won't start norman melvin 3-3-14  
Will not start.
Re: Onan Marquis 7000 won't generate power Enrique Mota 6-27-12  
I have exactly the same problem with the same generator,onan marquiz 7K working perfect but no power,how you resolve the problem? thank you so much!!
Re: Onan Marquis 7000 won't generate power Rick 3-16-15  
Gen worked fine all last year, cranked it last week and it will not click over to power up M.H. I replaced brushes last year
Re: Onan Marquis 7000 won't generate power Bob 6-28-15  
Unit not charging sometime it will charge shut it off next time might not charge replace brushes
Re: Onan Marquis 7000 won't generate power shannon 10-23-12  
Generator has no power coming out....
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