RVAmerica.com Forums
 
RVAmerica ForumsRVAmerica ForumsBulletin BoardBulletin BoardGeneralGeneralOnan Marquis BGM 5000 CarburetorOnan Marquis BGM 5000 Carburetor
Previous Previous
 
Next Next
New Post
 7/30/2009 11:15 AM
 

My Onan Marquis BGM 5000 generator is not getting fuel through the carburetor. How do I remove the carb to clean it. I can see two mounting bolts to the intake manifold, but I don't see how to get at them to remove carb. Do I need to remove intake manifold with cab on it and then remove the carb?

Howard

New Post
 7/30/2009 12:44 PM
 

Howard,

  I take it you have taken the line off and cranked the gen to be sure you are getting gas to the carb. I can't tell you much from there on as I don't know just what the problem is as far as what's in the way of the removal etc. I know that there are times when I have heard that the genset has to be removed from the RV before it can be worked on. That's what happen when they cram something in a small space. Like changing plugs and oil filters on todays cars with the motor sitting in there side ways. NO FUN

                                                 Good Luck,

                                                  RVGARY


Home is where you park it God Bless America
New Post
 7/30/2009 12:57 PM
 

Howard - Before tackling the carburetor, have you checked the genset's fuel filter and electric fuel pump?  Also, I'm assuming you're aware that the gas tank must be more than 1/4 full for the genset fuel pickup tube to get gas.  Good luck. - Dave

New Post
 7/30/2009 1:31 PM
 

RVGary & Dave,

Thanks for the response.

Yes, I am getting fuel to the carburetor. Fuel pump is pumping, filter is clear, and I have spark. She just won't fire... It last ran about 6 weeks ago...Was slow to start, sputtered a little and then ran OK. I shut it down and restarted it OK... Now, 6 weeks later, It just won't start. The fuel is a little old and I think that we need to de-gunk the carb. I pulled a plug and it was bone dry. Gave it a shot of sea foam, replaced the plug and the generator fired, but would not stay running.

Howard

New Post
 7/30/2009 3:54 PM
 

Sounds like you are on the right track Howard. I guess it is just a case of getting the carb off.  Like I said unless someone on here has "been there and done that", it will be pretty hard for anyone to give you much help as even if they have the same Gen-Set how it is installed in the compartment etc. can make a lot of deferents in how and what you can get to. It may be just a case of the old deal" One bolt at a time till it falls off". Reading your post it sound like you have had grease under your finger nails so I'm sure you can work it out. Keep us posted we are always interested on how things turn out.

                                  RVGARY

 


Home is where you park it God Bless America
New Post
 7/31/2009 1:55 PM
 

Howard, is there a sensor on the bottom of the bowl? if so I think if you take that off the bowl will come off. I think that is a fuel shut off sensor. maybe that is bad. if you do go for the whole carb be carefull nut to bend the rods. I think you have to take a lot of things off to get the carb off without bending the linkage. I found a web site a couple of years ago for Onan that had a place to ask questions. the tech told me you could not clean the carb on mine. I took it apart it looked clean, but I washed it with shellac thinner and carb cleaner. still would not run. took it to the shop and they put a new carb on and everything was fine. I have never understood why he said you could not clean the carb. at that time the gen had only 8 hours on it, but was 3 years old. let us know how you make out.


mike
Previous Previous
 
Next Next
RVAmerica ForumsRVAmerica ForumsBulletin BoardBulletin BoardGeneralGeneralOnan Marquis BGM 5000 CarburetorOnan Marquis BGM 5000 Carburetor

Horizon Block
Progressive Insurance