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12-29-2014, 07:01 PM
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#1
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Member
Join Date: Oct 2013
Location: Bend, Oregon
Posts: 72
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Question about changing fuel filter on Onan BGE series gen set
Hello
I have an 96 Onan Emerald 4000 BGE series Gen Set and I am going to replace the fuel filter and have a question.
Is the fuel system under pressure? Can I simply disconnect the fuel line and remove the filer or do I need to depressurize it?
Thank in advance!
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12-29-2014, 08:08 PM
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#2
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Senior Member
Join Date: Nov 2014
Posts: 225
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I'd have some rags to catch the fuel but no the fuel line isn't pressurized the way it would be of it were fuel injected.
__________________
1992 Foretravel Grand Villa 3600
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12-30-2014, 10:50 AM
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#3
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Member
Join Date: Oct 2013
Location: Bend, Oregon
Posts: 72
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Thank you Oldtoolmaker. I figured as much but wasn't sure if the Gen fuel line was tapped off the main fuel line for the engine which is pressurized.
Happy Holidays!
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12-30-2014, 01:26 PM
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#4
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Senior Member
Join Date: Nov 2014
Posts: 225
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Thank you very much. But, if you think about it that line can't be pressurized. Onan is clear that you should only use Onan fuel pumps because aftermarket pumps may over pressure the fuel system.
I have the '97 Emerald+ in my '86 Rockwood and the Onan runs about 20 hours each week.
__________________
1992 Foretravel Grand Villa 3600
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12-30-2014, 02:25 PM
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#5
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Member
Join Date: Mar 2009
Posts: 37
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I would suggest that you add a small gas shut off valve ahead of the filter. Available at Tractor Supply or hardware store of your choice. Allows you to shut the gas supply off when you put it in storage and burn the remaining fuel in the bowl to minimize varnishing of the needle valve.
Pete
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12-30-2014, 06:04 PM
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#6
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Member
Join Date: Oct 2013
Location: Bend, Oregon
Posts: 72
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[QUOTE=purduepete2;2362956]I would suggest that you add a small gas shut off valve ahead of the filter. Available at Tractor Supply or hardware store of your choice. Allows you to shut the gas supply off when you put it in storage and burn the remaining fuel in the bowl to minimize varnishing of the needle valve.
[/QUOTE
Well this is an interesting idea. I do run the gennie monthly and I am under the impression this is often enough to prevent varnish of the carb.
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01-01-2015, 01:05 PM
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#7
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Member
Forest River Owners Club
Join Date: Sep 2012
Location: BELEN, NM
Posts: 45
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it is not under pressure.
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01-02-2015, 02:49 PM
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#8
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Member
Join Date: Mar 2009
Posts: 37
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[QUOTE=Rockyroad;2363193]
Quote:
Originally Posted by purduepete2
I would suggest that you add a small gas shut off valve ahead of the filter. Available at Tractor Supply or hardware store of your choice. Allows you to shut the gas supply off when you put it in storage and burn the remaining fuel in the bowl to minimize varnishing of the needle valve.
[/QUOTE
Well this is an interesting idea. I do run the gennie monthly and I am under the impression this is often enough to prevent varnish of the carb.
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That's the point, If you add the valve; you won't have to run the generator for 30 minutes every month.
Pete
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02-18-2015, 07:45 PM
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#9
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Senior Member
Join Date: Jun 2013
Location: Calabash, NC
Posts: 143
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I have a 4kw 2003 Onan. It is hard to start, takes lots of cranking but does finally start. Suggestions as to why? I prime it, at least I hear it clicking.
thanks
dan
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02-19-2015, 01:52 PM
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#10
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Member
Join Date: Oct 2013
Location: Bend, Oregon
Posts: 72
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Quote:
Originally Posted by Dan_Johnston
I have a 4kw 2003 Onan. It is hard to start, takes lots of cranking but does finally start. Suggestions as to why? I prime it, at least I hear it clicking.
thanks
dan
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Dan; Is it always hard to start or only after its been sitting for a while. For example, once you get it running if you let it sit for a day or two will it start right up or does the problem only show up after the gennie sits for a long while?
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02-20-2015, 04:59 AM
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#11
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Senior Member
Join Date: Jun 2013
Location: Calabash, NC
Posts: 143
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ok. that makes sense. Yes if started once, it does start sooner on subsequent starts. Just not used to a motor being so picky about starting.  Thanks for the come back. dan
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02-21-2015, 11:31 AM
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#12
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Member
Join Date: Oct 2013
Location: Bend, Oregon
Posts: 72
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Quote:
Originally Posted by Dan_Johnston
ok. that makes sense. Yes if started once, it does start sooner on subsequent starts. Just not used to a motor being so picky about starting. Thanks for the come back. dan |
Dan. I run mine monthly and it does take a couple extra seconds to start the 1st time. But, if I start it a couple days later it fires right up.
I am no mechanic but my guess is whats happening is the fuel in the carb has started to evaporate and it takes a bit more umph to get back in there.
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