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09-27-2011, 02:58 PM
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#1
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Senior Member
Join Date: Nov 2010
Posts: 117
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What is it?
Started up my generator the other day and found a puddle of gas on the floor. Lookd at the Genset and saw a leak from a little brass gadget about the size of a shotgun shell with a fuel line in the bottom and screwed onto an elbow at the carb.
Called up and ordered a new fuel filter....Wrong! The fuel filter is a cannister about as big around as a cambells soup can and half as high.
Onan Genset-1.jpg
Onan Marquis
Onan Genset-2.jpg
Its just behind the air filter
Onan Genset-3.jpg
Here is a closer view. Fuel "mists" out at the base of the hex head.
Anybody know what it is?
Bill
__________________
Life is a journey, not a destination.
2005 Georgetown 359ts
Bill & Virginia, Kentucky
Nights camped in 2010...5 , 2011...78,
Nights camped in 2012...57
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09-27-2011, 03:05 PM
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#2
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Senior Member
Join Date: Aug 2010
Location: Tomball
Posts: 688
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looks like a check valve to keep the fuel in the carb when not running.
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Dan, Kelly and Maddy.
Cupid and Kandi the Camp Dogs
Tomball, Texas
2006 Salem LE 29BHSS
2003 Ford Expedition Eddie Baur 5.4 w/ factory tow package 
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09-27-2011, 03:10 PM
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#3
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Moderator
Join Date: Nov 2008
Location: Winston-Salem, NC
Posts: 1,904
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Don't know, was going to guess fuel pressure regulator. Might have to go to the Onan site here Cummins Onan
Have some spec numbers off of your generator, and get a manual. Good Luck.
__________________
Windrider,
Too many toys, not enough time.
2001 F150 SuperCrew
2002 Jeep Wrangler
1978 Cessna 152
2000 Honda 750 Nighthawk
2008 Yamaha V-Star 650 Classic
2008 Work and Play 18LT 
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09-27-2011, 03:16 PM
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#4
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too fast turbo sled
Join Date: Aug 2011
Location: Lowden , Iowa
Posts: 3,381
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Looks to me like an additional fuel filter added on.
older 2 barrel fords used this on cars and trucks. By older I mean 70's and 80's
I bet it about 1/8 inch pipe thread.
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2005 silverado 2500hd pro ride 5th
2011 palomino sabre 32 bhok-6
2012 arctic cat f1100 turbo limited edition sno-pro
Ron and Amy Benhart
2012 nights camped (5)
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09-27-2011, 03:19 PM
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#5
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Senior Member
Join Date: Oct 2010
Posts: 203
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Back in the day alot of carbrated engines had those and they were fuel filters used as a secondary filter to the paper filter made of stintered bronze. You might be able to find them at a small engine repair shop.
__________________
2001 Ford F-350 DRW 7.3
2011 25 RL Wildcat
former fiver 1976 Fourwinds had for 35 years
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09-27-2011, 03:38 PM
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#6
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Member
Join Date: Aug 2010
Location: Miami, Florida
Posts: 412
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__________________
Frank & Rita M
2008 Ford FX2 F-150 3.73 CC 139" WB w/EQ4 WDS
2011 Rockwood 2702SS
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09-27-2011, 03:50 PM
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#7
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Senior Member
Join Date: Aug 2010
Location: Tomball
Posts: 688
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yes it does look like an old style fuel filter that srewed onto the carb and had either a paper filter or a porous stone element. Good work everyone!
__________________
Dan, Kelly and Maddy.
Cupid and Kandi the Camp Dogs
Tomball, Texas
2006 Salem LE 29BHSS
2003 Ford Expedition Eddie Baur 5.4 w/ factory tow package
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09-27-2011, 04:09 PM
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#8
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Senior Member
Join Date: Apr 2011
Location: Southwest Louisiana
Posts: 245
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Would not think it came from factory that way. Not with that hose clamp on it.
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2011 Solera
Work 28 and 28 around the world.
Camp every chance we get.
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09-27-2011, 05:22 PM
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#9
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Member
Join Date: Sep 2008
Posts: 61
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Someone replaced the filter,you can see the marks on the nut part.It came from the factory with a crimpted clamp on it,that you can get at a parts place.
__________________
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09-27-2011, 06:09 PM
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#10
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Senior Member
Join Date: Nov 2010
Posts: 117
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WOW!
You guys nailed it, especially FRANKM. The item was probably replaced sometime since 2005 hence the screw type hose clamp. The marks on the brass are mine as I removed the item to examine it for cracks after I tried to tighten it.
Thanks a bunch. 
Bill
__________________
Life is a journey, not a destination.
2005 Georgetown 359ts
Bill & Virginia, Kentucky
Nights camped in 2010...5 , 2011...78,
Nights camped in 2012...57
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