Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

Onan Fuel Problem


  • Please log in to reply
20 replies to this topic

#1 bbuckler OFFLINE  

bbuckler
  • Senior Member
  • Member No: 59269
  • 2,087 Thanks
  • 1,890 posts
  • Location: Killeen,Tx

Posted August 05, 2016 - 08:14 PM

I started having a issue on my 16/6 twin. It will be running fine but after awhile it will get a air bubble in the line and stall out. 

I got new clamps on there and it has the tygon line going to the fuel pump. Any clues on what it can be ? 


  • chieffan said thank you

#2 Texas Deere and Horse OFFLINE  

Texas Deere and Horse

    RED Wild Hogs, Horses & Deeres

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 1435
  • 14,464 Thanks
  • 15,392 posts
  • Location: East of San Antonio Texas

Posted August 05, 2016 - 09:20 PM

Brandon, when you say it's getting air in the fuel line, before or after the fuel pump?



#3 bbuckler OFFLINE  

bbuckler
  • Senior Member
  • Member No: 59269
  • 2,087 Thanks
  • 1,890 posts
  • Location: Killeen,Tx

Posted August 05, 2016 - 09:22 PM

Brandon, when you say it's getting air in the fuel line, before or after the fuel pump?

Before it go in right in the little piece of tygon line. 



#4 ducky OFFLINE  

ducky

    Senior Member

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 564
  • 1,630 Thanks
  • 3,869 posts
  • Location: Freedom, WI

Posted August 05, 2016 - 09:26 PM

Brandon, when you say it's getting air in the fuel line, before or after the fuel pump?

Good question.

Are we sucking air or boiling the fuel (vapor lock)?



#5 Texas Deere and Horse OFFLINE  

Texas Deere and Horse

    RED Wild Hogs, Horses & Deeres

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 1435
  • 14,464 Thanks
  • 15,392 posts
  • Location: East of San Antonio Texas

Posted August 05, 2016 - 09:30 PM

Check the barb sticking out of the bottom of your tank to make sure it's not cracked.


  • bbuckler said thank you

#6 bbuckler OFFLINE  

bbuckler
  • Senior Member
  • Member No: 59269
  • 2,087 Thanks
  • 1,890 posts
  • Location: Killeen,Tx

Posted August 05, 2016 - 09:31 PM

Good question.

Are we sucking air or boiling the fuel (vapor lock)?

I was wondering if it because the fuel line sit close to the muffler. 



#7 bbuckler OFFLINE  

bbuckler
  • Senior Member
  • Member No: 59269
  • 2,087 Thanks
  • 1,890 posts
  • Location: Killeen,Tx

Posted August 05, 2016 - 09:31 PM

Check the barb sticking out of the bottom of your tank to make sure it's not cracked.

Will do 



#8 Texas Deere and Horse OFFLINE  

Texas Deere and Horse

    RED Wild Hogs, Horses & Deeres

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 1435
  • 14,464 Thanks
  • 15,392 posts
  • Location: East of San Antonio Texas

Posted August 05, 2016 - 09:35 PM

I don't remember if your tank is mounted below the seat or under hood? If under seat, it could be a bad pickup in tank also. Had one on a JD318 do that.



#9 bbuckler OFFLINE  

bbuckler
  • Senior Member
  • Member No: 59269
  • 2,087 Thanks
  • 1,890 posts
  • Location: Killeen,Tx

Posted August 05, 2016 - 09:35 PM

I don't remember if your tank is mounted below the seat or under hood? If under seat, it could be a bad pickup in tank also. Had one on a JD318 do that.

It under the seat but it has the fitting on the bottom if I remember right. 


Edited by bbuckler, August 05, 2016 - 09:36 PM.


#10 Texas Deere and Horse OFFLINE  

Texas Deere and Horse

    RED Wild Hogs, Horses & Deeres

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 1435
  • 14,464 Thanks
  • 15,392 posts
  • Location: East of San Antonio Texas

Posted August 05, 2016 - 09:37 PM

Check to make sure the clamps are tight and the line doesn't have a nick in it also.



#11 bbuckler OFFLINE  

bbuckler
  • Senior Member
  • Member No: 59269
  • 2,087 Thanks
  • 1,890 posts
  • Location: Killeen,Tx

Posted August 05, 2016 - 09:42 PM

Check to make sure the clamps are tight and the line doesn't have a nick in it also.

I got to re run the fuel line anyways my dad knocked it loose with his foot and that about the time it start acting up but I added the hose clamps to it all 


  • Texas Deere and Horse said thank you

#12 secondtry OFFLINE  

secondtry
  • Senior Member
  • Member No: 83632
  • 346 Thanks
  • 323 posts
  • Location: Washington State

Posted August 05, 2016 - 09:51 PM

Checking this out may help, I believe they are very similar.

Fuel Tank Problems on Sears GT18-6

in Sears, Craftsman Tractor Forum
Started by Utah Smitty, Jun 25, 2016  icon_tag.pngsears, gt18, gt18-6, fuel tank


  • bbuckler said thank you

#13 bbuckler OFFLINE  

bbuckler
  • Senior Member
  • Member No: 59269
  • 2,087 Thanks
  • 1,890 posts
  • Location: Killeen,Tx

Posted August 05, 2016 - 10:08 PM

How much fuel line is needed ? I think I will replace the old line too. 



#14 Texas Deere and Horse OFFLINE  

Texas Deere and Horse

    RED Wild Hogs, Horses & Deeres

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 1435
  • 14,464 Thanks
  • 15,392 posts
  • Location: East of San Antonio Texas

Posted August 05, 2016 - 10:11 PM

Just get 10' or 12' and you'll have extra. :thumbs:


  • bbuckler said thank you

#15 Lmiller3358 ONLINE  

Lmiller3358

    Member

  • Senior Member
  • Member No: 5109
  • 1,334 Thanks
  • 1,322 posts
  • Location: Massachusetts

Posted August 06, 2016 - 05:58 AM

My brother had the same problem with his Onan, there was crud plugging the outlet from the tank !


  • Alc, KC9KAS and bbuckler have said thanks




Top