Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Welding

 
 
SFT Search:
Reply
 
Thread Tools Display Modes
  #1  
Old 02-11-2005, 04:48 PM
MAC702's Avatar
MAC702 MAC702 is offline
set phasers to .50 caliber
 
Join Date: Jun 2004
Location: Clark County, NV
Posts: 4,310
Default Darn Bobcat again

Many of you might remember my rantings about the Bobcat over the years. The only Miller product I cannot recommend. A lot of it has had to do with my dad's experiences with his Bobcat 225NT, about 2 years old now. Here's a problem that surfaced last summer and perhaps you guys have a remedy, other than putting a match down the tank after he runs it dry.

The fuel line overheats and vaporlocks the thing when it runs in the summer heat. Even putting a wet rag around it only prolongs the inevitable. It runs fine in cool weather.

I have had no problems with my TB301G, of course.

Do you think an auxiliary fan blowing air across the engine compartment might do the trick? Any other ideas?
__________________
"It's not important how many people I've killed. What's important is how I get along with the people who are still alive." - Jimmy the Tulip
Reply With Quote
  #2  
Old 02-11-2005, 05:17 PM
boilerman's Avatar
boilerman boilerman is offline
SFT Brewmaster
 
Join Date: Jun 2004
Location: Marshallville,Ohio
Posts: 3,382
Default

is rerouting the fuel line and option????? is the line steel or rubber????with EPA regs. they leaned out the small engine so they could come into emmision guide lines and it is making trouble for some
__________________
Director of Recruitment, Overseas (by appointment)

I don't suffer from insanity...I enjoy every minute of it
---------------------------------------------------
Reply With Quote
  #3  
Old 02-11-2005, 06:52 PM
7018's Avatar
7018 7018 is offline
Elite Member
 
Join Date: Jun 2004
Location: SnakeBite Al.
Posts: 2,992
Send a message via Yahoo to 7018
Default

The fuil line is rubber and it has a spring in it because it is shaped in a (u).The only trouible I've had was a whole in the line and it squirting on the plug.Lucky it didn't catch fire.Maybe your fuil line isn't passing enough gas through it.Thats all I can offer to help you.
__________________
This post brought to you by the bringer of chaos, doom, change, and technology... Asker of questions, challenger of assumptions, solver of problems and share-er of ideas
Reply With Quote
  #4  
Old 02-12-2005, 01:44 AM
DDA52's Avatar
DDA52 DDA52 is offline
Blood, Sweat & Concrete
 
Join Date: Jun 2004
Location: Bulverde, Tx.
Posts: 6,716
Send a message via MSN to DDA52
Default

Mac
Are you sure it is the fuel line? I have seen/heard of some of the fuel pumps that weren't acting right when they got hot. Symptom was just like a vapor lock. Just a thought.

I have the same pump in question on my new engine. I will be holding my breath a little when it gets over 90 in a month or so. If I have a prob, it'll show up then.

Do you still have the TB to unload??
__________________
Don



Grand High Poobah...(by appointment.)
Reply With Quote
  #5  
Old 02-12-2005, 02:01 AM
DDA52's Avatar
DDA52 DDA52 is offline
Blood, Sweat & Concrete
 
Join Date: Jun 2004
Location: Bulverde, Tx.
Posts: 6,716
Send a message via MSN to DDA52
Default

Mac
I forget...Kohler or Onan? The baddish pumps were Onan.
__________________
Don



Grand High Poobah...(by appointment.)
Reply With Quote
  #6  
Old 02-12-2005, 10:35 AM
moe1942's Avatar
moe1942 moe1942 is offline
Voice of Experience
 
Join Date: Jun 2004
Location: Alexandria, Louisiana
Posts: 11,266
Default

To isolate the problem use another tank and gravity feed fuel to the engine. Disconnect the existing fuel line at the carb, that way you eliminate the units entire fuel feed system.

If the unit runs fine on gravity feed then all you have to do is track down the offending component. Starting at the tank you should have a screen on the fuel pickup tube. Take low pressure air and back flush. Use a strong concentrated light and check the tank for debris. If the fuel hose is original I would replace making sure it is marked fuel hose. Also replace the fuel filter. If you still have the same problem replace the fuel pump.

If you do it in this order you go from the least expensive to the most.

Hope this helps. Good luck and let us know the rest of the story.

Last edited by madam X; 02-27-2011 at 09:23 PM. Reason: remove hacker link
Reply With Quote
  #7  
Old 02-15-2005, 09:29 PM
Shade Tree Welder's Avatar
Shade Tree Welder Shade Tree Welder is offline
Grumpy Bastard
 
Join Date: Jun 2004
Location: Kankakee County, IL
Posts: 23,034
Default

Quote:
Originally Posted by DDA52
Mac
Are you sure it is the fuel line? I have seen/heard of some of the fuel pumps that weren't acting right when they got hot. Symptom was just like a vapor lock. Just a thought.

I have the same pump in question on my new engine. I will be holding my breath a little when it gets over 90 in a month or so. If I have a prob, it'll show up then.

Do you still have the TB to unload??
I had the fuel pump go out on my mower, Kohler engine, the mower is 10 years old the diaphram just got old; but it acted just like vapor lock too. New pump was ~$40 and a breeze to replace zero problems since.
__________________
Shade

"Prepare to defend yourselves."
-- Sergeant Major Basil L. Plumley, Ia Drang Valley
Reply With Quote
  #8  
Old 02-16-2005, 05:46 PM
MAC702's Avatar
MAC702 MAC702 is offline
set phasers to .50 caliber
 
Join Date: Jun 2004
Location: Clark County, NV
Posts: 4,310
Default

Yeah, it's an Onan. Will let you know what Dad discovers.
__________________
"It's not important how many people I've killed. What's important is how I get along with the people who are still alive." - Jimmy the Tulip
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 09:13 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.