Jump to content

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



Photo
- - - - -

Why is it Vapour Locking?


  • Please log in to reply
19 replies to this topic

#16 propane1 ONLINE  

propane1
  • Senior Member
  • Member No: 54307
  • 6,110 Thanks
  • 3,202 posts
  • Location: Charlottetown, Prince Edward Island, Canada

Posted July 13, 2015 - 07:13 PM

That is very good information about vapour lock. Thanks, Noel
  • drbish and New.Canadian.DB.Owner have said thanks

#17 drbish OFFLINE  

drbish

    Collecter

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 2544
  • 1,162 Thanks
  • 1,162 posts
  • Location: Mooresville,NC

Posted July 13, 2015 - 08:50 PM

I do not kow if this pertains to your carb,found in Tecumseh Training and info.Carburetor Troubleshooting

teccarbpr.JPG  


  • MH81 and New.Canadian.DB.Owner have said thanks

#18 ol' stonebreaker ONLINE  

ol' stonebreaker
  • Senior Member
  • Member No: 12515
  • 1,313 Thanks
  • 982 posts
  • Location: idaho

Posted July 14, 2015 - 10:08 AM

MTD's definition is what I learned as kid growing up in Texas, and I saw plenty of it in the summers. Have you tried taking the fuel line loose from the carb to see if fuel flow resumes. If it does then I agree the carb has a venting problem.
Mike
  • MH81 and propane1 have said thanks

#19 New.Canadian.DB.Owner OFFLINE  

New.Canadian.DB.Owner
  • Senior Member
  • Contributor
  • Member No: 10178
  • 2,224 Thanks
  • 1,451 posts
  • Location: Trenton, Ontario, Canada

Posted July 17, 2015 - 02:22 PM

Well, I finally got cooler weather and a day off so I could have a second go at this.  I checked all of the things MTD & Tecumseh recommended: Tygon Tube, fresh gas with stabilizer (and Seafoam), oil, intake & cooling fins, fuel filter and finally cooler air temperature.  Everything looks good, but I am still getting the bubbles.  I did notice that the engine has a slight cough / stutter / sputter thing going on.  It only happens occasionally, and I am not sure if it is a misfire, backfire, or pre-detonation, but it seems to coincide with the bubbles.  I thought maybe it was forcing air through the venturi into the carb bowel & back up the fuel line, but it I get the bubbles even with the air filter off, so it can't be pressurizing the venture.  Maybe it is just shaking the bubbles loose in the fuel filter and allowing them to rise.  I have no idea where to go from here.

 

10 -Tygon tube.jpg 11 - flywheel.jpg 12 - fins.jpg 13 - shroud.jpg 14 - oil.jpg 15 - carb.jpg 15 - main jet and bowel.jpg 15 - main jet.jpg 16 - carb and float distant.jpg 16 - carb and float.jpg 17 - bubbles.jpg


  • propane1 said thank you

#20 propane1 ONLINE  

propane1
  • Senior Member
  • Member No: 54307
  • 6,110 Thanks
  • 3,202 posts
  • Location: Charlottetown, Prince Edward Island, Canada

Posted July 17, 2015 - 04:31 PM

You got me, sorry I couldn't help, but I'll keep thinking.    Noel


  • New.Canadian.DB.Owner said thank you




Top