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Subject: Vapor lock on Ford 600

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Charles    Posted 06-26-2018 at 08:27:03 [URL] [DELETE]        [Reply] [Email]  
  • Vapor lock on Ford 600
  • I'm experiencing vapor lock on my 600. syptoms: Hot day heavy work,stumble,let it cool down (idling,or set,or switch to lower gear) then good for anther half hour. When completly stall, set, then hear a gurling burp, then starts up.
    87 octane with alchol.
    Is there a adaptor to go on exhaust manifold to go to a vertical exhaust (get rid of muffler under heat shield and gas tank and fuel line.
    Other suggestings of possible problems, to look for?
    Charles Krammin

    Jack - Iowa    Posted 06-26-2018 at 16:24:40 [URL] [DELETE]        [Reply] [Email]  
  • Re: Vapor lock on Ford 600
  • Charles,

    If the 600 is built like the 860 you may have a gas line location problem. Put a new gas line on my 860. It runs down between the engine block and the exhaust manifold. If it gets too close to that manifold you will have a problem which I would call vapor lock. Space the gas line in the center or slightly closer to the engine block.

    If it walks like a duck, quacks like a duck, it likely is a duck!


    Charles    Posted 06-26-2018 at 15:37:07 [URL] [DELETE]        [Reply] [Email]  
  • Re: Vapor lock on Ford 600
  • Thanks for all the replies. I have done all as suggested, except kersone.
    This carbaratuer was replplaced, with a new one about 5 years ago. Not sure where it came from (origin). Does a carbaratuer have a vent above the float to allow the float to sense fuel level onlY? Is it inside air tube before the vanturie?
    Maybe Royse could answer this.
    My next dignosis will be to clean out sediment bowl and screen and then if it still happens, loossen the fuel line inlet as thaat appears where it is lacking fuel (same as when it does run out of fuel).

    Larry Holbrook    Posted 06-26-2018 at 12:37:17 [URL] [DELETE]        [Reply] [Email]  
  • Re: Vapor lock on Ford 600
  • In 1964 had a brand new Ford 4000. It did that on hot days plowing. Seemed like it did it when I was plowing one field in particular that had a lot of clay and was working hard. Just had to set under a shade tree for a while. It was brand spanking new and did it. Not sure why. Sounded like the gas was boiling like you mentioned. I was only 13-14 years old and I know it scared me!

    steveVa    Posted 06-26-2018 at 10:02:17 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Vapor lock on Ford 600
  • I have the vertical exhaust on my Jubilee and it works great. Be sure to get the little flapper that goes on top that keeps the rain out.
    When it starts acting up, turn it off and remove the gas cap for two seconds and put it back on. Then if it starts right back up you know that venting the gas tank is the problem.

    Bruce (VA)    Posted 06-26-2018 at 09:18:19 [URL] [DELETE]        [Reply] [Email]  
  • Re: Vapor lock on Ford 600
  • Once you determine it's not vacuum locking, then the gas might be boiling. Add a pint our 2 of kerosene.

    Dean    Posted 06-26-2018 at 09:10:04 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Vapor lock on Ford 600
  • As already mentioned, it cannot be vapor lock by definition.

    That said, boiling gasoline can cause such symptoms and is potentially dangerous.

    Is the muffler heat shield in place? If not install one.

    Avoid gasoline with alcohol if possible.

    Yes, you can remove the OEM muffler and install a vertical exhaust with muffler outside of the hood.


    Farmer Dan    Posted 06-26-2018 at 08:42:03 [URL] [DELETE]        [Reply] [Email]  
  • Re: Vapor lock on Ford 600
  • Your gas tank is not vented properly or enough. Leave your gas cap off over night so the ethanol can evaporate out of the fuel. If that solves your problem then you need to make sure you gas tank and cap are venting correctly.

    Tim Daley(MI)    Posted 06-26-2018 at 08:40:04 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Vapor lock on Ford 600
  • You cannot have a vapor lock with these Ford updraft fuel systems. A vacuum lock, yes, maybe. A vapor lock can only happen on systems using a fuel pump which these don't have. When it starts dong that, check to see if the gas is boiling. Try a vented gas cap?

    Tim Daley(MI)

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