Results 1 to 10 of 10
  1. #1
    New Member
    Join Date
    Nov 2004
    Posts
    8
    Location
    Willis, Texas
    Tractor
    Yanmar 186

    Default YM186 runs great, then dies. I need some advice.

    Greetings,

    I have a YM186 (3 cylinder diesel 18HP) that runs great for about an hour and then very quickly the exhaust starts blowing white smoke and I loose power until the engine dies. Once cool I can start over again provided I shut down before the engine dies.

    I've tried several things.

    1. Running with the fuel cap loose to ensure it's venting.
    2. Replaced the diesel in the tank
    3. Replaced the fuel filter

    Am I over heating maybe? How would I know for sure? I don't get any lights indicating a problem.

    Thanks in advance.

  2. #2
    Veteran Member
    Join Date
    May 2004
    Posts
    1,288
    Location
    S.E Texas
    Tractor
    Ym1300d-1401D-1601D , 1610D & Massey Ferguson 1020

    Default Re: YM186 runs great, then dies. I need some advice.

    Sure sounds like a fuel starvation problem...even intermitent, it could be debris in the tank, lines or at the injectors. Maybe someone else has a better suggestion.

    Good luck,

    Mark

  3. #3
    New Member
    Join Date
    Nov 2004
    Posts
    8
    Location
    Willis, Texas
    Tractor
    Yanmar 186

    Default Re: YM186 runs great, then dies. I need some advice.

    Thanks for the reply, Mark. I, too, thought that it was a fuel supply issue. That's why the steps I've taken so far are fuel related. You mentioned lines and injectors. I haven't addressed these potential issues. Is there an additive you can add to diesel, like with gas, that will help to clean the injectors and lines?

    Does anybody think that overheating might be my problem? If so, what should I do to check? Would the oil in my engine be smoking if I were to open the fill cap when it starts to act up? Is there any other sign of overheating?

  4. #4
    Veteran Member tractorErnie's Avatar
    Join Date
    Mar 2002
    Posts
    2,214
    Location
    Bahamas
    Tractor
    Yanmars = Fx235- F255- FX335... branson 4220i tlb - hinomoto JF1 New Holland 7610 Branson 3510 tlb

    Default Re: YM186 runs great, then dies. I need some advice.

    materdai,
    do as Mark suggested, but go a little further & cleanout the tank then blow it out with an airhose, and blow all the fuel lines clean, put in a new filter & maybe replace the lines if they are old looking, add fuel & bleed it then see what happens.

  5. #5
    Member
    Join Date
    Jul 2005
    Posts
    41
    Location
    Western WA
    Tractor
    YM1820D

    Default Re: YM186 runs great, then dies. I need some advice.

    White smoke from a hot engine often indicates coolant getting into the combustion chamber. Has your coolant level dropped? (White smoke from a cold diesel on start up is a sign of unburned fuel.) Possibilities, you may have a hairline crack in the head or block that expands as the engine heats up. I don't know the injector configuration on these engines but on some, it could be a bad seal or cup at the injector.

  6. #6
    Super Member California's Avatar
    Join Date
    Jan 2004
    Posts
    5,690
    Location
    Sonoma County
    Tractor
    Yanmar YM240, YM186D, and another YM186D

    Default Re: YM186 runs great, then dies. I need some advice.

    </font><font color="blue" class="small">( thought that it was a fuel supply issue. That's why the steps I've taken so far are fuel related. You mentioned lines and injectors. I haven't addressed these potential issues. Is there an additive you can add to diesel, like with gas, that will help to clean the injectors and lines?

    Does anybody think that overheating might be my problem? If so, what should I do to check? )</font>

    Signs of overheating would include boiling out the coolant. If the coolant level is unchanged then there isn't enough heat to make it quit running.

    I think everything points back to fuel not reaching the injector pump. I suggest when it quits, immediately open the air bleeder at the entry to the injector pump to see if fuel runs out.


  7. #7
    New Member
    Join Date
    Nov 2004
    Posts
    8
    Location
    Willis, Texas
    Tractor
    Yanmar 186

    Default Re: YM186 runs great, then dies. I need some advice.

    Thanks, California. I'll give your suggestion a shot. Is the bleeder at the injection pump the first bleeder? The fuel line running from the fuel filter to the engine connects on the engine and there is a bleeder there, is this the one I need to check? Sorry for the ignorant question.

  8. #8
    Super Member California's Avatar
    Join Date
    Jan 2004
    Posts
    5,690
    Location
    Sonoma County
    Tractor
    Yanmar YM240, YM186D, and another YM186D

    Default Re: YM186 runs great, then dies. I need some advice.

    </font><font color="blue" class="small">( The fuel line running from the fuel filter to the engine connects on the engine and there is a bleeder there, is this the one )</font>

    That's the one.


  9. #9
    Gold Member
    Join Date
    Sep 2005
    Posts
    390
    Location
    ne kansas
    Tractor
    YM 2210

    Default Re: YM186 runs great, then dies. I need some advice.

    Those little fuel bowls shrink overtime and u get a little leak. I got a new bowl from hoye and wa la fixed.. You have to rebleed everytime u open up the fuel system. Most of the time you do not have to open the lines but just use the bleeder screws.....

  10. #10
    Gold Member
    Join Date
    Jan 2002
    Posts
    305
    Location
    Northwest GA USA
    Tractor
    Kubota L3710DT & Yanmar 186D

    Default Re: YM186 runs great, then dies. I need some advice.

    Do you store this tractor outside (or has it been stored outside in the past) and does it still have the OEM "gauge type" fuel cap? These have always been prone to leak and can easily let water into your fuel system. Once the water gets in, it is easy for algae to form in the tank. This stuff floats around and can block the tank's fuel outlet, starving the injection pump. I would recommend inspecting your fuel tank closely to see if this could be your problem.

    Jeff

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.