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Thread: Harley Davidson WL difficulties to start

  1. #11
    Join Date
    Dec 2018
    Location
    Molndal, Sweden
    Posts
    49

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    Hello! Very good point, thank you! I am currently using K&N air filter, so I will remove it and replace back the original until the issue is resolved. Once again, thanks... Ed

  2. #12

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    If you added the Marvel before refueling the oil may have not mixed well
    Your float bowl may be full of MMO.

  3. #13
    Join Date
    Apr 2008
    Location
    Oak View, CA.
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    65

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    I'm a bit confused... you said you retarded the spark advance while priming the carb.. then advanced the spark to start the engine. Try this... retard the spark for the prime steps (kick it over firmly, sometimes only one kick, but more often just two kicks, open the choke half way, then start the bike (with spark retarded, half choke), after the bike starts, open the choke slowly and advance the spark slowly to full advance... then allow the bike to FULLY warm up to operating temp. (maybe 5-6 minutes, especially in cold weather)... after ALL these steps, then proceed to adjust the carb for performance. Pay close attention to Cotten's comments !! He ALWAYS says something about intake air leaks... bubble test is the best. Cotten says the same thing so often, there must be a reason why !! So many people get impatient and neglect this MOST IMPORTANT step in setting up a bike to run properly. Way too many bikes are out there, running with intake leaks. Sometimes, these leaks are so small, they don't show up easily (even with a bubble test)... then the destruction begins, usually with poor performance. As the poor performance continues, it leads to hard starting, burned valves and piston crowns, and more. It doesn't take long for the destruction to occur. Check the timing again, in the FULLY ADVANCED position. From your description, it sounds like you're pretty close to getting it right !! Sometimes, it takes just a little more tweaking to get it correct. When you can get your bike to start on the first or second kick EVERY time, hot or cold, then you know you finally got it right !! Good luck, some people settle for a lot less. don't be that guy !! C2K

  4. #14
    Join Date
    Dec 2018
    Location
    Molndal, Sweden
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    49

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    Hi, thank you! I have drained the fuel tank and cleaned the fuel pipes now, just to secure that there is nothing left. The float seems to be ok and working well. I will have a try on the next couple of days and will post the outcome here. Ed

  5. #15
    Join Date
    Dec 2018
    Location
    Molndal, Sweden
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    Hello, today I have checked all these steps and all seems to be in order. Out of these, I noticed that the hexa screw that goes on top of the carburetor valve was loose so that I could remove it by hand (attached picture), perhaps this was part of the problem as the float working conditions should be affected.
    Other things I did was:
    1- Temporarily replaced the K&N air filter with with original one, just for the case a misfire can happen again.
    2- I noticed that the spark plug cap, in one side was not very tight. I have fixed.
    3- Cleaned up the spark plugs
    4- I drained the fuel tank and replaced the fuel.
    5- The fuel pipes from the tank to the carburetor has been cleaned
    That is all for now, I will try to start it to orrow or the day after, when the weather improves.
    Thank you, Ed
    Attached Images Attached Images

  6. #16
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    4,342

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    A loose bowl cap should not affect anything, Ed!

    (As long as any leakage does not ignite).

    The head space to the bowl is also vented elsewhere (attached).

    And ChiefTwoKicks!

    If a bubble-test misses even the tiniest of leaks, then it wasn't performed thoroughly.
    Some people think they can get by using an air mattress pump, or even a shop vac, for a guaranteed "false negative".

    ....Cotten
    PS: Beware also porosities occasionally occur other than around the nuts and seals, sometimes hard to observe. Its their evil nature.
    Attached Images Attached Images
    Last edited by T. Cotten; 12-29-2018 at 03:39 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  7. #17
    Join Date
    Dec 2018
    Location
    Molndal, Sweden
    Posts
    49

    Default Harley Davidson WL difficulties to start

    Quote Originally Posted by BigLakeBob View Post
    If you are using a foam air filter cartridge I would remove it until you resolve your problem, that little fire at the end of your video could cause real havoc if the foam filter were to engulf.
    =====

    Hi,

    Today I tried to start my motorcycle. It almost started at the second kick after priming but I decided to abort the next try because I got a bit os smoke coming out of the air cover; after a quick check by removing the air cover, I noticed that there was fuel leak coming out through the air filter. At this point I decided to remove the bowl and have a check of the float. For my surprise, when I removed the bowl and the fuel filter, I saw that it was sticky inside, most likely caused by the Marvel Mystery Oil? The fuel filter was very dirty and the sealing corks around the filter were partially decomposed...this is strange given the fact that I have replaced the, in September.
    Well, now I have replaced the brass float by a rubber-like one and have it adjusted and fitted back to the motorcycle, please check my video clip below:

    https://youtu.be/2rkHBloxwUo

    The fuel filter requires a proper cleaning and I will leave it immerse into vinegar until tomorrow. I wil replace the corks as well.

    The K&N air filter has now been replaced by the original one, at least until the issues are solved.

    I have also noticed that the three manifold bolts that holds the carburetor to the manifold were slightly loose. I have tightened it now. All other bolts and screws including the manifold nuts are very tighten and secured.

    I am attaching a picture of a device I used in September, to test the manifold for leaks. I feel confident that a new test is not necessary.
    Perhaps these three manifold bolts were not tightened as it should by mistake...

    Comments and suggestions are welcome,

    I will have a next try along the next days,

    Thank you!

    Sincerely,

    Ed
    Attached Images Attached Images

  8. #18
    Join Date
    Dec 2018
    Location
    Molndal, Sweden
    Posts
    49

    Default Harley Davidson WL difficulties to start

    Hi,
    This is just a short summary of the activities I did on my motorcycle today.
    I have removed and cleaned the fuel filter, the cork gaskets were totally decomposed for some reason, so a pair of new ones is now fitted and the filter element was cleaned with vinegar.
    As you can see in the pictures, I have checked the carburetor for leaks and all seems good now. Also the float was replaced by a rubber like one and readjusted.
    Check the video clip:

    https://youtu.be/2rkHBloxwUo

    When I removed the air filter and the float bowl I noticed that they were sticky (most likely caused by MMO).
    I think now it is time to have a try and start the motorcycle.
    I hope all should work now.
    Ed

  9. #19
    Join Date
    Dec 2018
    Location
    Molndal, Sweden
    Posts
    49

    Cool Harley Davidson WL - start problems is now SOLVED

    Dear colleagues,

    I have good news to share! My motorcycle started at once at the first kick! It works smooth and nice as you can see yourself on the videos below:

    https://youtu.be/lNOobIpDV48

    https://youtu.be/0pJx44oQv5s

    I have also measured the temperature on the over heads after few minutes idling:

    There is some difference between both heads temperature but I donít know why and I donít think they are significant?

    My only conclusion for the issue I have had before, is that the problem was in the carburetor float and the fuel filter. I have also replaced the fuel in the tank as you know.

    Out of these, nothing really was changed! What I did today, after I have mounted the float and the fuel filter back to the motorcycle, was basically to keep the fuel OFF and try to star the bike few times (5-7 times). If it was flooded, then this process helped to have the heads clean and ready for a new start. Then I followed the normal procedure, like priming and starting it.
    For your information the motorcycle started at once with the circuit breaker fully restarted (outwards) and the choke fully open (up).

    I will try to keep the bike started regularly just to warm up.

    Thank you all for your great help!

    Cheers,

    Ed
    Attached Images Attached Images

  10. #20
    Join Date
    Mar 2010
    Posts
    154

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    Ed,

    Great looking bike! Sounds good.

    Steve Slaminko

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