Solex Leak

Discussion in 'Flat Fender Tech' started by DanStew, Mar 6, 2017.

  1. Mar 6, 2017
    DanStew

    DanStew Incorrigible. Staff Member Sponsor

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    Dumb question. I pulled again my Solex because it has flooded the intake. I know the bowl was full of fuel and when i tipped the carb a bit is leaked gas. That said i looked down at it and i tipped it again the gas was not goming out of the vent but down the center venturi. Seemed odd because it was not tipped that extreme. I would think the carb would be sealed up (to an extent) until the accelorator linkage was pulled. It definately was not the vent tube. Is it normal to leak when tipped a bit?
     
  2. Mar 7, 2017
    Keys5a

    Keys5a Sponsor Sponsor

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    I am not very familiar with the Solexes, but check both the float level and that the float isn't sunk from a pinhole leak filling it up.
    -Donny
     
  3. Mar 7, 2017
    DanStew

    DanStew Incorrigible. Staff Member Sponsor

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    Float is new.

    I tried to follow the directions for float adjustment but it didnt make sense to me since if i flip it upside down to get it level with the bowl edge, it will just fall out. I do not see a real way to adjust it.

    I know I do not have a regulator before the Solex, I put a pressure gauge and it registered about 4psi.
    I did notice that when i cracked the banjo bolt for the gas fitting to the solex, it sprayed out alot of fuel. To me this is saying that the needle valve is working just fine inside the solex and sealing it up enough to keep that pressure in the line between the pump and needle valve. So i do not believe that is causing the flooding, or could I be wrong?
     
  4. Mar 7, 2017
    Alan28

    Alan28 Sponsor Sponsor

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    A Solex carb is on many cars, I have one and it works well. It must be cleaned sometimes.
    There is lot of info on the Solex carb so you could find doc.
    Maybe it is better to buy a new one or a repair kit, because it seems strange.
    Mine is on a 4cyl Hurricane. My only problem was when it was dirty inside.
     
  5. Mar 7, 2017
    DanStew

    DanStew Incorrigible. Staff Member Sponsor

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    The carb has a rebuild kit put it in. so that is why i am at a loss to what is going on. You would think with a rebuild kit you can at least get it to not flood :(

    I was looking at it more tonight and pulled off the "choke" section. I noticed that the lever to the choke circuit had alot of play to it. I could tighten the nut down to snug up the disc to the housing a bit more. Is it supposed to be tight or some play in it?
     
  6. Mar 11, 2017
    DanStew

    DanStew Incorrigible. Staff Member Sponsor

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    Still fighting the carb, but i did find something interesting this week. I pulled the main jet holder from the solex because i did not realize the jet was actually screwed into it. Well i found that the jet had like 3 turns to go before it was tight. Would this potentially be the smoking gun for leaking? I rebuilt the carb and this part was actually missing on my original carb. I just installed the holder without knowing what it actually did. So the jet was in the holder from factory. I have been busy at work and could not get the carb back on. I am hoping this might help my situation. What would a loose main jet do to cause problems in a carb?
     
  7. Mar 12, 2017
    Focker

    Focker Rust Never Sleeps Staff Member Sponsor

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    To run rich, flood the bowl = runs like crap.
     
  8. Mar 19, 2017
    DanStew

    DanStew Incorrigible. Staff Member Sponsor

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    Still battling the floodig carb.
    I took my carb off today and put it on the bench to check the float level.

    I noticed that when the accelorator linkage is worked the full will dribble out of the pump injector.
    I noticed that the injector is leaning against the center and the fuel is dripping down the metal center
    [​IMG]


    On my other parts carb the injector is not on the center
    [​IMG]

    Where is the injector supposed to be positioned? It is movable so i can change its position.
    Also it just dribbles fuel out. Where does the atomization of the fuel happen in this carb?


    And last reading more abouy the Solex, I found this passage on the M201 hotchkiss site.

    "If the problem persists then a rich mixture can be caused by fuel dripping into the manifold from the main jet casing which can also cause idling and starting problems as the contents of the float chamber can flood the manifold when the jeep stands after a run. I have come across this fault a couple of times and it is caused by the casting that supports the main jet coming loose from the mail body casting. As the two appear to be pressed together during manufacture a repair might be possible but a replacement carburettor is the better option."

    Does anyone have a picture of this press fit area? I did not notice anything when i pulled out the main jet holder. Or is this pertinant to the original Solex and not the ones made in India/China?
     

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