Help getting my 67 Evinrude 3hp started

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    Elecmuso


    Replies: 38
    Topics: 1
    #195996

    Thanks everyone.
    Removing hose from carb and there is no fuel flowing out of the carb.
    When I do the blow test no air gets in.
    The lower hex train plug – you mean part 34 in the carburetor parts diagram here
    https://outboard-boat-motor-repair.com/Evinrude%203%20HP%20Lightwin%20Outboard%20Boat%20Motor/Evinrude%20Johnson%203%20HP%201952-1954%20Parts%20Manual.htm
    Upon close inspection it appears that this has been snapped off at some point!

    Drain

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    Elecmuso


    Replies: 38
    Topics: 1
    #195999

    Thanks everyone.
    Removing hose from carb and there is no fuel flowing out of the carb.
    When I do the blow test no air gets in.
    The lower hex train plug – you mean part 34 in the carburetor parts diagram here
    https://outboard-boat-motor-repair.com/Evinrude%203%20HP%20Lightwin%20Outboard%20Boat%20Motor/Evinrude%20Johnson%203%20HP%201952-1954%20Parts%20Manual.htm
    Upon close inspection it appears that this has been snapped off at some point!

    Drain-1

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    Elecmuso


    Replies: 38
    Topics: 1
    #196002

    So looks like I have a blockage still.

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    Elecmuso


    Replies: 38
    Topics: 1
    #196007

    Th blockage was inside the carb. As far as I can tell the float is not ‘adjusted to level’ properly. it seems that although the needle valve works with the bowl off (tested by blowing in the inlet with the bowl off and lifting the float up and down) it is not horizontal which means putting the bowl on permanently closes the valve.

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    fleetwin

    US Member - 2 Years
    Replies: 3415
    Topics: 51
    #196008

    No, not #34 in your drawing….The big 7/16″ hex plug right in front of the carb….Remove that plug, fuel should flow from the carb with the fuel valve and air vent open….
    You could always perform one more test to be sure there are no ignition problems…..Simply remove the spark plugs, squirt some gas/oil mix into both cylinder, then crank the engine over….The engine should fire briefly if ignition is OK and lack of fuel is an issue….

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    Elecmuso


    Replies: 38
    Topics: 1
    #196009

    carb

    float

    In the above 2nd photo the float at rest is not horizontal (motor inverted – gravity pulling float down / valve closed). Lifting float (ie. towards prop end) opens valve as confirmed by blowing into opening indicated by screwdriver. But putting bowl back on and screwing on results in float permanently closing the valve.

    Guess that means I need to ‘adjust the level’ of the float but yet to find instructions on how to do this.

    • This reply was modified 7 months ago by AvatarElecmuso.
    • This reply was modified 7 months ago by AvatarElecmuso.
    • This reply was modified 7 months ago by AvatarElecmuso.
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    frankr
    frankr


    Replies: 5301
    Topics: 48
    #196014

    Bend it in the region of the small hole in the float arm.

    If I am seeing it right, the clip is missing off the inlet needle, The clip in necessary to drag the needle off the seat when the float drops down

    EDIT: That thing doesn’t look right. Very unusual to see a float that far off horizontal..

    • This reply was modified 7 months ago by frankrfrankr.
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    Elecmuso


    Replies: 38
    Topics: 1
    #196019

    I watched a video just now in which the guy realised the washer that I’m indicating below with an arrow, was a bit thick. He changed his for a new one from his carb kit. I didn’t change the washer but I did tighten the valve seat a bit which has the float sitting a bit more horizontal, though still not quite there. If I tightened further I could probably compress the washer just enough, but how hard should I be tightening?

    float2

    • This reply was modified 7 months ago by AvatarElecmuso.
    • This reply was modified 7 months ago by AvatarElecmuso.
    • This reply was modified 7 months ago by AvatarElecmuso.
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    Elecmuso


    Replies: 38
    Topics: 1
    #196022

    The clip is on there just hard to see

    float2-1

    • This reply was modified 7 months ago by AvatarElecmuso.
    • This reply was modified 7 months ago by AvatarElecmuso.
    • This reply was modified 7 months ago by AvatarElecmuso.
    • This reply was modified 7 months ago by MumblesMumbles.
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    wedgie


    Replies: 983
    Topics: 94
    #196060

    I would replace the old cork float with a new plastic one.

    Just snug up the valve seat firmly with a screwdriver that fits that slot as closely as possible. Don’t want to over tighten.

    Adjust if necessary by using two sets of needle nose to bend the float arm. Needle nose in each hand ,grip the float arm fore and aft of where it contacts the valve needle and tweak it to level. . Fine adjustment is easier and more effective than any other way.

    • This reply was modified 7 months ago by Avatarwedgie.
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    crosbyman

    Canada Member - 1 Year
    Replies: 1624
    Topics: 197
    #196070

    The JW series of motors is extensively covered in the JOHNSON BIBLE at boat info

    http://www.boatinfo.no/lib/johnson/manuals/1922-1964johnson.html

    why not take some time and read a bit to acquaint yourself with these small motors and the general knowledge of carburation and ignition the two most critical topics

    all the info you need to know in that book print off what you need to a PDF file Carb float adjustments for the JW is in there starting at page 100

    http://www.boatinfo.no/lib/johnson/manuals/1922-1964johnson.html#/106

    your “modern” JW has no HS adjustment …just a fixed jet behind the bottom 7/16 hex bolt at the bottom has stated above so just unscrew the bolt plug and clean out the jet has explained

    the float MUST be parallel to the carb body held upside down

    did you clear the air vent holes in the fuel cap ??

    Joining AOMCI has priviledges πŸ™‚

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    crosbyman

    Canada Member - 1 Year
    Replies: 1624
    Topics: 197
    #196071

    just posted some in on the “boat information” red book johnson bible place… and POOF everything went out the window

    why is this still happening πŸ™ πŸ™ πŸ™

    Joining AOMCI has priviledges πŸ™‚

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    crosbyman

    Canada Member - 1 Year
    Replies: 1624
    Topics: 197
    #196072

    here goes again

    see URL IN THE PICTURE all the info you need for your JW is there pages 100 and up in the johnson red book covers carbs for the JW

    Joining AOMCI has priviledges πŸ™‚

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    Elecmuso


    Replies: 38
    Topics: 1
    #196078

    So just got it started!. Fixing that float was one issue, the other was the plugs – they WERE connected around the wrong way.

    After a few minutes it was purring at idle. A lot of smoke but I guess that is what you can expect at 25:1.

    Thanks for all the help!

    Now I know it can run I’ll properly refurbish it. I need:
    Carby kit with float, needle valve and seat, float bowl gasket.
    New gas tank tap (original one I have is a bit leaky).
    I will need to check cooling system / impeller and probably a new one.

    Suppose Ebay is the place for these. Please recommend a kit if you can – some have bad reviews.

    BTW, this one is a suitcase / folding model. Not sure if that is a good or bad thing.

    • This reply was modified 7 months ago by AvatarElecmuso.
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    fleetwin

    US Member - 2 Years
    Replies: 3415
    Topics: 51
    #196084

    Cool, glad it is running..Make sure it is cooling OK also….

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