Water in the driveshaft?

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  • vikkip


    Replies: 35
    Topics: 2
    #4694

    I’ve been resurrecting a 1950 TN26 that’s been sitting for 49 years and it now starts and runs on one pull. It spits water out of the tell-tale. It has two issues:

    Once it’s been running 5 minutes or so, it starts to run roughly and spit out the slow needle port. If I put it in gear and throttle up, it will start to bog and will stall within a minute or so. (running in a barrel)

    Also it is spitting water out of the top of the driveshaft tube through two small slits on the side of the tube. I don’t think that’s supposed to happen.

    I am brand new to outboards, so advice to this rookie is appreciated!


    frankr

    US Member - 1 Year
    Replies: 6245
    Topics: 49
    #39838

    Check the fuel filter in the tank. Spitting is a sign of running lean (not enough fuel)

    I’m not sure what slits you are speaking of, but it probably is normal. Probably exhaust relief ports. Spent cooling water goes out with the exhaust. Perhaps somebody with a TN can look and confirm.


    wedgie


    Replies: 1011
    Topics: 78
    #39840


    These two holes ? Edit: oops, the pic is of a tn20


    vikkip


    Replies: 35
    Topics: 2
    #39842

    That’s them! I was just marking up a photo. All the manuals and forums mention watch the tell-tale, which is in the elbow on the other side, but I hadn’t found any reference to those holes/ports/whatever they are.


    wedgie


    Replies: 1011
    Topics: 78
    #39843

    Sorry, It’s been a while since I’ve had this one running so I don’t remember noticing water coming out those two holes. 😳


    Mumbles

    Canada Member - 2 Years
    Replies: 5514
    Topics: 293
    #39848

    Idle relief ports?


    frankr

    US Member - 1 Year
    Replies: 6245
    Topics: 49
    #39854

    Exactly, they are exhaust relief ports to reduce back pressure for easier starting and better idle. And the cooling water that has gone through the powerhead and done it’s job does blow out those holes. It was on it’s way back to the lake anyway.


    49hiawatha


    Replies: 265
    Topics: 25
    #39856

    Frank over the past few years I have learned so much from you I just want to thank you. You remind me of my Hudson mentor in 1961 (Al Wolf) who took me as a kid under his wing, showed me the ins-out of Pre WWI Knox, Hudsons etc.He made me the 1948-54 Hudson expert that I became . Now I have downsized and gone to the outboards. Take care but your knowledge lives on to all who want to learn.


    aquasonic

    US Member - 2 Years
    Replies: 539
    Topics: 38
    #39857

    Water spray from the exhaust relief ports is 100% normal. It would be of concern if there was no water coming out of those ports.


    vikkip


    Replies: 35
    Topics: 2
    #39876

    That’s great news! Thanks to all of you. It’s hard being a brand new owner of a 66 year old motor that sat for 49 years, when I have no experience at all in boats or motors. Gotta start somewhere…

    I was reading random threads in the forum last night and learned there was supposed to be packing around the slow needle. So I removed the needle and its nut and found some cardboard like crumbs, which I picked out as best I could. I made 3 washers from thin chrome tanned leather and soaked them in WD-40 then installed them along with the needle and nut. I hope that works!


    joesnuffy

    US Member - 1 Year
    Replies: 356
    Topics: 23
    #39879

    I have heard of people using waxed dental floss or fishing line in a pinch if your on the water. Your method sounds like a winner.

    Joe


    vikkip


    Replies: 35
    Topics: 2
    #39887

    I was getting ready to pack the motor up for a trip this weekend and found it dumping gas. The float is sticking, so I think some junk must have found its way into the carb despite cleaning the tank and lines. Coming apart again…


    aquasonic

    US Member - 2 Years
    Replies: 539
    Topics: 38
    #39933

    If the float has recently been refinished, they do have a tendency to stick wide open. If you could wait a month or so to test it after refinishing that might not happen, but most of us don’t have that kind of time and patience. Eventually, the problem will go away with time and use.

    In the meantime, keep a small piece of wire with you when you turn the fuel on. If the float sticks, and the carb starts dumping fuel, insert the wire into the needle guide on the carb cover, and tap the top of the float needle until it comes free and floats as it should. Also, light tapping on the bottom of the carb with a screwdriver handle/dowel/etc. will often free the float.

    If I have a motor with a float that I suspect may stick, I will turn on the fuel, and then turn off the fuel immediately to fill up the bowl. If no leaks, then turn the fuel back on and you’re good to go.

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