1952 Johnson Seahorse qd 13

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This topic contains 64 replies, has 17 voices, and was last updated by Avatar shoestringmariner 2 years, 2 months ago.

Viewing 15 posts - 46 through 60 (of 65 total)
  • fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #51332

    Before I put the gearcase back together with new seals I had to get rid of some pretty bad pitting on the thrust washer for the pinion gear. I should have taken a before picture, but here is what it looked like after a little ride on the surface grinder. I had to take about 0.007" off to get rid of nearly all of the pitting. Considering the pitted surface would have eaten 0.007" away from the bronze bearing in short order, I think this was my best option. It should run a long time now. Almost ready to wrap this one up. Need to pressure test the gearcase after the reseal and make a new gasket for the lower section of the exhaust housing. Then it gets reassembled and new gear oil and it will be ready for boating season.
    -Ben

    OldJohnnyRude on YouTube

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    garry-in-tampa
    Lifetime Member
    Replies: 3072
    Topics: 30
    #51375


    You will probably have to install a shim washer to adjust the gear lash.
    . . 😉

    fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #51394

    I thought about that being a possibility too. After assembling it dry, the gear fit felt as good or better than most high mileage gearcases I have been into. It has the big, nearly straight cut gears in it and I think it will be OK without shimming it. I’ll try running it some and if it seems like it will need a shim, I’ll go back in and shim the excess lash out of the gears. I’ll pay extra attention to it Garry and thanks for the heads up.
    -Ben

    OldJohnnyRude on YouTube

    fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #51411

    I got the gearcase back together and pressure checked it. At ~8psi it showed zero leakage after 40 minutes and actually came up a bit to around 9psi with the temp in the shop and my handling it while reinstalling the shift rod connector and water pump… twice… but we won’t go into that right now. 😳

    And I got the lower unit reattached along with the shift rod. It’s ready to be reassembled once I make a new gasket for the lower section of the exhaust housing.

    It’s almost back together. Hopefully tonight I’ll finish it and it will be another one ready for a boat test when the water softens up again.
    -Ben

    OldJohnnyRude on YouTube

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    rjoynt
    US Member - 1 Year
    Replies: 138
    Topics: 25
    #51434

    I promise to not hi jack your thread. But you pushed me into working on a QD13 that I have had for the last few years. New points and condensers, changed lower unit fluid, and it fired right up! No one told it that it hadn’t run in decades! Pumped great water. There is a lower unit leak that has to be attended to
    Thanks!

    fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #51436

    Excellent! Glad to know my posts have convinced you to get yours going too. 😉 I’m going to try to wrap mine up tonight. I’ll see if I can get there.
    -Ben

    OldJohnnyRude on YouTube

    fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #51448

    I got her did! All back together and rest for a boat test… when the water goes back to liquid. Here she is all back together. Hopefully there are no unforeseen gremlins when I get to run it on the boat.

    You just can’t duplicate the patina on this thing. It’s so ugly it has to stay this way.

    Thanks for following my progress and watch for the video of the boat run this coming season.
    -Ben

    OldJohnnyRude on YouTube

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    grunt311
    US Member - 1 Year
    Replies: 15
    Topics: 14
    #51639

    Ben
    How do you pressure test the gear case and why? I assume it is for leaks but figure i would ask now before mine explodes half way around the lake then i will have a real problem.

    Rjoynt– Welcome to the QD blog i am new to all of this and Ben has provided with answer to my many questions.

    Thanks for the help
    Nick

    fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #51644

    Nick,
    You are correct. Pressure testing is done to check for leaks. I have heard it best to check at around 6 psi and again at around 10 psi. Let it sit with pressure in it for an hour or so and see how much it loses over that time. I like to also rotate the drive shaft, prop shaft, and shift the shift rod while it’s under pressure to see if that induces leaks.

    To perform the pressure test, first drain the gearcase. With one of the plug screws still in place screw the tester into the other. Bring the pressure up to the low reading and check it after an hour or so. If it holds raise the pressure to the higher reading and check again after an hour or so. If it holds, all is well. If it leaks down much, there is a problem with the seals. You can submerge the gearcase in a bucket of water or use soapy water in a sprayer to find the leak(s). I even sometimes use spray oil to look for bubbles.

    An honest to goodness pressure tester for gearcases is a rather expensive instrument. I have not yet sprung for one, but I may sometime for convenience. I made mine in my shop from a piece of aluminum round bar, a 0-15psi air gauge, and a air tank valve from the hardware store. I have about $15 and a couple hours in mine and it does fine.

    If you do not have one, just inspect your gear oil and make sure there is no water in it. When you change the oil and have run the motor again, check the oil.for water again after the motor has hung on the transom or a stand for a couple days and see if you get water or milky oil out of it. As long as its keeping water out, you’re OK.

    Here is a picture of a Steven’s pressure tester.

    I’ll takea picture of my creation and post it tonight when I can get to the shop.
    -Ben

    OldJohnnyRude on YouTube

    fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #51660

    Here is a shot of my home-built pressure tester. I use a tire pump or regulated compressed air to pressurize the gearcase.
    -Ben

    OldJohnnyRude on YouTube

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    david-bartlett

    Replies: 1228
    Topics: 105
    #51664
    quote Fisherman6:

    Here is a shot of my home-built pressure tester. I use a tried ump or regulated compressed air to pressurize the gearcase.
    -Ben

    Ben,

    Nothing wrong with that!

    fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #53290

    Maybe I should have started a new thread rather than bump this old one back to the top. I just wanted to follow up since I had this motor on the boat for the first time today. It ran well. I just made a few hot laps in the backyard puddle with it. I’ll get it on the lake later in the season and let it stretch it’s legs a bit more but for now it ran well on the boat. 66°F and sunny in mid Feb in SE Michigan so I had to get the boat out. Below is a link to the video.
    -Ben

    OldJohnnyRude on YouTube

    Buccaneer
    Buccaneer
    US Member - 1 Year
    Replies: 2992
    Topics: 835
    #53292

    So nice to see water again. Going to be a little while in North Central MN.
    Looks like you have a winner with the QD-13.
    I got a free one eight years ago. I got it running,
    but only in the barrel so far. It’s on the list to
    try out on the lake this Spring. Three more this
    winter gone thru, or re-visited, so I’m anxious
    for "soft" water!!

    Prepare to be boarded!

    fisherman6
    fisherman6
    US Member - 2 Years
    Replies: 1737
    Topics: 39
    #53298

    Thanks Buc! It turned out pretty well and it seems to be a pretty strong runner. The lakes are still a bit crusty here. Not safe for ice fishing, but not boatable yet either. Insure am glad to have gotten a shot at running the boat on the pond. I was way past ready. Since last season I have gone thru or revisited a bunch. I can’t remember them all off the top of my head. Really looking forward to the lake. I may actually put some time on this motor this year. I do like the twist grip throttle for everyday use though. Glad to hear you plan to get your QD-13 on the lake this year.
    -Ben

    OldJohnnyRude on YouTube

    Avatar
    dcarter36

    Replies: 1
    Topics: 0
    #55860

    I’m brand new to this forum but am hoping for some help. I am in the process of restoring my 1952 QD-13 and have run into a dead end regarding a carburetor kit. Does such a thing exist? Thanks for any help.

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