RDE-17 25 hp 1955 Johnson-Drain hole (water) NOT drilled all the way through to

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  • outboardnut
    outboardnut

    US Member - 2 Years
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    #221309

    Well – someone in 1955 was was hung over and did not drill the drain hole all the through to the weep hole.
    I know your going to say that crude gets in there and is hard to get out.But for SURE the hole was not drilled all the way down.
    I do not have the facilities to drill the hole all the way.
    Nor do I want to spend the money to have the hole drilled all the way.
    My question is this
    Would you still use the gear case even through the drain hole does not function????????

    drain

    drain-3

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    bobw
    bobw

    US Member - 1 Year
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    #221319

    I would think this drain passage was not something that was drilled but was part of the factory casting. I’d poke around in there with some real stiff wire or maybe a drill bit on an extension and be sure it’s not just plugged up. On my QD-20 I thought sure the drain did not go through to the drain hole – 2 days of digging around finally cleared the rock hard blockage.

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20
    1957 Evinrude Fastwin 18

    "Every 20 minute job is only a broken bolt away from a 3-day project."

    outboardnut
    outboardnut

    US Member - 2 Years
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    #221321

    I did drill in the hole
    Would you still use the gear case even through the drain hole does not function????????
    ?????????????????????????????????????????????????????????????????????

    drill-bit

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    bobw
    bobw

    US Member - 1 Year
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    #221324

    Well, I wouldn’t use it unless you want to pull the lower unit off and drain the water before you put it up for the winter. Maybe some others with more experience will weigh in on this but I’ve never seen or heard of one that had a bad casting at the drain passage. I’ve had to drill the passage on every one of my motors and just found them plugged up. A couple drilled very easily and quickly but my QD-20 and RD-18 both took a lot of work to clear them out. When you drilled yours, did you get any dirt/debris on the drill bit or did you get aluminum shavings?

    Edit – you say you drilled in the “hole”. From your picture, I assume you mean you drilled from the top of the case down into the drain passage and not into the drain hole itself?

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20
    1957 Evinrude Fastwin 18

    "Every 20 minute job is only a broken bolt away from a 3-day project."

    • This reply was modified 6 days, 14 hours ago by bobwbobw.
    frankr
    frankr


    Replies: 5408
    Topics: 48
    #221327

    Most of them are plugged. You could lay the motor down on it’s backside to drain the cavity before standing it up for winter storage.

    outboardnut
    outboardnut

    US Member - 2 Years
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    #221328

    I drilled from the top
    I hit debris
    then hit aluminum
    I also cleared the other hole
    When I drill- I put some naphtha in the hole
    For two reasons
    It helps dissolve the debris
    plus it -leaks out the side hole telling me I went through

    outboardnut
    outboardnut

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    #221329

    Video of tapping the bottom of hole

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    fleetwin

    US Member - 2 Years
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    #221330

    Well, I would swear I have run into this “undrilled” situation before also, but it is hard to say….The problem is you have to be so careful, you must know where your drill is at all times, you sure don’t want to drill thru and puncture the oil cavity….I would certainly mark the drill bit with some tape or something to make sure you don’t drill too far.
    You have that gearcase all apart now, I would definitely clear the drain hole….Water trapped during the winter could split the housing open, have seen that happen more than once….

    outboardnut
    outboardnut

    US Member - 2 Years
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    #221332

    I do not have the facilities to drill the hole all the way.
    Nor do I want to spend the money to have the hole drilled all the way.
    I consider the upper gear case detective
    Some guy in 1955 was hung over on a Monday
    I am not going to pass the problem on to some future guy
    Time to move on

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    fleetwin

    US Member - 2 Years
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    #221334

    I’m confused, your video looks like you have solved the issue with some sort of drill bit/wire rig set up…..

    outboardnut
    outboardnut

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    #221335

    The video shows that the hole does not go all the way through to the weep hole
    Something went wrong in casting

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    dave-bernard

    US Member - 2 Years
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    #221340

    drill the weep hole higher.

    frankr
    frankr


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    #221341

    drill the weep hole higher.

    Dang! That makes sense!!!

    outboardnut
    outboardnut

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    #221342

    That would take a bit of creative measuring.
    But doable
    It would be nice to save this gear case
    The halves are a matched set
    I already sandblasted it
    Also removed the rusty race

    need advice-how to get out bearing race

    bobw
    bobw

    US Member - 1 Year
    Replies: 1175
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    #221347

    I forgot this was the one with the rusty gearcase. As bad as it was rusted up, I’d bet it got a lot of water and dirt in it at some point and the drain passage is just clogged up. After watching your video, I was reminded that a couple of mine had the exact same metallic clanking sound when probed with a small rod. I measured the distance from the top of the gearcase to the top of the drain hole itself and marked that dimension on my long drill bit to prevent over-shooting the drain hole. I thought sure I might have been screwing something up, but I eventually worked through the clog to the drain hole. After all those years, that crap sets up like concrete in there.

    On another one of mine, the passage was blocked up and I cleared with a jet nozzle on my pressure washer.

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20
    1957 Evinrude Fastwin 18

    "Every 20 minute job is only a broken bolt away from a 3-day project."

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