1958 super sea horse

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  • tinkerman

    US Member - 1 Year
    Replies: 182
    Topics: 28
    #239771

    Ok I’ve been away a while working on a 1930 Pontiac but I’m back. I’m going this weekend to pick up a 1958 thompson wood boat and it has a super sea horse 50 hp. Would anyone have a lead on impeller and carb kit? It’s been stored since 1980 so I’m figuring this is bear minimum. Are there NOS parts floating around for these ? I know the smaller HP motors if you ask around enough you can find about anything but are the bigger motors of this era the same?

    It's a jungle out there.


    fleetwin

    US Member - 2 Years
    Replies: 3829
    Topics: 39
    #239773

    You should be able to find common service parts fairly easily for this engine…


    crosbyman

    Canada Member - 2 Years
    Replies: 2121
    Topics: 227
    #239875

    http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1958&hp=50

    Joining AOMCI has priviledges 🙂

    1 user thanked author for this post.

    tinkerman

    US Member - 1 Year
    Replies: 182
    Topics: 28
    #239892

    I’m finding a lot of parts at marine engine but no carb kit. A couple of other places have them listed but say their out of them. The guy said the carb was drained for storage and by looking at the boat I’d say this guy was meticulous… But 40 years? No way the carb is still good…. Right? I did find an impeller but what gaskets might I need to tackle this job? Seals? Or just get it running first? Thanks

    It's a jungle out there.


    fleetwin

    US Member - 2 Years
    Replies: 3829
    Topics: 39
    #239917

    Well, I guess I would so some basic checks before doing any major work. No sense rebuilding the carb on an engine with low/uneven compression or a gearcase full of water….Check to see if it has spark on all four cylinders, you may need to clean and readjust the points. Then I would try to start the engine to see how/if it runs.
    From the looks of the picture you posted, it would appear that the engine was carefully maintained. The carb may not need cleaning/rebuilding if in fact it was actually drained prior to being stored.
    If the engine seems to run OK, then I would pull the gearcase and replace the pump/impeller. But again, be sure to drain/inspect the gear lube first. Milky lube, or raw water draining out spells trouble. In that case, once the gearcase is removed it should be pressure tested to pinpoint leakage issues.


    tinkerman

    US Member - 1 Year
    Replies: 182
    Topics: 28
    #239991

    Your thinking of the other post about pics but here’s one yes pretty clean

    It's a jungle out there.

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    tinkerman

    US Member - 1 Year
    Replies: 182
    Topics: 28
    #239993

    Trying to get them all on one post but didnt

    It's a jungle out there.


    tinkerman

    US Member - 1 Year
    Replies: 182
    Topics: 28
    #239994

    Anyway can’t get other pics to load

    It's a jungle out there.

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    tinkerman

    US Member - 1 Year
    Replies: 182
    Topics: 28
    #240141

    Ok I went and picked up the boat. The gentleman said it was getting fire and that he had went thru the lower unit in the fall and replaced bearings and seals he said the impeller looked no different than a brand new on out of the box. I got it home and put it in a Barrel but when I pumped the bulb both tanks were leaking. It did fire once but then nothing else. I drained the barrel and before I came out I bumped the switch and it fired right up for a brief Instant. The bad news is I took the plugs out to see if they were wet and the lower on starboard is STRIPPED. SO I’m needing a head for the starboard side 1958 Johnson 50 hp if anyone can help or has suggestions thanks

    It's a jungle out there.


    tinkerman

    US Member - 1 Year
    Replies: 182
    Topics: 28
    #240148

    Also on the fuel tank, it’s leaking from the top when you squeeze the bulb. Would this just be the gasket or would it be the diaphragm leaking? Any thoughts? It also has an original tank mounted under the port seat that looks to be larger than a 6 gallon?

    It's a jungle out there.


    fleetwin

    US Member - 2 Years
    Replies: 3829
    Topics: 39
    #240150

    It concerns me that the previous owner had the gearcase all apart….I would keep an eye on the oil level in the gearcase and change the fluid frequently….


    tinkerman

    US Member - 1 Year
    Replies: 182
    Topics: 28
    #240172

    He’s a mechanic by trade and he was fixing known issues. He seemed like an honest guy. Would the leaky gas tank cause the engine not to run?

    It's a jungle out there.


    frankr

    US Member - 1 Year
    Replies: 5706
    Topics: 49
    #240185

    The leaky tank could be sucking enough air to prevent filling the carb. Whether it is or not, there are tiny orings that are shot and need to be replaced. An easy job.


    ede

    US Member - 2 Years
    Replies: 165
    Topics: 5
    #240259

    Send me an email note, do have NOS cyl head and some carb parts and OH gaskets set Ed Elliott, eddelliott@cox.net

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