Oil and Mix for 1916 Koban

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    limnos

    US Member - 2 Years
    Replies: 3
    Topics: 2
    #235933

    Finished my working restoration of my 1916 Koban. Intend to try running at Tomahawk. What would be the best oil to use for the mix and what ratio? I have never run a Koban before. Restored it to be a “runner”, new gaskets, corn head grease on water pump gears, etc.

    Koban-1916-UW-Ex-Restored-1

    • This topic was modified 1 week, 4 days ago by MumblesMumbles.
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    bobw
    bobw

    US Member - 1 Year
    Replies: 1349
    Topics: 45
    #235935

    Well, I couldn’t tell you what the oil mix is, but I can tell you that is one of the most OUTSTANDING antique restoration projects I’ve seen! I would be afraid to use it! Congrats on a magnificent job.

    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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    lloyd

    US Member - 2 Years
    Replies: 273
    Topics: 2
    #235937

    It’s beautiful!!!!!

    BROOK E. NEWCOMB
    BROOK E. NEWCOMB

    US Member - 2 Years
    Replies: 50
    Topics: 2
    #235940

    Excellent job looks Great!

    I have a 1915 Koban 1/2 pt per gallon has served it well.
    I like Pennzoil two cycle tcw 3

    Opinions will vary.

    Respectfully,

    1 user thanked author for this post.
    Mumbles
    Mumbles

    Canada Member - 2 Years
    Replies: 4850
    Topics: 268
    #235959

    I think I was once told they like a heavy mix, like 8:1, as they have iron pistons running in iron cylinders. Not sure.

    BROOK E. NEWCOMB
    BROOK E. NEWCOMB

    US Member - 2 Years
    Replies: 50
    Topics: 2
    #235961

    Nice to see another one with underwater exhaust!
    I have a 1918 with underwater exhaust an option
    That you rarely see.

    Respectfully,

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    pm-t2

    Canada Member - 2 Years
    Replies: 445
    Topics: 25
    #236014

    Beautiful motor. You can run it with the fuel/oil mix as Brook suggested.

    I myself prefer to run these at 8:1, but that’s just my personal preference/prejudice.

    Hope it helps.

    Best,
    PM T2
    Kobunn Special Interest Group Leader

    1 user thanked author for this post.
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    george-emmanuel

    US Member - 1 Year
    Replies: 422
    Topics: 29
    #236388

    You will find that you’ll need an extra large amount of space to turn the boat when underway, and even then, it may not turn where you want it to go. When the rudder is turned, the prop wash bypasses and goes straight out making it difficult to turn. Wasn’t a real efficient design, but the motors run well! Beautiful restoration!

    George

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    limnos

    US Member - 2 Years
    Replies: 3
    Topics: 2
    #236409

    Thanks for the info. In the past, I was told I might want t use 4 stroke oil (As they did in the period), but two stroke is OK? I assume non-synthetic? I have heard synthetic is just too thin for these older motors.

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    limnos

    US Member - 2 Years
    Replies: 3
    Topics: 2
    #236411

    I know you need a buzz coil for each cylinder, but do you also need a separate battery for each buzz coil, or can you run them both off a single battery. 6v lithium type?

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    BRIAN RUPP

    US Member - 1 Year
    Replies: 10
    Topics: 2
    #236453

    Do you know what weight oil was spec’d for it originally? Guessing SAE #30 or #40? Someone correct me if I am askew. I would run a oil of thr same weight, whether it be 2 cycle or other. Other meaning straight weight 4 cycle oil. SAE #30 or #40. However make sure it is non detergent oil, as the additives in say a 10w30 will cause deposits over time. 2 cycle tc-w3 oil is nice in that it has additives made for outboards and has dye in it so you know it has oil mixed. I run Non-detergent #30 in my small 2 cycle engines with great results, but I rely on memory if I mixed in oil. Could be dangerous to bushings. Also if you run ND oil shake the can as it can separate ffom the gas.

    RICHARD A. WHITE
    RICHARD A. WHITE

    US Member - 2 Years
    Replies: 1771
    Topics: 137
    #236476

    I would think a single coil with dual output, similar to what the Elto Service twins used…Not sure how they were run originally
    Someone will chime in…beautiful outboard

    http://www.richardsoutboardtools.com
    classicomctools@gmail.com

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    lyks2tinkr

    US Member - 2 Years
    Replies: 339
    Topics: 40
    #236503

    One of theses days I have to get my 1916 Koban with underwater exhaust finished.
    You use a dual output buzz coil to run them.

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