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  1. #1
    Petty Officer 3rd Class codykoke's Avatar
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    Default 1956 Johnson fd-10 lower unit

    I am working on my friends fd-10 long shaft but at some point it was changed to a short shaft evinrude lower unit. My problem is I need a lower unit seal kit. Will the kit for an fd-11 fit.
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp

  2. #2
    Fleet Admiral HighTrim's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    It depends on the serial number. There was a mid year change in '57, prop shaft seal is a different size on the later '57's, they use the same seal as the '58 to 70s 18hp. So if the kit is for a '57 with serial number 7000 and down, it will work. If it is the seal kit for a '57 serial number 7000 and up, wont work. Actually the prop shaft seal will be the only different item, the rest will work.

  3. #3
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    Default Re: 1956 Johnson fd-10 lower unit

    You can go to ***************** and look up the parts and compare them, most likely they will use the same seal kit.

  4. #4
    Petty Officer 3rd Class codykoke's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Thanks guys. It happens that I only need the prop shaft seal but want a full kit. I will check the diagrams on marine engine but I'm not sure what year the lower unit is off of because it's not original.
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp

  5. #5
    Fleet Admiral HighTrim's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Ok then open her up.

    The earlier prop shaft seals will have a 0.625" Bore, 1.254"OD, 0.313" Width, Part number 302495

    The later prop shaft seals will have a 0.625" Bore, 1.128"OD, 0.25" Width, Part number 313284

    I can guarantee that they dont all use the same seal kit.

  6. #6
    Petty Officer 3rd Class codykoke's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Ok dumb question but how do I get that seal out of the bushing assembly thing
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp

  7. #7
    Captain 64osby's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Quote Originally Posted by HighTrim View Post
    Ok then open her up.

    The earlier prop shaft seals will have a 0.625" Bore, 1.254"OD, 0.313" Width, Part number 302495

    The later prop shaft seals will have a 0.625" Bore, 1.128"OD, 0.25" Width, Part number 313284

    I can guarantee that they dont all use the same seal kit.
    Are you sure about that!
    Despite the cost of Living, It's still a popular thing

    1973 Starcraft 21 mariner that's no longer for sale & 1963 14' Lone Star Big Fisherman Repairs

  8. #8
    Petty Officer 2nd Class oldybutagoody's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Very carefully. It's easy to ruin the prop head. Take your time, don't expect it to be easy. But it will come out. You can get a seal puller at Harbor freight
    http://www.harborfreight.com/catalog...?q=seal+puller
    Some people punch or drill a small hole, put a screw into the hole a few turns and pry out with a hammer. Careful with that prop head that the seal goes in, it's just aluminum and easily damaged. Once you get some of the seal out, sometimes a visegrip can finish the job. Did I mention to be careful with that prop head?
    Quote Originally Posted by codykoke View Post
    Ok dumb question but how do I get that seal out of the bushing assembly thing
    Current Engines:
    '57 18hp Fastwin
    '56 7.5hp Fleetwin
    '54 7.5hp Fleetwin

  9. #9
    Petty Officer 2nd Class oldybutagoody's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Quote Originally Posted by 64osby View Post
    Are you sure about that!
    Funny
    Current Engines:
    '57 18hp Fastwin
    '56 7.5hp Fleetwin
    '54 7.5hp Fleetwin

  10. #10
    Fleet Admiral HighTrim's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Quote Originally Posted by 64osby View Post
    Are you sure about that!
    I can guarantee it, what do you think?

  11. #11
    Petty Officer 3rd Class codykoke's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Today I was looking over the lower unit and found there is some up and down and around play on the prop shaft. Will a new prop shaft seal fix this or?
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp

  12. #12
    Vice Admiral 1946Zephyr's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    The best way to remove the seal:

    Take an 8d nail and grind the tip off to where the tip is flat. Set the prop seal housing over a socket that is slightly larger than the seal. Tap the seal out by driving the nail through the small holes on the outside of the seal housing.

    If you have up and down play, then something in there is severely worn.
    Vice Admiral Zephyr

    1941 Johnson HD-20 (in restoration)
    1947 Sea King 5hp
    1948 Evinrude Sportsman
    1949 Martin "40"
    1951 Evinrude Fastwin
    1954 Evinrude Fleetwin
    1955 Evinrude Fleetwin
    1955 Johnson JW-11
    1955 Johnson CD-12 (2)
    1955 Johnson QD-16
    1955 Johnson RD-17
    1957 Jhnson CD-14
    1957 Evinrude Big Twin
    1958 Evinrude Fisherman
    1958 Johnson FDE-12
    1959 Johnson RDSL-21B
    1974 Tanaka 1hp (screamin' drink mixer )

  13. #13
    Petty Officer 3rd Class codykoke's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Okay so I opened it up and the brass bushing has grooves in it as well as the prop shaft. Really pisses me off cuz the owner has a 150 dollar limit and I'm already there in parts. I was told it was a rebuilt lower unit but that's not the case. What would you guys do?
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp

  14. #14
    Petty Officer 3rd Class codykoke's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    After another look the side of the prop head that faces the prop is out of round. This piece looks like it is stainless not aluminum and possibly part of the seal, is the prop shaft seal rubber and metal or just rubber? Also zephyr the only hole in the thing is for the pin the line up with the lower unit side.
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp

  15. #15
    Captain 64osby's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Quote Originally Posted by HighTrim View Post
    I can guarantee it, what do you think?
    We'll see, if I ever see that other seal, it will be proof.
    Despite the cost of Living, It's still a popular thing

    1973 Starcraft 21 mariner that's no longer for sale & 1963 14' Lone Star Big Fisherman Repairs

  16. #16
    Captain 64osby's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Quote Originally Posted by codykoke View Post
    Okay so I opened it up and the brass bushing has grooves in it as well as the prop shaft. Really pisses me off cuz the owner has a 150 dollar limit and I'm already there in parts. I was told it was a rebuilt lower unit but that's not the case. What would you guys do?
    Quote Originally Posted by codykoke View Post
    After another look the side of the prop head that faces the prop is out of round. This piece looks like it is stainless not aluminum and possibly part of the seal, is the prop shaft seal rubber and metal or just rubber? Also zephyr the only hole in the thing is for the pin the line up with the lower unit side.
    Bushing and prop shaft are toast for your description. Sounds like your side job just went south unless you get the owner to belly up. The seal is metal and rubber.
    Despite the cost of Living, It's still a popular thing

    1973 Starcraft 21 mariner that's no longer for sale & 1963 14' Lone Star Big Fisherman Repairs

  17. #17
    Petty Officer 3rd Class codykoke's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Now I know this is bad business but the owner is a cheap bastard so do you think replacing the seal and filling with lubriplate will keep water out and grease in. The owner says he wil hardly use in anyhow
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp

  18. #18
    Rear Admiral
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    Default Re: 1956 Johnson fd-10 lower unit

    Well it's his motor, so do it that way...not the correct option but it works if he drains the unit every trip out and puts in fresh Lubriplate...you can also use corn head grease.

  19. #19
    Petty Officer 3rd Class codykoke's Avatar
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    Default Re: 1956 Johnson fd-10 lower unit

    Thanks to everyone who posted. I forgot I had a 1953 10 hp parts motor I was able to take the prop shaft and swap them and it worked perfect, no play and no leaks.
    1939 Sea King 3 hp
    1947 Sea King 3 hp
    2-1948 Johnson td-20 5 hp
    1954 Evinrude Fleetwin 7.5 hp
    1955 Evinrude Fastwin 15 hp
    1958 Johnson 18 hp
    1964 Mercury 110 9.8 hp
    1965 Sea King 6 hp
    1970 eska sportfisher 3.5 hp

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