1955 Evinrude 7.5 Tiller – Lower Unit Springs

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    Trainwreckbob


    Replies: 2
    Topics: 1
    #210494

    I am restoring/rebuilding a 1955 Evinrude 7.5. that has sat behind my furnace for about 20 years. There are four substantial springs about 1-3/4″ long and 1 1/4″ diameter. Two springs are installed at the tiller and two more for the lower unit. One pair uses a 0.168 inch coil and the other uses 0.205 inch coils.

    I though they were all the same size until I cleaned them – which springs go on the tiller and which springs go on the lower unit.

    Thanks!

    frankr
    frankr


    Replies: 5216
    Topics: 48
    #210499

    Is it physically possible to put them in the wrong position? I’m thinking the stronger ones go down below, but hate to say.

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    Trainwreckbob


    Replies: 2
    Topics: 1
    #210506

    I think you are correct – logically I would think the bottom springs should be more robust than the tiller springs – but I’ve been wrong before!

    The spring dimensions are identical except for the wire size. I am sure someone has run into this issue before.

    frankr
    frankr


    Replies: 5216
    Topics: 48
    #210514

    If you can trust the picture (yea, right), it looks like the upper ones are thinner. But for some reason, I kind of think the wire size makes the I.D. / O.D. such that they wont go over the retainers #44. Not?????

    7.5

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    bobw
    bobw

    US Member - 1 Year
    Replies: 1065
    Topics: 41
    #210521

    Not exactly the same motor but on my ’54 5.5hp, the lower springs are definitely the larger size. Wouldn’t think the 7.5 would be any different.

    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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    aquasonic

    US Member - 2 Years
    Replies: 391
    Topics: 32
    #210523

    I have an entire mid-section from the same motor that I had taken apart, painted, and reassembled not too long ago. As Frank wrote, the smaller gauge springs go up top. The mounts are keyed, so you need to make sure they are oriented to the keyway in the casting.

    Once the lower mounts are in, I used a ratchet strap to compress them in order to attach #42 the stainless steel retainer strap on the outside.

    • This reply was modified 3 days, 2 hours ago by Avataraquasonic.
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    Trainwreckbob


    Replies: 2
    Topics: 1
    #210528

    Thanks Frank, Bob and Aquasonic for all your help – This is just the advice I needed. I will install the bigger springs in the lower unit and the the smaller springs on the tiller. Wish me luck!

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