1957 Golden Javelin Wrist Pin Bearings replacements

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  • Michael Smith

    Canada Member - 1 Year
    Replies: 2
    Topics: 1
    #248477

    Rebuilding a 1957 35 hp Johnson Golden Javelin and need to replace the wrist pins and needle bearings.

    I have an expert machinist that builds race engines who can replace the needle bearing and wrist
    Pins with Bronze Inserts with stainless wrist pins.

    Is there any reason why Bronze inserts would not work in a 2 stroke motor?

    Mike


    frankr

    US Member - 1 Year
    Replies: 5919
    Topics: 49
    #248482

    Well, earlier motors such as 1955 25hp did have bronze bushings in the small end of the con rods. They wore badly, which was the reason they went to needle bearings. Yeah, to be fair, they had problems with the early needle bearings also.


    Mumbles

    Canada Member - 2 Years
    Replies: 5245
    Topics: 282
    #248483

    The pre ’61 ten horse motors were notorious for wrist pin bushing wear even on 24:1 mix and that’s why they went to needle bearings on the 61-63 motors. Sure, bronze bushings would work but they would probably wear out long before needle bearings would.

    https://www.ebay.com/itm/133853581546

    https://www.ebay.com/itm/312247689922


    bobw

    US Member - 1 Year
    Replies: 1592
    Topics: 48
    #248484

    Another option would be to obtain a pair of rods from the 1958 35hp, part #377272. These had a better single roller bearing as opposed to the 2 smaller bearings used on the ’57 model rods.

    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 1 month, 1 week ago by bobw.

    nj-boatbuilder57


    Replies: 284
    Topics: 41
    #248570

    Interesting…are the ’58 rods the exact same size as the ’57?


    frankr

    US Member - 1 Year
    Replies: 5919
    Topics: 49
    #248574

    con-rods

    Attachments:

    bobw

    US Member - 1 Year
    Replies: 1592
    Topics: 48
    #248578

    Yes, they are the same size and as noted in the table Frank provided, the 377272 rods can be used on the 30 and 35hp OMC motors from 1956 thru the late 1950’s including your ’57 Javelin. I just swapped a set of the ’58 rods into my ’56 30hp. See pic for comparison – note different wrist pin bearings.

    Edit – wrong 1958 part number posted in pic – should be 377272.

    New-and-Old-Con-Rod

    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 1 month, 1 week ago by bobw.
    • This reply was modified 1 month, 1 week ago by bobw.
    Attachments:

    Michael Smith

    Canada Member - 1 Year
    Replies: 2
    Topics: 1
    #250578

    Thank you!


    Michael Smith

    Canada Member - 1 Year
    Replies: 2
    Topics: 1
    #250579

    Thanks!

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