Thanks Thanks:  0
Results 1 to 6 of 6

Thread: needing help with a 50HP Johnson

  1. #1
    Team Member
    Join Date
    Jun 2019
    Posts
    2
    Post Thanks / Like

    Default needing help with a 50HP Johnson

    hey y'all,

    names zack, i was directed to yall for some help trying to breath new life into my motor so here we go...

    i have a 72 johnson 50hp 2 cyl, i am trying to find a rebuild kit for it, but anything i have found is for 81 and up.

    now here is the deal, it is currently running, with a little trouble to get going, but once she is warm she'll eat. i would like to keep her running but if i cannot get a rebuild kit, im not sinking money in the motor. BUT i have been told i can swap the powerhead and to look for 80-88 powerhead. secondly, i have been told that i can swap over some 60hp carbs to get some more out of her as well.....

    so here is where i am at, if i can get an actual '72 50hp rebuild kit, where is it lol and if i am better with power head swap, what years should i look at.

    thanks for your help yall.

    zack.

  2. #2
    Team Member
    Join Date
    Sep 2008
    Location
    Singapore/Melbourne/Italy
    Posts
    780
    Post Thanks / Like

    Default

    72 has old electric shift lower unit, I would imagine very hard to find parts
    I would have thought the powerhead rebuild parts are still available?
    If you can move up to a later engine 1980+ they are a better base product
    Likes Scherfz1 liked this post

  3. #3
    Team Member
    Join Date
    Jun 2019
    Posts
    2
    Post Thanks / Like

    Default

    The lower is good, not one issue, but I wouldn’t mind slapping on a 55-60hp power head that is 80 or newer, just don’t know what years I should look at, for instance I have found an 82 Evinrude 55 hp power head that seems to be good bones but all of the rebuild kits I come across go by this 3.187 bore and I have no idea as to what 80’s motors has this bore

  4. #4
    Team Member
    Join Date
    Sep 2008
    Location
    Singapore/Melbourne/Italy
    Posts
    780
    Post Thanks / Like

    Default

    The bore has never changed, pistons and rods got better over the years. In the 70's
    They are a great engine
    The sst45 is just a 60hp with a different exhaust and shaved head, 60hp sleeve so same porting
    The driveshaft splines in the crank changed in the 80's so you need to check they match your shaft.
    Not 100% sure the powerhead will fit, i'm just thinking about the clearance for shift linkage which is cast into the crankcase front?
    I guess that depends on how much of the later engine you get, cowls etc and if they will fit

  5. #5
    Team Member
    Join Date
    Jun 2019
    Posts
    14
    Post Thanks / Like

    Default

    Hey Scherfz, glad to see you made it over.


    I have been reading here quite a bit lately but this may be my first post. The engine gurus here speak in terms of Cubic inches of the different blocks due to racing classes and whatno,t so if your going to do research (Via search) here you may want to figure out what "They" call your motor.

    Pretty sure my 25hp evinrude is considered a 32CI or 31.8 engine for example.

    Like in this thread.

    http://www.boatracingfacts.com/forum...8ci-Mod-Advice

  6. #6
    Team Member DeanFHobart's Avatar
    Join Date
    Feb 2005
    Location
    Lake Sammamish, Washington and Indio, California
    Posts
    189
    Post Thanks / Like

    Default

    Zack,

    Try Sea Way Marine... 425-412-4006.... ask for Dave Losvar... his direct number is: 425-412-5914. They specialize in all old outboard motors and parts. They should be able to help you.
    Dean Hobart

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •