Thanks Thanks:  0
Likes Likes:  0
Results 1 to 4 of 4

Thread: 1983 70hp mercury help

  1. #1
    Team Member
    Join Date
    Dec 2010
    Location
    NW Arkansas
    Posts
    21
    Post Thanks / Like

    Default 1983 70hp mercury help

    I installed a 4 cylinder 50hp on a short shaft mid, just not enough. I have a 70hp merc I'm going to rebuild and install on the mid for my new 1552weldbilt semi v jon. Is there any mods that won't affect torque. I plan on running a jet pump on this motor besides the prop lower. Also, I'm thinking about using a new style transom bracket and swivel. Has anyone modified a long shaft swivel bracket to use with a short mid section. I want the newer style because the TnT unit is much smaller and lighter than the older twin ram setup. Lighter is always better!

  2. #2
    Team Member
    Join Date
    Jun 2005
    Location
    Eastern PA
    Posts
    661
    Post Thanks / Like

    Default

    I've done three Merc triples mounted on Mark 55 type towers (one with external reeds). The combination works very well and is pretty light: 150 complete with FG Shift.

    Let me know if I can be of assistance.

    Jeff

  3. #3
    Team Member
    Join Date
    Dec 2010
    Location
    NW Arkansas
    Posts
    21
    Post Thanks / Like

    Default

    I have alot of tools but are there any special tools I'll need to disassemble and reassemble the powerhead? I know I'll need a flywheel puller .

  4. #4
    Team Member mercmack's Avatar
    Join Date
    Dec 2004
    Location
    cedar city,Ut
    Posts
    80
    Post Thanks / Like

    Default

    You will need one set of the Merc ring compressors..thats a must..best place to find some is on Ebay..

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. my 1983 Krier with 55h mod
    By Randy Aveline in forum Boat Racing Encyclopedia
    Replies: 9
    Last Post: 06-17-2011, 02:36 PM
  2. my 1983 Krier
    By Randy Aveline in forum Boat Racing Encyclopedia
    Replies: 2
    Last Post: 10-29-2009, 05:09 PM
  3. 1983 St. Louis
    By Ted March in forum Outboard Racing History
    Replies: 21
    Last Post: 06-01-2006, 06:24 PM
  4. St. Louis 1983 Mod VP
    By Ted March in forum Outboard Racing History
    Replies: 36
    Last Post: 11-08-2005, 09:13 AM

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
  •