User Tag List

Results 1 to 8 of 8
  1. #1
    Join Date
    Apr 2018
    Location
    Missouri
    Posts
    27
    Thanks (Given)
    19
    Thanks (Received)
    0
    Likes (Given)
    7
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    xr6 Lower unit change

    I have a '92 150 xr6 S/N-0D137211. According my research the lower unit is a 4 1/4 inch diameter gearcase with a 1.87 gear ratio. Will a 4 3/4" gearcase fit this motor and will there be any performance difference?
    Thanks

  2. #2
    Join Date
    Apr 2001
    Location
    Michigan
    Posts
    13,701
    Thanks (Given)
    96
    Thanks (Received)
    265
    Likes (Given)
    4619
    Likes (Received)
    2488
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)
    Small cases have a 1.78 ratio. You may need to reprop or buy the filler ring for your prophub to close off the exhaust

  3. Thanks Iron Horse thanked for this post
    Likes tlwjkw, Iron Horse liked this post
  4. #3
    Join Date
    Jan 2002
    Location
    TX......somewhere?
    Posts
    5,048
    Thanks (Given)
    3
    Thanks (Received)
    138
    Likes (Given)
    56
    Likes (Received)
    391
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    https://bobsmachine.com/product/blow-out-ring/

    maybe/maybe not?.. try it without first.. its gonna ventilate but sometimes that's a good thing.. depends on purpose and your overall rig...

  5. Thanks Iron Horse thanked for this post
    Likes Iron Horse liked this post
  6. #4
    Join Date
    Sep 2001
    Location
    shreveport,la
    Posts
    5,548
    Thanks (Given)
    5
    Thanks (Received)
    70
    Likes (Given)
    78
    Likes (Received)
    601
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Depending on your application, the larger case with a 1.87 may be better
    Erik Kiser

  7. Thanks Iron Horse thanked for this post
    Likes Iron Horse liked this post
  8. #5
    Join Date
    Apr 2018
    Location
    Missouri
    Posts
    27
    Thanks (Given)
    19
    Thanks (Received)
    0
    Likes (Given)
    7
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the info guys. Re-propping is a definite as it was over propped when I bought it. Any recommendations on where to get a good reman lower unit at a fair price? Also looking at props but there is a ton of different ones out there. Prop will be going on a Ranger451V. Length 17.5 ft. 84'beam Speed is not the #1 priority but looking for a good balance between hole shot and top end. Any recommendations on props to consider would be appreciated.

  9. #6
    Join Date
    Sep 2017
    Location
    Ashland city tn
    Posts
    2,381
    Thanks (Given)
    90
    Thanks (Received)
    167
    Likes (Given)
    364
    Likes (Received)
    383
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Prolly trophy or similar for a good starting point

  10. Thanks Iron Horse thanked for this post
    Likes Iron Horse liked this post
  11. #7
    Join Date
    Apr 2018
    Location
    Missouri
    Posts
    27
    Thanks (Given)
    19
    Thanks (Received)
    0
    Likes (Given)
    7
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks Merc
    You are the second one to recommend a Trophy, so I am going to try to find one to test.

  12. #8
    Join Date
    Jan 2002
    Location
    TX......somewhere?
    Posts
    5,048
    Thanks (Given)
    3
    Thanks (Received)
    138
    Likes (Given)
    56
    Likes (Received)
    391
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    if ya go to a bigger case try a tempest also if ya run across one..... kinda scarce but work good on some rangers..

  13. Thanks Iron Horse thanked for this post
    Likes Iron Horse liked this post

Similar Threads

  1. 3.0 liter Lower unit design change?
    By 2.5-21 in forum Technical Discussion
    Replies: 2
    Last Post: 02-14-2018, 08:59 AM
  2. Lower Unit Change
    By Blazer95 in forum Technical Discussion
    Replies: 0
    Last Post: 06-19-2010, 11:11 AM
  3. OMC lower unit change?
    By drjerry1st in forum Technical Discussion
    Replies: 5
    Last Post: 04-19-2010, 12:28 PM
  4. Change, My Lower Unit
    By MIJI in forum The Scream And Fly Lounge
    Replies: 6
    Last Post: 11-16-2008, 12:39 PM
  5. Lower Unit Fluid Change
    By fantastixvoyage in forum Technical Discussion
    Replies: 3
    Last Post: 07-03-2003, 09:54 PM

Posting Permissions

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