User Tag List

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 6 of 6
  1. #1
    Join Date
    Apr 2015
    Location
    Wisconsin
    Posts
    2
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Mounting a 175EFI on a 200EFI mid with 200 tuner? Is it safe? Will I gain anything?

    So long story short, I have a 92 175efi, and I would like to swap it over to a 98 200efi mid and lower (it had an FF block original on this mid). I picked this up fairly cheap with the intentions of converting my Mariner into a Merc. My main concern is will I hurt the 175 powerhead if I just swap it over to the 200 mid and lower? I’m not too familiar with the porting and cooling side of the motors, or if the 200 exhaust tuner is gonna hurt me or not as well.

  2. #2
    Join Date
    Feb 2009
    Location
    Edgewater,B.C. CANADA
    Posts
    8,005
    Thanks (Given)
    140
    Thanks (Received)
    263
    Likes (Given)
    3002
    Likes (Received)
    1052
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It will work, doubt you will see huge gains maybe a bit.

    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

  3. #3
    Join Date
    Feb 2011
    Location
    HUDSON, FLORIDA
    Posts
    989
    Thanks (Given)
    253
    Thanks (Received)
    44
    Likes (Given)
    290
    Likes (Received)
    231
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Merc & mariner are the same, execpt color and decals. i dont think youll gain anything. most likely same tuner.

  4. #4
    Join Date
    Jul 2012
    Location
    Huntington, Texas
    Posts
    2,618
    Thanks (Given)
    285
    Thanks (Received)
    254
    Likes (Given)
    1747
    Likes (Received)
    1184
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    175 efi's usually have the long tuner that goes all the way to the bottom of the liner. It will breathe better with the 200 tuner!
    Josh Peterson

  5. #5
    Join Date
    Apr 2015
    Location
    Wisconsin
    Posts
    2
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by KIRCHNER View Post
    Merc & mariner are the same, execpt color and decals. i dont think youll gain anything. most likely same tuner.
    Yeah I know, my boat came with the Mariner and itís just looking old as the years go on. Scored a deal on an alien hood and lower cowls with the mid and gear case really cheap. So I figured instead of painting everything on my Mariner black to be a merc... why not just buy a base gasket and swap the power head over 🤷🏻*♂️.

  6. #6
    Join Date
    Jul 2012
    Location
    Huntington, Texas
    Posts
    2,618
    Thanks (Given)
    285
    Thanks (Received)
    254
    Likes (Given)
    1747
    Likes (Received)
    1184
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Whatever you like, I go out of my way to make sure most of my junk is Mariner gray. Everybody runs a Merc...
    Josh Peterson

  7. #7
    Join Date
    Feb 2011
    Location
    HUDSON, FLORIDA
    Posts
    989
    Thanks (Given)
    253
    Thanks (Received)
    44
    Likes (Given)
    290
    Likes (Received)
    231
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I think the mariner hi-po engines look awsome. Graphite grey/orange race cowls really cool.

Similar Threads

  1. Converting 150 efi to 175efi?
    By cmb1998 in forum Technical Discussion
    Replies: 6
    Last Post: 10-01-2015, 06:05 PM
  2. ditch long tuner,topend gain?
    By Hirk in forum Technical Discussion
    Replies: 7
    Last Post: 10-15-2014, 08:14 PM
  3. 175efi
    By greg88 in forum Technical Discussion
    Replies: 1
    Last Post: 09-08-2010, 08:31 PM
  4. Will a 200 tuner give me any gain on a xr4 150?
    By stlcheckmate in forum Technical Discussion
    Replies: 13
    Last Post: 05-16-2009, 06:42 AM
  5. Mercury Tech: XR-6 case!!!! how much horsepower is safe, what speed is safe????
    By bigtis in forum Technical Discussion
    Replies: 22
    Last Post: 03-02-2009, 06:53 PM

Tags for this Thread

Posting Permissions

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