Results 1 to 9 of 9
  1. #1
    Yanksfan's Avatar
    Join Date
    Apr 2012
    Location
    Miami
    Posts
    440
    +1
    19

    Installed Riva Thru Hull Exhaust on a GTX 185, But have a question on the coonections

    Hi All,
    While I wait for my rebuilt SC, I decided to install a Thru Hull, all is good hole done and I will put the pipe tomorrow but riva instructions are vague, I am just wondering if I need to go buy something else to get this finished? or I just need to install the hoses as they were and use the block off on the new pipe? see someones else pict below,

    I guess the question is which water line am i disconnecting for this if any?


    any and all tips are appreciated and thanks in advance.


  2. #2
    Banned User
    Join Date
    Dec 2006
    Location
    Crest Hill, IL
    Posts
    9,512
    +1
    215
    That line that is being T'd off should be run to the end of the Riva pipe you installed, there is a bung attachment for the water line...

    And try to reduce it to a single T fitting, and no shut off valve needed....

  3. #3
    Yanksfan's Avatar
    Join Date
    Apr 2012
    Location
    Miami
    Posts
    440
    +1
    19
    So I need to go buy a T, any idea on the size? Abd what is the block off nut for then?

    thanks

  4. #4
    Banned User
    Join Date
    Dec 2006
    Location
    Crest Hill, IL
    Posts
    9,512
    +1
    215
    I just looked at the picture again, and I got some questions...

    - Why are there 2 V-band clamps connecting the Exhaust manifold and Jpipe together? is there an Extender mounted in there?
    - You say its a 185hp GTX, but what year? The exhaust system changed from 2003 to 2004/5...
    - Can you provide another picture of the entire exhaust system?
    - How come you are able to take that first picture with so much room around the motor? Is the top deck off the hull?

    You have a lot of clamps on that exhaust system, you don't need that many...

    A T fitting that will match the current hose on the bottom of the manifold/jpipe assemble...Can be brass of plastic from any home improvement store...

  5. #5
    Sturm215's Avatar
    Join Date
    May 2010
    Location
    Lakeland florida
    Posts
    1,893
    +1
    64
    He said it's someone's pic he was referring to

  6. #6
    Yanksfan's Avatar
    Join Date
    Apr 2012
    Location
    Miami
    Posts
    440
    +1
    19
    Thats not mine, I have a 04, basically only one hose I see is the one that goes to the JPipe, thats all I had before taking out the oem exhaust baffle

  7. #7
    Banned User
    Join Date
    Dec 2006
    Location
    Crest Hill, IL
    Posts
    9,512
    +1
    215
    Quote Originally Posted by Sturm215 View Post
    He said it's someone's pic he was referring to
    DOH! Thats what I get for skimming the question...


    Quote Originally Posted by Yanksfan View Post
    ...install the hoses as they were and use the block off on the new pipe?
    ...I guess the question is which water line am i disconnecting for this if any?

    Hook the water lines back up the same way they were when you took them off...

    Top of manifold goes to top of Jpipe, just a few inches away...

    Bottom of manifold goes to bottom of Jpipe, just a few inches away...

    That lower line should not have a T fitting on it, that only was on RXP's...

    If it had a T fitting on it, then that line runs to the end of the Riva exhaust pipe, and is connected at the water injection point...

    If there was not a T fitting installed, then there is no extra line, and the plug on the pipe simply gets plugged with a fitting....most likely a 1/8-27...

    Quote Originally Posted by Yanksfan View Post
    Abd what is the block off nut for then?
    The blockoff, is probably the fitting that goes in the pipe...


    On a side note, I would look into having the waterbox gutted. You will gain power and a deeper/louder exhaust note...

  8. +1 by:


  9. #8
    Yanksfan's Avatar
    Join Date
    Apr 2012
    Location
    Miami
    Posts
    440
    +1
    19
    Perfect thanks much bro... Im thinking about the water box I might just do it now tyat is out

  10. #9
    Banned User
    Join Date
    Dec 2006
    Location
    Crest Hill, IL
    Posts
    9,512
    +1
    215
    Quote Originally Posted by Yanksfan View Post
    Perfect thanks much bro... Im thinking about the water box I might just do it now tyat is out
    If its out, do it now...you will gain a lot more with it done.

    If the box is a standard unit from 04-07, then its simple....

    Cut the front of the box off (side that goes toward motor), best with a recipricating saw and a bi-metal blade...Do it at the weld seam, but not on the weld itself...

    With the end cap off, use the saw to chop off the outlet pipe inside the box. You can cut it off as flush as possible, and leave a little ridge if you want. If you want to spend some time blending it smooth, then go ahead...

    Get a 5" hole saw on a drill, and pop a hole in the center of the wall...If you do not have a 5" hole saw, or don't want to purchase one, then several small holes done to make one large hole can be done...You do not want to leave any shapr edges from multiple holes...

    Then have the cap welded back on, and welder can do it cheap...

    Here are some pics...

    Click image for larger version. 

Name:	waterbox_5inch.jpg 
Views:	547 
Size:	223.5 KB 
ID:	321116Click image for larger version. 

Name:	waterbox_outlet.jpg 
Views:	82 
Size:	38.3 KB 
ID:	321115

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Replies: 8
    Last Post: 08-30-2015, 02:40 PM
  2. Riva Thru Hull Exhaust on FZS SHO
    By Ski Hacks MG in forum Yamaha PWC Performance (4-stroke)
    Replies: 3
    Last Post: 02-01-2015, 09:19 PM
  3. Riva Thru Hull Exhaust Install - help
    By wolf513 in forum 4-Tec Performance
    Replies: 26
    Last Post: 08-29-2008, 09:32 PM
  4. Big news on the Riva Thru Hull Exhausts
    By Green Hulk in forum 4-Tec Performance
    Replies: 10
    Last Post: 09-27-2006, 03:05 AM
  5. Pics of Nils/Mark Thru Hull Exhaust on my GTX S/C LTD
    By Red Devil in forum 4-Tec Performance
    Replies: 26
    Last Post: 12-20-2005, 05:00 AM

Posting Permissions

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