[Question] Install exhaust diverter on a jet?
+ Reply to Thread
Results 1 to 13 of 13

Thread:
Install exhaust diverter on a jet?

  1. #1
    Junior Member dstocker's Avatar
    Join Date
    Sep 2012
    Location
    Roseville
    Posts
    5

    Default Install exhaust diverter on a jet?

    I have a 86 Bahner 21' with a Berkeley jet and BBC 454. Just got the engine back from a rebuild and would like to install an exhaust diverter system while I'm putting it back in. I like to hear my radio when I'm idling around the marina. The above the water line transom exhaust is pretty loud.

    I purchased some used, solenoid actuated, exhaust diverter valves that are kind of a Y configuration. Coming off my logs and snails is a 4" exhaust hose that heads out the back transom above the water line to the exhaust tips with flaps. I have enough room to splice in the diverters and run a 3" hose below the boat but I'm concerned about that and don't want my boat on the bottom of the river or blow my motor by pumping it full of water. Also wondering what tips to use if this isn't a stupid idea. Something about drilling 3" holes in the bottom of the boat doesn't feel right.

    Is this a bad idea? Anyone have any experience with this?

    Don

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Member smupser's Avatar
    Join Date
    Apr 2011
    Posts
    64

    Default

    You can get exhaust tips with internal flappers to keep the water out below the water line. I've never heard of anyone doing this and sounds like alot of work for just trying to make their boat quieter. My 2 cents: look into some baffles that slip into your exhaust tips or install a louder stereo LOL

  4. #3
    Senior Member stc315's Avatar
    Join Date
    Oct 2008
    Location
    Yuma, AZ
    Posts
    606

    Default

    You can replace tips with marine mufflers.

    Sent from my SCH-I545 using Tapatalk 4
    Too much horsepower is almost enough!!!


    My boat is fast.....on Craiglist or EBay.


    I've been 340mph+ with a boat........In the back of a C130!

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member Mohavekid's Avatar
    Join Date
    Jan 2008
    Location
    Penn Valley, The Sierra Foothills
    Posts
    148

    Default

    Check out some of the aluminum jet fishing boats.

    Some of those have turned down exhaust ports that direct the exhaust below the surface. They are very quiet at idle.

  7. #5
    Senior Member 67weiman's Avatar
    Join Date
    Dec 2007
    Location
    Surprise, AZ
    Posts
    985

    Default

    Sounds like a bad idea to me. Why not just lower your exhaust outlets you have now to below the water line at idle?

  8. #6
    Senior Member 67weiman's Avatar
    Join Date
    Dec 2007
    Location
    Surprise, AZ
    Posts
    985

    Default

    I misses the stereo part. What is a stereo? And furthermore, what does said object do?

  9. #7
    Senior Member SBS933's Avatar
    Join Date
    Jun 2012
    Location
    Socialist Republic of California / Parker Az.
    Posts
    975

    Default

    Damn, most guys would like to get their tips out of the water and you wanna get em in.
    Believe Nothing you hear and 1/2 of what you see.

  10. #8
    Senior Member DuaneHTP's Avatar
    Join Date
    Dec 2007
    Location
    Shell Knob, MO
    Posts
    1,379

    Default

    Don't do it. The vibrations from the exhaust coming out under the boat will be so bad and loud that you won't hear the stereo anyway. Bad Idea! Have seen it done with poor results.

  11. #9
    Member
    Join Date
    May 2009
    Location
    Colorado Springs, Co.
    Posts
    74

    Default

    I've seen the tips extended downward so they're below the water line off-plane. On-plane they're above the water line.

    My CV23 has factory below the water line tips off-plane. Sort-of a passive switchable exhaust. Don't do it. If you would lose cooling water for some reason and burned through an exhaust hose, she's going down. Unless your bilge pump can handle the amount of water pouring in from a 3"+ hose.
    1978 Glastron/Carlson CV23; 429, Berk jet.

  12. #10
    Junior Member Jetinator's Avatar
    Join Date
    Aug 2011
    Location
    Corona,Ca
    Posts
    24

    Default

    Bad idea.

  13. #11
    21 Daytona Outlaw's Avatar
    Join Date
    Dec 2007
    Location
    Artesia, N.M.
    Posts
    5,291

    Default

    Get a louder stereo
    #55

  14. #12
    Head Janitor FormulaZR's Avatar
    Join Date
    Jul 2010
    Location
    Lubbock, TX
    Posts
    690

    Default

    I see what you're getting at, and I wanted to do something similar. Have one set of tips that are un-muffled and loud with another set that had mufflers. Ultimately, there is not really a cost effective or reliable way of doing this if you have water flowing through your exhaust.

    I wound up with a set of Gibson mufflers that work well. You might could do clamp on mufflers, and almost accomplish what you want.


    "No, my boat doesn't need any more power" - No one ever

  15. #13
    Senior Member H20MOFO's Avatar
    Join Date
    Dec 2007
    Posts
    4,288

    Default

    Quote Originally Posted by Outlaw View Post
    Get a louder stereo
    Fwiw.....when I had tt bassett's....the tips were about half in and half out of the water at idle. It was much quieter at idle than my ot's
    Another Hot Boat refugee

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in


Tags for this Thread

Digg This Thread

Posting Permissions

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95