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flapper valve in exhaust?

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  • flapper valve in exhaust?

    I have a 99 Volvo 5.0GL. I removed my exhaust bellows and found a set of flapper valves mounted on a shaft inside each of the exhaust pipes below the elbows. One was melted and the other one has melted off and fallen down. I have looked on the volvo parts breakdowns and I cannot find the flapper valves. Anyone have any thoughts on this?
    Portsmouth, VA
    1999 Wellcraft 200S, Volvo 5.0GL (changed to NEW GM 5.7) SX-M
    "A boat is a hole in the water into which you throw money." I have thrown my share and am really enjoying it!


  • #2
    Re: flapper valve in exhaust?

    The flappers were eliminated, here is the service bulletin on their elimination.
    Don S.

    sigpic

    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

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    • #3
      Re: flapper valve in exhaust?

      volvo has discontinued them, but the omc flapper valves cross over and fit perfectly.I just replaced the manifolds and flappers on my 4.3 gls with sx drives.the flapper is:omc765166,pin omc913663,bushings omc3855517.

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      • #4
        Re: flapper valve in exhaust?

        Originally posted by carter72 View Post
        volvo has discontinued them, but the omc flapper valves cross over and fit perfectly.I just replaced the manifolds and flappers on my 4.3 gls with sx drives.the flapper is:omc765166,pin omc913663,bushings omc3855517.
        2 year old thread guy, the red banner at the bottom should have told you this...
        Please read this;
        http://forums.iboats.com/forum-rules...es-397820.html

        1976 Rogers Custom Boats 18' "Bonneville" W/ Chevy 454/ Berkeley 12JC

        Care Taker of 1976 Glastron V-184 Crestflight W/ Volvo 170B/280 I.O.
        & 1969 Starcraft W/ 1956 Evinrude 7.5hp Fleetwin.

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