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Heater install on a 2002 5.0 merc EFI

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  • Heater install on a 2002 5.0 merc EFI

    I have a 2002 Four Winns (5.0 merc EFI) I have a heater to install, but I do not know where to connect the
    supply & return water hoses to. Can any one help with a diagram??

    Thanks

  • #2
    Re: Heater install on a 2002 5.0 merc EFI

    Originally posted by Richard11153 View Post
    I have a 2002 Four Winns (5.0 merc EFI) I have a heater to install, but I do not know where to connect the
    supply & return water hoses to. Can any one help with a diagram??

    Thanks
    Supply is from the manifold return is on the side of the water pump on the block.

    http://forums.iboats.com/boat-topics...ck-595506.html
    2013 Bayliner 255CR
    5.0MPI S/N:2A044802
    http://seawenchnc.blogspot.com

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    • #3
      Re: Heater install on a 2002 5.0 merc EFI

      Here you go. I did a photo for you. Let me know if you get stuck. Click image for larger version

Name:	blockheater.jpg
Views:	1
Size:	128.3 KB
ID:	7102501
      2013 Bayliner 255CR
      5.0MPI S/N:2A044802
      http://seawenchnc.blogspot.com

      Comment


      • #4
        Re: Heater install on a 2002 5.0 merc EFI

        Originally posted by Richard11153 View Post
        I have a 2002 Four Winns (5.0 merc EFI) I have a heater to install, but I do not know where to connect the
        supply & return water hoses to. Can any one help with a diagram??

        Thanks
        Ayuh,.... Welcome Aboard,..... agallant80 has got ya headed the Right way, complete with pictures,....

        Hot water Outa the intake, behind the t-stat, 'n returned to a port on the circulatin' water pump housin',..

        You'll need a 1/2" pipe to hose barb in the diameter of the heater ports, so 2 fittin's total,...
        Common sizes are 1/2" pipe to 1/2" barb, 1/2" pipe to 5/8" barb, 'n 1/2" pipe to 3/4" barb,...
        Last edited by Bondo; March 3rd, 2014, 03:37 PM.

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        • #5
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          Re: Heater install on a 2002 5.0 merc EFI

          Thanks !

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