Air Conditioner

Discussion in 'Sport Boats' started by Glenn13, Jul 5, 2019.

  1. Glenn13

    Glenn13 New Member

    Jul 5, 2019
    1998 SeaRay Sundancer 27O
    454 Mercruiser with Bravo III drive
    I am brand new to power boating and just bought a 1998 SeaRay Sundancer 27O. When I turn on the air conditioner I see water flowing from a starboard side port. Is this normal? I don't want to burn anything out. Is this water coming from the onboard water system? Sorry for my ignorance.
  2. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Dickson, TN / Chattanooga, TN
    1998 290 Sundancer
    Twin EFI 5.0L w/Alphas
    Kohler 4kW
    You are good. The system uses raw water to cool the unit while in use.

    But on a side note please get to know your boat from tip to tail .... it will make your boating experience much better.

    Glenn where are you located?

    If needed I bet someone close to you can give you a good walk down of your boat.
  3. Golfman25

    Golfman25 Active Member

    Sep 12, 2009
    Agree with Ducky. Trace your AC water line back to the intake. Know where the valve shut off is. Know where the pump is. Know where the strainer is. So you can address as needed.

    Do the same with the other systems. Good luck.
  4. Boat Guy

    Boat Guy Well-Known Member

    The time to be concerned is when you don't see a good flow of raw-water from the thru-hull.

    Your A/C system has no fan to run air through and remove heat. So the system uses raw-water from a thru-hull in the bildge to a seacock, up to a strainer, to a pump, which circulates the water through the system and out the side of the boat.
  5. Ariemoller

    Ariemoller New Member

    Feb 11, 2016
    Jersey City
    1988 Sea Ray Express Cruiser
    2xMercruiser 8.1l Horizon
    So silly question maybe. I have a Sea Ray 390 Express Cruiser. On my side there looks to be two discharges for the AC. One is flowing nicely the other a trickle. Should both be flowing?
  6. Golfman25

    Golfman25 Active Member

    Sep 12, 2009
    That size boat you might have two AC units. If they are both on, you should have good flow. Otherwise, you have a problem.
  7. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    Yes, both should be flowing at the same time. You have 2 independent AC units that share a single sea water pump. When one AC units starts (the compressor) it signals the water pump.

    A trickle sounds like a restriction in one of the lines. I'd check for an obvious hose pinch first.

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