1989 340SD: how big is your AC

Discussion in 'Classic Sea Rays' started by carboncow, May 23, 2016.

  1. carboncow

    carboncow Member

    55
    Jul 25, 2014
    Ohio
    1989 340 Sundancer & 2007 Sea Doo Challenge 180
    Mercruiser TbIV 454ci V-drive % Rotax 4stroke 215HP
    Boat new to me last summer, AC running but not compressing. Unit is OEM AIrrr and ancient. Thinking of just putting in new unit rather the Diagnosis and recharge.

    What do you have as a replacement? 12k, 14k or 15k?


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  2. SCORPIO

    SCORPIO Well-Known Member SILVER Sponsor

    Apr 7, 2008
    Delaware
    1989 300 DA
    Twin 5.7 Merc Alpha I
    Can't directly answer your question but you may want to give it a shot of gas if the unit runs, it may only be low on refrigerant. Those ancient units were built a lot tougher than the new units so don't be in a hurry to throw it away. A new one won't last 27 years I'd bet. Besides, a new one will run a few thousand bucks, a recharge could be as little as a couple hundred.
    Good luck, and let us know which route you go and if a new unit, how big.
    If I had to replace my ancient unit on my 300, I'd go a bit bigger than what I thought I need for a bit of 'cushion' for those really hot days or cold nights. Also, if you have the bridge boat in your pic, there is more area being cooled than on a Dancer so bigger would be good.
     
  3. topnote

    topnote New Member

    123
    Dec 21, 2012
    None
    None
    None
    Mine needed servicing and required freon but it works great now. Dont forget to prime the water inlet after winterization. I have a 1985 Dancer 34'
     
  4. Mike Blake

    Mike Blake Active Member

    Jan 27, 2012
    Yankeetown FL West coast
    89 340 Sundance all Raymarine.
    Gas hogs 454X2.
    6 Years ago I took the 12000 BTU out and installed a whole new 16000 BTU unit from ..http://www.flagshipmarine.com/ and if you call ask for Tom. A week ago I installed a Nest thermostat an that thing is way to cool.
     
  5. Pyrojodge

    Pyrojodge Well-Known Member TECHNICAL Contributor

    May 1, 2011
    Lake Erie Ohio
    1989 Sea Ray 340 DA
    twin 454 Mercs
    In the older 340 Sundancers they are 16000 BTU units. I would suggest that you have someone look at the refrigerant for you if it's not getting cold and the compressor is working. On this old dudes if the compressor hisses/ buzzes and pops the breaker then the unit is toast as the compressor is locked up. But if she runs that's what I would do. There's not very places in our area that will even look at marine ACs. For mine I use Marine Tech Concepts they are about the only reasonable local people. There are others but they've been huffing the gas way to long. If you really want to replace it search amazon. They have exact replacement units that are 16000 BTU and affordable.
     

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