Generator Removal from a 390 EC

Discussion in 'Classic Sea Rays' started by Dave4562, Feb 10, 2020.

  1. Dave4562

    Dave4562 Member

    33
    Nov 10, 2019
    86 390 express cruiser
    454 Crusaders
    I have a 390 EC and it has an old Westerbeke 8kw and I am looking to removing it to put in a newer more efficient generator and system.
    the old generator has issues also.
    Wondering how much of a problem it is to remove?
     
  2. hottoddie

    hottoddie Well-Known Member

    Jan 11, 2012
    Boston/Cape Cod
    1986 Sea Ray 390 EC
    Garmin 4212 Chartplotter
    Garmin 24 HD Radar
    Garmin 546s Plotter
    454 Crusaders
    I have same boat with same generator. I have not had to remove it but it appears it can be removed fairly easily. 1- remove all of the batteries and battery boxes. 2- remove the wooden cross support between the stringers. 3-you may have to remove a few fuel lines/battery cables. 4-disconnect all of the fuel lines, cables and hoses from the generator, slide it forward under the main engine hatch. 5-lift generator straight up to remove. You may need to construct a gantry with a chain hoist to assist in removal.

    This can be a DIY project if you are handy but can be expensive if you have to pay mechanics $125/hr. FWIW I would consider getting the existing unit running in place. You don't describe what the "issues" you have with current 8kw unit.
     
  3. Dave4562

    Dave4562 Member

    33
    Nov 10, 2019
    86 390 express cruiser
    454 Crusaders
    It does not put out a steady current so I need to have it rewound or do a newer way.
     
  4. PlayDate

    PlayDate Well-Known Member

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    I can't imagine doing that job without using a travel lift crane. The generator is 450lbs. I could see doing it in a travel lift well if the boat was still in the water. It isn't hard to get the old one out and put the new one in. All the time is spent disconnecting and reconnecting the wiring and hoses.

    You definitely don't want to drop the old one or the new one.;)
     
  5. electricaldoctor

    electricaldoctor Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    May 14, 2008
    Thousand Islands, Rockport, Ontario.
    1988 390 EC
    454 Mercruiser Gassers
    What do you mean by a steady current? is it "hunting" all the time? if so, it sounds like a simple governor adjustment.
     
  6. hottoddie

    hottoddie Well-Known Member

    Jan 11, 2012
    Boston/Cape Cod
    1986 Sea Ray 390 EC
    Garmin 4212 Chartplotter
    Garmin 24 HD Radar
    Garmin 546s Plotter
    454 Crusaders
    The generator may or may not need to be rewound. Capacitors and diodes can cause your issues and are cheap and fairly easy to replace. As electrical doctor stated the governor can cause it the "hunt" as well. Who has condemned the generator in the first place. You will be spending many "boat bucks" and it may not be necessary. My WB 8k generator is also original to the boat and runs smooth and quiet. 8k is more than the boat needs and it would be better off with a 6.5k.
     

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