Official 390 E.C. Thread

Discussion in 'Classic Sea Rays' started by electricaldoctor, May 19, 2009.

  1. DougLas

    DougLas Member SILVER Sponsor

    436
    Dec 13, 2008
    Lake Erie
    39 Express
    454
    Is anyone interested in buying a 1990 39 express with low hours. Hrs are under 700. Its my boat gas powered. A lot of upgrades. inside and out. looking at $42 thousand.
     
    Detroitexpress390 likes this.
  2. nickdcj7

    nickdcj7 Member

    233
    Jan 5, 2014
    Bass River, NJ
    1986 390 EC
    Twin 454 Mercruisers
    Your strainer gaskets are probably shot. they are either cork or rubber, and you can't switch according to perko. yours should be cork, but it's worth checking to be sure. the gasket kit is part # 0493dp799m from perko. The strainers are size 6. When you rebuild them, be very gentle with the plastic cylinders, they'll be brittle from age. Also, when you tighten the assembly up, be careful to not overtighten the nuts or the rods will shear off and you'll either be making new ones or paying out the wazoo for factory ones.
     
  3. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    He is talking about the seawater intake, not the sea strainer............

    The seacock is a 2 part assembly and if it is leaking around the flange on the floor, it is likely t hat the boat will need to be hauled out of the water and , given the age of t he parts, I'd replace the thru hull fitting and have the new one bedded in with 3M 5200.

    Here is an idea of how the assembly goes together:

    http://cdn.conbraco.com/apollovalves/literature/cat_MACA9000.pdf

    Look for "sea flange valve" for the pars inisde the boat and "one piece intake strainer" for the part outside.
     
  4. Detroitexpress390

    Detroitexpress390 New Member

    2
    Aug 1, 2017
    390 Express
    Twin Mercruiser 454's
    I might be. Waiting for a deal to close on my end and I'll be ready to buy. I'm in metro Detroit.

    Could I see some current pic's? And what's your location?
     
  5. DougLas

    DougLas Member SILVER Sponsor

    436
    Dec 13, 2008
    Lake Erie
    39 Express
    454
    I'll be back up to the boat this weekend will take current pics. Boat is located in Lake Erie Marblehead, Ohio.
    The fresh water tank has been repaired. laminate flooring in cabin and new carpeting. I built and installed the stainless steel trim tab as shown in this thread to keep the bow down when running. It has underwater lights green and white. A huge Polk Audio stereo system 4,000 wats. 10 6/5 s and 2 18 inch subs out back. with a Sony tuner Wi Fi and bluetooth.
    All upholstery out back has been replaced. Will have pics after this weekend.
     
    Detroitexpress390 likes this.
  6. Detroitexpress390

    Detroitexpress390 New Member

    2
    Aug 1, 2017
    390 Express
    Twin Mercruiser 454's

    Ever have a chance to take pics?
     
  7. DougLas

    DougLas Member SILVER Sponsor

    436
    Dec 13, 2008
    Lake Erie
    39 Express
    454
    Detroit message me your e mail Ill send pics
     
    Detroitexpress390 likes this.
  8. extractedenergy

    extractedenergy New Member

    3
    Nov 4, 2014
    Fishkill, NY
    now comes survey and hopefully purchase. Has working radar, gps plotting, autopilot, several engines
    gasoline
    would you happen to have the exact dimensions of the water tank on a 1988 390 EC? also where do you get plastic replacements?.
     

Share This Page

Show Sidebar