New Years 'Mechanical' Resolution

Discussion in 'General Discussion' started by OllieC, Dec 29, 2017.

  1. OllieC

    OllieC Member SILVER Sponsor

    404
    Mar 11, 2013
    MinniSoCold
    2005 Weekender 215
    Mercruiser 5.0 mpi, Bravo III
    Fellow Sea Ray'ers,
    Happy New Year!

    For 2018 I've decided to do a couple of mechanical replacement/upgrades & wanted your opinion. I am looking at replacing the Water Pump & the Alternator.

    2005 5.0mpi with a Bravo 3.
    The water pump is original. I added a wear plate to it once I started losing suction & now the wear plate is starting to pit. I also believe the bearings are starting to wear. This is what I was considering; http://www.cpperformance.com/p-1681...6-mag-ho-82l-mag-and-502-mag-with-pulley.aspx Someone told me that going stainless wasn't a good idea, but I boat in fresh water????

    For the Alternator, should I go larger than stock? I have no idea where to start.

    Thanks for the help.
    Ollie
     
  2. Little Ducky

    Little Ducky Active Member

    515
    Jun 5, 2017
    Chattanooga TN/Dickson TN
    1998 SeaRay 290 Sundancer
    Twin 5.0L w/Alpha 1 drives
    Is your alternator dying? Bearings going out? Rattling?

    I would just go with stock.
     
  3. rpasquarello

    rpasquarello Member

    435
    Dec 8, 2010
    Long Island (Suffolk County)
    2010 240DA,GPSMAP441,Camper Pkg,AC/Heat,Eclipse DSC GX1000S, Ext. Swim Platform, Neutra Salt System
    MerCruiser 5.0L MPI ECT w/Bravo 1 sterndrive standard engine (260 hp - 194kW)
    OllieC likes this.
  4. northern

    northern Well-Known Member

    Jan 17, 2007
    West coast Vancouver to Alaska
    380 Aft Cabin 1989 GPS and Charts by Nobeltec
    Twin 454 strait shaft
    Find the wire size on your alternator it will set the maximum size alternator you can replace it with. We went from 55AMP to 70AMP. If you go over 100AMP your present belts will probably need to be upgraded or they will fail.
    For wire size check the net for max AMPs they will handle. It is function of AMPs and wire length. A real electrician can help. That is what I used.
     
  5. HUMPH

    HUMPH Active Member PLATINUM Sponsor

    Nov 4, 2009
    SF BAY AREA
    2003 410DA,
    2004 C14 Caribe
    CAT 3126TA's 350HP/
    50HP Honda
    It’s a simple voltage drop calculation. Just remember that the lower the voltage (12v for your alternator output), the more voltage drop is a concern. I would recommend that you verify the wire size, verify the length, then size the alternator conservatively. No need to heat up that wire!
     
  6. OllieC

    OllieC Member SILVER Sponsor

    404
    Mar 11, 2013
    MinniSoCold
    2005 Weekender 215
    Mercruiser 5.0 mpi, Bravo III
    No, but I did notice at the end of last season when I started it up, it was under 10 and wouldn't reach 13.5v for a few minutes. I have a dual battery setup and always run the house batt for anchorage activities.

    If I recall correctly, when I use to fire it up, it went right to maximum 13.5v
     
  7. OllieC

    OllieC Member SILVER Sponsor

    404
    Mar 11, 2013
    MinniSoCold
    2005 Weekender 215
    Mercruiser 5.0 mpi, Bravo III
  8. OllieC

    OllieC Member SILVER Sponsor

    404
    Mar 11, 2013
    MinniSoCold
    2005 Weekender 215
    Mercruiser 5.0 mpi, Bravo III
    Mine stock is a 69amp (70 amp)
     
  9. hottoddie

    hottoddie Member

    959
    Jan 11, 2012
    Boston/Cape Cod
    1986 Sea Ray 390 Express
    Garmin 4212 Chartplotter
    Garmin 24 HD Radar
    Garmin GSD 22 Sounder
    Garm
    454 Crusaders
    70 amp on a boat your size should be plenty. Just make sure the batteries are good and properly maintained.
     
  10. mnm99

    mnm99 Member SILVER Sponsor

    993
    Oct 2, 2015
    Long Island
    2004 340 SeaRay Sundancer
    Twin 8.1 Merc
    OllieC likes this.
  11. OllieC

    OllieC Member SILVER Sponsor

    404
    Mar 11, 2013
    MinniSoCold
    2005 Weekender 215
    Mercruiser 5.0 mpi, Bravo III
    I notice you have no issue with the stock mounting bracket. That was a concern. I added a wear plate to my existing pump which made it longer. Whenever I replace the impeller, its a chore to get the mounting bracket back on. It's actually more difficult than replacing the impeller itself.
     
  12. knot at work

    knot at work New Member

    15
    Sep 6, 2014
    Virginia Beach, va
    2001 460 Sundancer, 430 Cummins, RL80, VHF220, Sat tv, 10kw Westerbeke.
    430 Cummins
    Just have the alternator rebuilt. Don't waste money on a new one unless you have a major issue.
     
  13. mnm99

    mnm99 Member SILVER Sponsor

    993
    Oct 2, 2015
    Long Island
    2004 340 SeaRay Sundancer
    Twin 8.1 Merc
    They make them to compensate so the bracket fits. No problems at all.
     
    OllieC likes this.

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