Water in oil...

Discussion in 'Gas Engines/Drives/Transmissions/Props' started by Glocker, Oct 2, 2019.

  1. Glocker

    Glocker Member

    36
    Sep 7, 2019
    Boat: 2000 Sea Ray 185
    Tow Vehicle: 1998 Ford Explorer Limited V8
    4.3 Mercruiser
    If you leave your drain plug out, and your boat takes on enough water to stall the motor, can it somehow get water into the oil; say through the pan gasket or oil filter? Engine in question is a 4.3 Mercruiser.
    Thank you!
     
  2. JimG

    JimG Well-Known Member SILVER Sponsor

    Nov 4, 2008
    Southern WV
    2007 310 DA
    Kohler 5ECD
    Twin 350 Mags
    Raw Water Cooled
    V-Drives
    Say it ain't so! Didn't we just talk about things like this in another thread?

    You would have to get water all the way up to the intake to get water into the cylinders.
     
    Glocker likes this.
  3. 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
    Water can enter thru the dipstick tube. They aren't very water tight.
     
    joeyleggz and Glocker like this.
  4. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    tell us the whole story from the beginning , what you have observed and things you have done to confirm this issue.
     
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  5. Glocker

    Glocker Member

    36
    Sep 7, 2019
    Boat: 2000 Sea Ray 185
    Tow Vehicle: 1998 Ford Explorer Limited V8
    4.3 Mercruiser
    While on an early test drive the owner left the drain plug out of the boat. I popped the engine cover to discover the engine pretty well submerged. The boat began stalling soon after and completely stalled while I was grabbing the owner's trailer to get on the ramp. We let it drain, and the boat started up and ran fine. After I bought it, I had an oil change and the mechanic saw some evidence of water in the oil. The mechanic said he doesn't believe I have a cracked block or a head issue.
     
  6. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    This could bite you in the ass if it went above the starter, electrically. Water in your oil probably isn't your biggest issue.
     
    Glocker likes this.
  7. Glocker

    Glocker Member

    36
    Sep 7, 2019
    Boat: 2000 Sea Ray 185
    Tow Vehicle: 1998 Ford Explorer Limited V8
    4.3 Mercruiser
    Everything is working great. I've been out three times now without any issues so far. The trim pump reservoir also had some signs of water mixed with the fluid but that has been vacuumed out and replaced with my oil change. I forgot that part of it.
     
    Jeff Delbuono likes this.
  8. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    Your good...maybe have to change out that starter if it went above it. You'll know it before it strands you.
     
    Glocker likes this.
  9. bobeast

    bobeast Dance the Tide SILVER Sponsor

    Oct 22, 2017
    Isleton, CA
    2002 310DA
    350 MPI w/V-drives
    Stalling out is a sure sign that something electrical got submerged. Doubtful water would get in through the oil pan unless you already had a leak there. It could get in through the carb (or throttle body), the exhaust, or through the dipstick.

    Be prepared for future electrical gremlins. (starter, distributer, sensors, relays, etc.) If it was salt water, even more so.
     
  10. 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
    I would change ALL the fluids...... run the boat for a few hours and then change all the fluids again at some point.

    Water can be a bitch if you get it in anywhere it's not supposed to be.
     
  11. Thornton69

    Thornton69 Active Member

    453
    Sep 15, 2014
    Northern BC
    1981 245 SDC
    1984 18' Valco sled
    5.7 260 Merc/ Bravo 2
    Evanrude 115/80 jet
    All water will not come out by simply draining. Even multiple oil changes. It will suspend itself in high spots in the valley under the intake manifold and rocker covers. Unless you remove these items to flush you can be packing it around for a long time. Marine engines normally don't get hot enough to work it out without some help.
     

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