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  1. #1

    Default Water Separator Thoughts???

    1989 70hp Johnson

    I had a problem with what was a good running motor. I was planning on removing my fuel tank to do some work in the bilge area. I ran the tank to about 1/4 full. I never got to remove it before running it again. The boat sat for about 3 weeks and during that time we had hurricane Irma and lots of damp humid weather during the 3 weeks it sat. I topped of the tank and took it out. Motor fired right up as normal. Idled fine and it ran for about 10 minutes at 3500 rpm with no issues. Then it bogged down and died. Re-started but continued to have running issues for hours. Some of the sounds I heard during the problem time were scary. Eventually I got it running good and got it home.

    Normally I always fill that fuel tank before putting it away. I'm thinking maybe I should add a water separator to prevent a similar issue. I know filling the tank should have prevented this, but I still thinking separator. I also know all about "leaving good alone".

    Thanks,
    John

  2. #2
    Join Date
    Nov 2011
    Posts
    1,566

    Default Re: Water Separator Thoughts???

    So, what makes you think it was a water problem? (Not saying it wasn't--who knows).

    A water separator can remove a small amount of water, but it can be overwhelmed by a large amount of water, such as a contaminated fillup from the gas station's tanks.

  3. #3

    Default Re: Water Separator Thoughts???

    Why water problem? Not sure but I'm asking myself what was different after the motor was running fine last trip out. The difference that I came up with was not filling the fuel tank before putting it away. So I'm thinking fuel issue. I live in Florida where we get daily rain, high humidity and in this case a hurricane with 6+ inches of rain and high winds. Maybe water entry thru the vent in addition to condensation inside the tank.

    I'm going to change the in-line fuel filter and maybe add a water separator with visible bottom.

  4. #4
    Join Date
    Nov 2011
    Posts
    1,566

    Default Re: Water Separator Thoughts???

    Yeah, I live in Florida too, and know all about that daily rain and humidity. But I've never experienced that amount of condensation in fuel tanks.

  5. #5
    Join Date
    Apr 2010
    Posts
    3,687

    Default Re: Water Separator Thoughts???

    Take a fuel sample in a clear jar, leave it sit and check for water.

  6. #6
    Join Date
    Apr 2010
    Posts
    3,687

    Default Re: Water Separator Thoughts???

    fdrgator, what part of FL do you live in ?? I spent time in the "eye" of Irma.

  7. #7
    Join Date
    Nov 2011
    Posts
    1,566

    Default Re: Water Separator Thoughts???

    Sarasota, West Coast.

  8. #8

    Default Re: Water Separator Thoughts???

    Boat lived in Sarasota. I fled to Pensascola.

  9. #9
    Join Date
    Dec 2015
    Location
    maplevalley WA
    Posts
    3,541

    Default Re: Water Separator Thoughts???

    Run the engine with a known clean portable tank and see if it cures the issue. Is that a permanent tank?
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  10. #10

    Default Re: Water Separator Thoughts???

    Yes permanent tank. I no longer own a portable tank.

  11. #11

    Default Re: Water Separator Thoughts???

    I added a water separator with clear bottom. Hopefully I don't regret it.

    I'm going to attribute my problem to hurricane Irma as I suspect the fueling station was under water and my purchase was made just after the storm.

    I'll see.

    Thanks,
    John

  12. #12
    Join Date
    Feb 2001
    Location
    Central West Florida
    Posts
    14,142

    Default Re: Water Separator Thoughts???

    Quote Originally Posted by John Haggerty View Post
    I added a water separator with clear bottom. Hopefully I don't regret it. I'm going to attribute my problem to hurricane Irma as I suspect the fueling station was under water and my purchase was made just after the storm. I'll see. Thanks, John
    Smart move! Don't know why you think you might regret it.... Having a rig without a good one is ******** the way storms pop up in our neck of the woods (Tampa area).
    We occasionally have questions. If you fail to answer, it may affect ours.

  13. #13
    Join Date
    Sep 2010
    Location
    Jersey Shore
    Posts
    4,632

    Default Re: Water Separator Thoughts???

    Are you burning E-10 in your engine?
    Chris
    Dockside Marine Services
    Jersey Shore.
    Mercruiser/Mercury Certified
    Let the insanity begin.

  14. #14
    Join Date
    Feb 2001
    Location
    Central West Florida
    Posts
    14,142

    Default Re: Water Separator Thoughts???

    Quote Originally Posted by joereeves View Post
    Smart move! Don't know why you think you might regret it.... Having a rig without a good one is ******** the way storms pop up in our neck of the woods (Tampa area).
    I'm sure that starred out area was NOT a bad, cuss, or in general a fouled up word... can't imagine what I could have said to encounter that.
    We occasionally have questions. If you fail to answer, it may affect ours.

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