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Water In Cylinder?

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  • Water In Cylinder?

    My 91 250 got some water in the #6 and got stuck from sitting. I pulled the head off and got her spinning again but need to find the source.

    The heads were changed in the past and it and the gasket both looked good. I took the exhaust cover off and things look good there also. There is almost no salt in the motor and I checked closely with a flashlight and see no corrosion.

    Before I put it back together does anyone have any ideas?

    A friend said something about a lower crank seal. Is there a way to check that?

    The plug was rusty but the top of the piston had no carbon on it.

  • #2
    If it sits low in water or get a lot of backwash when drop throttle(water inside cowling) then it may sucked water in through intake.
    Regards
    Boats.net
    Yamaha Outboard Parts

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    • #3
      Hmmm. Ii did get rained on pretty good without the cowling right befor I put it away.

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      • #4
        yes it sat....but wouldnt make it to the cyls until you cranked it which you couldnt.
        you inspected the head gasket well ???

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        • #5
          Water in Cylinder

          I also ended up with water in 1986 115 on port side. I plulled heads, exhaust covers. Nothing indicated where the water come from. Head gaskets showed no sign of leaking. I figure age must have taken its toll and it is froze up now so it must have gotten into the crank and bearings as I had it turning over but after set up for a week is now froze. Time for a powerhead replacement.

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          • #6
            Water might have gotten in when the boat was put on the liftand tilted.

            I checked everything and it all looks good. She is spinning nice and I'm going to put her back together and see what happens.

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