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105hp chrysler wont pump water?????

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  • 105hp chrysler wont pump water?????

    hi there,

    I have a chrysler 105hp outboard and it wont pump water. I have had the leg off several times, it has a new impeller and will flow if a hose is connected to the water pick up with leg leg off. I have replaced the thermostate with a restricter plate and checked the releif valve. I removed the prop to see what happened when reving the motor breifly, the rear of the leg bubbled like the pump was cavitating.
    Please help, I love this old girl but am very much stumped.

  • #2
    Re: 105hp chrysler wont pump water?????

    When you changed the impeller did you check the inside of the housing, steelplate and the driveshaftseal?
    The surface inside the housing and the steelplate must be smooth. Check the tube pick up to the plastic or rubber grommet if it has, so you have got it in the right Place.

    BTW The bubbles from reving it up is the exhaust coming out from the snort.

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    • #3
      Re: 105hp chrysler wont pump water?????

      +1^^^ You may need a whole water pump kit in addition to just the impeller if the water pump casing has any holes in it or is warped or seals/gaskets are in bad shape. Otherwise I think Nordin is spot on.
      Last edited by tazrig; December 22nd, 2013, 04:54 AM.

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      • #4
        Re: 105hp chrysler wont pump water?????

        Have you tested deep in a 55 gal barrel, lake, river, etc vs muffs?
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        • #5
          Re: 105hp chrysler wont pump water?????

          Originally posted by wickware View Post
          Have you tested deep in a 55 gal barrel, lake, river, etc vs muffs?
          +1....my Force 40 doesn't pump well with muffs, they just don't fit tight enough, run it in a barrel and it pumps like the Dickens.....I bought a trash barrel at Walmart for $12, cut it 27" tall, and slide it under, no problem.......
          It is better to be silent and thought a fool,
          Than to speak and remove all doubt...

          If you can't find the time to do it right,
          Where will you find the time to do it over?

          A Craftsman always does it right,
          Because he doesn't know any other way....

          If at first you don't succeed,
          Don't take up skydiving....

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          • #6
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            Re: 105hp chrysler wont pump water?????

            What year is your 105? Is it a one piece lower unit with prop thrust plate or a two piece lower with a thrust pin drive prop?

            If it is a one piece lower unit you need to check the lower water pump plate, There is a separating web which can corrode through, allowing intake water to bypass the pump. If this is the case, you must rebuild the web as a stopgap solution and replace the lower plate and drive shaft seal.

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