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1970 Chrysler 55 hp water pump removal

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  • 1970 Chrysler 55 hp water pump removal

    Help!!! I have recently bought a 1970 55 hp chrysler outboard and I need to replace the impeller as it is destroyed. I have the lower unit off and the water pump cover removed (that's how I know what a mess the impeller is) but I can't figure out how to remove the collar at the top of the driveshaft so that I can remove the pump cover and put the new impeller on (see pic). Any help would be appreciated. Thx

  • #2
    Re: 1970 Chrysler 55 hp water pump removal

    Please post a Picture showing the collar. I have a 1970 35hp Chrysler (attached) that could be related to your 55hp but do not remember a collar involved.
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    • #3
      Re: 1970 Chrysler 55 hp water pump removal

      The collar is a support for a rubber bushing or bellows that seals the drive shaft/crankshaft interface against moisture. This keeps the hardened steel crankshaft from rusting and cold welding the drive shaft into it. Some engines had them, some did not.

      Enough! The collar is a light press fit on the shaft and if you get s small punch or chunk of aluminum and gently hammer it radially, (first one side, then the other) it will rock off easily. If you have a long enough gear puller it should work also.

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      • #4
        Re: 1970 Chrysler 55 hp water pump removal

        Thanks for that. I will give it a try and let you know how I got on. As for pics, sorry but I am doing this from my iPhone and can't seem to add them.

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        • #5
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          Re: 1970 Chrysler 55 hp water pump removal

          Originally posted by F150TruckGuy View Post
          Thanks for that. I will give it a try and let you know how I got on. As for pics, sorry but I am doing this from my iPhone and can't seem to add them.
          Thanks for the info guys. I now have a new impeller and water pumping out (always useful). I have just finished JB welding a crack in the exhaust cover and am going to run it in the barrel tonight and the river on Sat. Can't wait!!

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