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1979 25 HP Evinrude Water Pump Replacement

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  • 1979 25 HP Evinrude Water Pump Replacement

    I have a 1979 Evinrude 25 HP outboard, (E25RCSA) and I'm having trouble removing the lower end to replace the water pump.
    I have removed the 4 bolts (2 each side) & loosened the back nut. I have also removed the linkage bolt inside the engine.

    The problem is the unit won't drop, it seems that the back bolt is stuck in the housing and won't release, I've sprayed it with WD and let it sit but it still won't come off.

    Am I missing a bolt somewhere that's not visible?

    Once I do get it replaced will I only see water from the Pee Hole or will I also see water from the 2 holes just below the cowling?

    Thanks for any help.

    Jerry

  • #2
    Re: 1979 25 HP Evinrude Water Pump Replacement

    You've got a 1980 model. Loosen that nut on that back stud and try a hammer on it. The stud could be corroded in the housing. You may also want to get a mapp gas torch and heat the housing area where the stud goes through. Throw the WD away and get some PB Blaster.
    Last edited by boobie; November 9th, 2013, 01:20 PM.

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    • #3
      Re: 1979 25 HP Evinrude Water Pump Replacement

      You're not missing any bolts. My guess is you have a salt water motor.
      I agree with boobie. That rear stud is causing you grief.

      Once you replace the WP. It should pee and spray a mist from the exhaust releaf
      ports on the back of the leg.

      Here's mine for reference.





      '77 Crestliner Voyager Deluxe 16' (semi V), Spartan WondeRoll tilt trailer, '81 Johnson 25 hp, '88 Johnson 30 hp, '87 Evinrude 30 hp

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      • #4
        Re: 1979 25 HP Evinrude Water Pump Replacement

        You may need considerable heat. Without it you can break the housing. Best bet is to take it to someone who is familiar with this problem. When you reassemble it always use OMC thread sealer on the threads and shanks of the bolts. I get this problem brought to me frequently.

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        • #5
          Re: 1979 25 HP Evinrude Water Pump Replacement

          Thanks for the advice, heating the bolt area did the trick. And thanks for the video, a picture really is worth a thousand words.

          Jerry

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          • #6
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            Re: 1979 25 HP Evinrude Water Pump Replacement

            Originally posted by 111torrance111 View Post
            Thanks for the advice, heating the bolt area did the trick. And thanks for the video, a picture really is worth a thousand words.

            Jerry
            Glad to hear. Thanks for the update.
            '77 Crestliner Voyager Deluxe 16' (semi V), Spartan WondeRoll tilt trailer, '81 Johnson 25 hp, '88 Johnson 30 hp, '87 Evinrude 30 hp

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