• If this is your first visit to the iboats.com Boating Forums, be sure to check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages, select the forum that you want to visit from the selection below.

Announcement

Collapse

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.

2. Old topics should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.

4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.

5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís topic. And those answers will be specific to your particular issue.

6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.

7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

1990 25hp Mercury water pump replacement

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts


  • 1990 25hp Mercury water pump replacement

    I told my neighbor I could replace his water pump that failed on his outboard. I can't believe how hard it is to find which parts are for this outboard. I usually work on Johnsons.
    His serial # is C258397. Model number is 1025312j. He hasn't replaced it in 20 years. All that was left was a nub.
    I don't need a total kit. I need the impeller, gaskets, O-rings and the rubber piece the water tube goes into.
    Any help would be greatly appreciated.
    Thanks.


  • #2
    Re: 1990 25hp Mercury water pump replacement

    Originally posted by MNmarty View Post
    All that was left was a nub.


    Uh oh..that's not the kinda news you wanna here. If you're looking for a good way to kill your motor then don't replace your impeller. Better have him do a compression check on that guy if he only had a nub left. The good thing for you is that it's not your boat. Could get expensive. Iboats has the impeller kit you are looking for tho with part #18-3215. However, this kit does not include the water pump inlet tube, so you will have to purchase this separately. They have this as well tho under part #18-3109. Good luck to you both!

    Comment



    • #3
      Re: 1990 25hp Mercury water pump replacement

      Thanks. That sierra kit looks like the gasket I took out. What had me all messed up is the catalog says the 18-3427 kit is the replacement for that serial number. Those gaskets looked nothing like the one in the outboard.
      I hear ya about compression. I don't have a gauge to check it. I've already taken the lower unit off and the kit is only around $20. I might as well replace the water pump and put it back together. It's an outboard on his pontoon that he uses to take the evening booze cruise. Might not even notice if the power is low. He may have really screwed it up though. The motor was sizzling when it died!
      Thanks again for looking up the numbers.

      Comment



      • #4
        Sign up today
        Re: 1990 25hp Mercury water pump replacement

        I am also trying to replace the water pump on my 1990 25hp mariner but I can't get my lower unit off. I can't figure out how to get the gear shifter unattached. Please help.

        Comment


        Working...
        X