Welcome Guest - Sign Up today
Welcome Guest - Sign Up today
Store Links Mobile - Shop Now



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.
See more
See less

50 horse water pump help

  • Filter
  • Time
  • Show
Clear All
new posts

  • 50 horse water pump help

    i have a 1982 mercury 50 h.p. all i feel out the pee hol is warm air. just curious if i may just not have it in the barrel deep enough.or what else could be the problem.

  • #2
    Re: 50 horse water pump help

    If you have the motor submerged to at least 6 inches above the 'split' between the lower unit and the center section (AKA "exhaust tower" or "mid section") that should be plenty. If the water is just up to the 'split' that's probably not enough. If you have a set of "muffs" you can be sure that you're getting adequate water to the motor. With the motor running, you should adjust water pressure such that some water spills out the muffs.

    At any rate, if you're sure the water supply (whether in barrel or via garden hose) is OK, you probably have a bad impeller and it's time to drop the lower unit.

    Check the FAQ section of the iboats forums for impeller changeout procedures and/or pick up a good manual. Just don't run it any more once you figure out for sure that it's not getting water; you can burn up the powerhead in short order if you're underway, at speed, with no cooling!



    • #3
      Re: 50 horse water pump help

      well i just changed the water pump. but was wondering if maybe a missing rubber grommit between the pump and tube or something.

      plus more questions to come.


      • #4
        Sign up today
        Re: 50 horse water pump help

        Check and make sure the impeller key didn't fall out of place. Also (more likely) check to ensure that the copper water supply tube engages the pump body as you're installing the lower unit. There definitely should be a rubber grommet in the pump where the water tube sits. Put a dab of grease on the rubber grommet I.D. and the water tube O.D. to help the 2 parts slide together.....ed