• 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 Module

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

25hp Mercury/Tracker overheating....

Page Title Module
Move Remove Collapse
Conversation Detail Module
  • Filter
  • Time
  • Show
Clear All
new posts

  • 25hp Mercury/Tracker overheating....

    I have a 1999 Mercury/Tracker 25 hp that has about 115 hours on it. The exhaust manifold cover gasket failed on the rear/lower portion and a pencil lead stream of water was squirting out.I presume this was probobly caused by a blocked inlet pickup (heavey weeds) while trolling at night. I removed the gaskets, cleaned the areas well and reinstalled new manifold and cover gaskets then torqued the bolts to spec.Upon testing the motor for watertightness using hose and muffler I noticed the water exiting was very hot. The lower head/cylinder was cool to the touch while the upper head/cylinder was very hot.This doesn't seem right, shouldn't both cylinders be in about the same heat range?Does anyone know if this is how this motor operates? Any help is very appreciated.Thanks,-2stroker (switching to 4 soon)

  • #2
    Re: 25hp Mercury/Tracker overheating....

    Did you replace the impeller? If the cover gasket failed to overheating, the impeller may have been cooked a bit in the same incident. You may have inadequate water flow now. How strong of a stream is coming from the tell-tale? It should be nice and warm not scalding hot.