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

Mercury 8 hp jumps out of gear???

  • Filter
  • Time
  • Show
Clear All
new posts

  • Mercury 8 hp jumps out of gear???

    I have a late 80's 8 hp mercury outboard. The motor only has around 30 hours on it total. It starts and runs fine. Goes into gear smooth. But when I am about half throttle it kicks out of gear back into neutral. Reves up high and I have to turn the motor off. Clutch dog???/ Any ideas would help.... No shifter on the motor it is all done within the tiller arm from back to forth!

  • #2
    Re: Mercury 8 hp jumps out of gear???

    My guess is also a clutch dog and maybe forward gear.

    I don't respond to Private Messages PM's that are motor questions.

    For basic information on a wide range of topics, see Top Secret File
    Link: http://forums.iboats.com/showthread.php?t=299680

    OEM shop manual: outboardbooks.com or Ebay


    • #3
      Re: Mercury 8 hp jumps out of gear???

      Clutch dog is a good bet but there is still linkage from the tiller to the l/u.c/6Hooty


      • #4
        Re: Mercury 8 hp jumps out of gear???

        There dosnt look like there is an adjustment for the shifter.... I am assuming since it only has 30 hours on it and ws used very little maybe something was messed up to begin with??? I think it would be the clutch dog??? Any other possibilities???


        • #5
          Re: Mercury 8 hp jumps out of gear???

          some times its always the clutch dog I run through them faster then your children run through candy!
          Mes amis nous allons quelque part dont tout
          le monde
          Se rappelle d'un endroit ou l'herbe etait
          toujours verte
          Et la fete ne s'arretait jamais
          A autour du rocher


          • #6
            Sign up today
            Re: Mercury 8 hp jumps out of gear???

            From the tiller handle there is two thottle cables to the shift linkage. There is no shift cables from the tiller handle.#1 Tiller handle: http://www.dolleroffshore.com/parts_.../811286/31.gif #2 Throttle and shift linkage: http://www.dolleroffshore.com/parts_...R/811286/9.gif I don't think the pictures are any help. But I think your pop out of gear can be adjusted. I have the same model (1987). When I bought it and tryed it on my boat there was no real power at wot. Took a look at the linkage, took it apart and reasembled. I had power at wot, until I put it in neutral or reverse. Then the same thing again. Took it apart several times again and 30 minutes later I found out that one joint was almost stuck. Sanded the plastic, cleaned and greased it and it works fine. Well, that is not the same problem you have. I think there is someting about the linkage. Take a good look at it.Good luck!