• 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

Announcement Module
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

1989 Evinrude 90HP - Bogs down and dies on throttle-up

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


  • 1989 Evinrude 90HP - Bogs down and dies on throttle-up

    Need help with a 1989 Evinrude 90hp, has vro removed. When on the water the engine bogs down and then dies on throttle. If I throttle back, it will idle fine and troll fine. When out of the water hooked to the hose it runs fine no bogging down and it doesnít die.

    I have removed the gas and put some new gas in 50:1 mixture and it didnít make a difference. I changed the spark plugs (they were a little wet), rebuilt the carbs (they looked fine though), check the compression (it was good at 120-123), spark tested fine.

    After completing the above, the boat still runs the same way. It bogs down and dies on throttle up. Primer bulb does feel firm, and it doesnít make a difference if its pumped when the boat is bogged down, it still dies.


  • #2
    Re: 1989 Evinrude 90HP - Bogs down and dies on throttle-up

    did yu remove all the jets, when cleaning the fixed jets are behind plugs, and require a special tool to remove. still sounds like you have clogged high speed jets. or your link&sinc is off.
    FLORIDA GATORS
    TEBOW Country



    Please, NO PM's (Private Messages) regarding boat/engine problems. they will not be answered.
    That is what these forums are for. Post your questions, in the appropriate Forum.

    Comment



    • #3
      Re: 1989 Evinrude 90HP - Bogs down and dies on throttle-up

      i wish I had some ideas for you but I haven't been able to fix my own boat. I have a 68 evinrude 55hp with a simular problem. I have cleaned the carbs, replaced the fuel lines, checked compression, adjusted the floats, and cleaned the high spead orfices......I haven't got much of a clue on where to go next. I have posted a thread called
      "68 evinrude 55hp" It might be worth a look.

      What is a link and sync?

      Comment



      • #4
        Re: 1989 Evinrude 90HP - Bogs down and dies on throttle-up

        Don't rev it up on the muffs, beyond what you need to keep it running, risk of thermal runaway and major damage.

        How it runs on the muffs is no indication of how it'll run under load.

        You can't "see" whether carbs have blockages. Did you soak 'em overnight in something like b-12 chemtool? Remove the core plugs & shoot compressed air or carb cleaner in the spray can through all the orfices?

        Check the timer base make sure it moves smoothly without sticking when throttle is advanced. Also make sure the throttle cam hits the roller right on the mark - slightest bit early will make it die on acceleration. Make sure throttle plates are parallel.

        Look for a leak in the primer valve (jdt, you have choke plates instead, make sure they are open - perfectly horizontal - except when the choke is engaged)
        It's all about the tools.

        "If the ocean is glass flat and the sun is shining, you open up the special memory compartment of your brain and start recording the smells, sounds, sights and feelings." -- Philster

        "Poets talk about 'spots of time,' but it is really fishermen who experience eternity compressed into a moment. No one can tell what a spot of time is until suddenly the whole world is a fish and the fish is gone. I shall remember that son of a b**** forever." -- N. Maclean

        Comment


        Working...
        X