• 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

Primer Bulb won't stay hard.

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


  • Primer Bulb won't stay hard.

    I have a 2 stroke 1990 mercury 90 horse, and whenever I go to pump the primer bulb, to get fuel to the motor, the bulb will not get hard, you can keep squeezing it, What are the symptoms of something like this? Thanks


  • #2
    Re: Primer Bulb won't stay hard.

    Could be as simple as a bad check valve in the bulb. Replace the bulb. Check all your fuel lines for cracks and replace as necessary.
    "A manual is a cheap investment"
    Fair Winds and Following Seas
    Bill
    PTC USN ret

    Comment



    • #3
      Re: Primer Bulb won't stay hard.

      Weaver, It could also be a bad diaghram in the fuel pump. This allows raw gas into the crankcase, and will lock up the motor if it builds up too much.

      Comment



      • #4
        Re: Primer Bulb won't stay hard.

        Originally posted by *WEAVER* View Post
        I have a 2 stroke 1990 mercury 90 horse, and whenever I go to pump the primer bulb, to get fuel to the motor, the bulb will not get hard, you can keep squeezing it, What are the symptoms of something like this? Thanks

        sounds like you already have the symptoms
        could be a lot of things:
        The pickuup in the tank has come off or is not sumberged in gasoline
        blocked or broken in fuel line
        the check valves in the primer bulb are not working correctly
        etc.

        I would replace the bulb and see if that fixes it first... then start checking other things.

        Comment



        • #5
          Re: Primer Bulb won't stay hard.

          The primer bulb never really "gets hard" because the fuel pump is sucking (rather than pushing) fuel through the bulb so there is no pressure being built up in the bulb. If the bulb is getting sucked flat and such, then that is a better indication of a restriction in the fuel line.

          To be more certain that you have a restriction in the fuel line or related problem, you can consider using a vacuum gauge to test the system. The below linked thread contains a guide for how to do this.

          http://forums.iboats.com/showthread.php?t=261581
          1996 Mercury 150HP V6 carbed outboard motor and Maxum 1900XR bowrider boat

          Comment



          • #6
            Re: Primer Bulb won't stay hard.

            Thanks for the help everybody. I probably didn't explain myself real well, my other boat I had, had a 2 stroke engine on it, and when I would first go to pump the primer bulb, after a couple of squeezes, it would get full. This one I have now, when I do that, you can keep squeezing it, and it will never get full. But I will try messing with the pump, and possibly put a new fuel line on it and connectors on it and see if that helps.

            Comment



            • #7
              Re: Primer Bulb won't stay hard.

              A fuel line restriction would not result in the symptoms you now describe, so never mind about the vacuum gauge tests. If the carb floats/valves are leaking or you have a hose leak between the bulb and the carbs, you would see the fuel gushing out somewhere. If you do not see this, I would conclude that it is the bulb that needs replacing. If replacing the bulb does not fix it, I would then consider the other good suggestions already mentioned in the earlier posts.

              Just my thoughts...
              1996 Mercury 150HP V6 carbed outboard motor and Maxum 1900XR bowrider boat

              Comment


              Working...
              X