• 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.
  • ALL iboats Forum Members and Guests:
    To show our appreciation for your participation in the Forums, we're offering an exclusive Forums-only discount good for an additional 5% off your iboats.com order for a limited time.
    To redeem, simply call our Customer Service Team at 800-914-1123 (Open M-F, 9am - 8pm Eastern Time) and mention the Forums 5% off discount. Offer excludes engines, trolling motors, and electronics.

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 threads or hijack existing threads. Old threads of a technical nature are like a library book, Please do not write in them.

2. Old threads should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís thread (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 thread of your own.

4. If you have a question for the original poster (OP) and the thread 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 thread.

5. By starting your own thread, 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 thread. And those answers will be specific to your particular issue.

6. Please do not post to threads that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any thread 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 thread.

7. Posting at the end of any thread is considered to be hijacking the original posters thread which in turn subjects the thread 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 thread asking you not to reply to old threads. The Red banner will read: Please note this thread has been inactive for 90 days. For the best results, please start a new thread.

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

Yamaha 25 HP 4 cycle Carb Problems ??

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


  • Yamaha 25 HP 4 cycle Carb Problems ??

    Hi, This subject was posted by "tjtraver" on 2002-07-03. I was wondering Todd, if you had any successful outcomes, because my motor is doing the exactly the same thing! I have pulled the carby apart and everything looks 'in order', also all the fuel lines are clear. After about 20 minutes flat stick, she dies. Any help would be much appreciated, as before this problem the motor has never let me down. "I have a 4 or 5 year old yahama 25 hp 4 cycle engine that starts and runs fine for about 30 minutes ... then the engine quits running and has fuel running out the overflow from the top of the carb... Anyone have ideas what's going on here ? Is it somehow fuel presure related ? Any insights into this problem appreciated ... Thanks, Todd Traver"


  • #2
    Re: Yamaha 25 HP 4 cycle Carb Problems ??

    hello most likly trash in the fuel lines or a bad needle/seat or a faulty float. time to test not a hard job but sometimes must be done.
    no tech questions by PM, they wont get answered.
    you have to be trusted by the people that you lie to .

    Comment



    • #3
      Re: Yamaha 25 HP 4 cycle Carb Problems ??

      Had the same thing.Turned out to be a float needle valve problem.Disasemble the carbs carefully and check and clean all the float parts in each of the carbs. I had 4 carbs on my 50 4 stroke Yammy. These guys have a habit of gumming up for no apparent reason.

      Comment



      • #4
        Re: Yamaha 25 HP 4 cycle Carb Problems ??

        thanks for the advice. I will let you know the result....

        Comment



        • #5
          Re: Yamaha 25 HP 4 cycle Carb Problems ??

          I ended up changing gas tanks and it is not a problem now. I had several mechanics fix the motor, but it turned out to be a tank issue. Hope this helps.

          Comment



          • #6
            Re: Yamaha 25 HP 4 cycle Carb Problems ??

            Walmart carries a fuel/water separater/filter for $27, easy 2 screw installation on transom, can save you a lot of grief with water, debris,ethanol,old, contaminated fuel problems. A good investment!

            Comment

            Working...
            X