Welcome Guest - Sign Up today
Welcome Guest - Sign Up today

Announcement

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.

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

Yamaha 15hp four stroke

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Yamaha 15hp four stroke

    Good evening,

    It is an 2005 and I have had it about a year. It has always ran rough at idle. It was cutting off at idle until it was rebuilt the first time. It continued to idle rough but wouldn't die. Had a shop rebuild it again and now a new carb. Still idles rough but great other than that. I have changed all fuel lines, new tank, filters, non ethanol gas. It's only a pull start check compression both cylinders are about 70psi.

    2nd question is.. at only about 3/4 throttle there is a winding sound almost like a super charger. Nothing above or below that rpm range. Any ideas?

  • #2
    Carburetor rebuild

    Comment


    • #3
      Have you checked valve lash?

      Comment


      • #4
        I have not checked the valve lash.

        Comment


        • #5
          I checked them. They are within specs.

          Comment


          • #6
            Sign up today
            Originally posted by countryboy996 View Post
            I checked them. They are within specs.
            Sync carbs correctly?

            Comment

            Working...
            X