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60 HP Yamaha runs fine idle speed but bogs down at full throttle. what's up?

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  • 60 HP Yamaha runs fine idle speed but bogs down at full throttle. what's up?

    I just purchased at auction a pontoon with 2006 60hp 4 stroke Yamaha. It started smoothly and ran perfectly for 15 minutes then lost power - like it ran out of gas. It starts and idles perfectly and will run full throttle for a minute or two after it has been turned off for 10-15 min. But then has the same issue of bogging down as if it is running out of gas. I have replaced the fuel filter. Any ideas or suggestions on what to try next?

  • #2
    Re: 60 HP Yamaha runs fine idle speed but bogs down at full throttle. what's up?

    Could be overheat putting in safe mode, might test to make sure alarms work properly

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    • #3
      I have a 2005 60 hp Yamaha that is doing this as well. Very frustrating. So far we have determined no fix for it. I have done the following:
      Cleaned and inspected the entire fuel system.
      Cleaned and inspected the entire cooling system.
      Scanned the engine , removed all trouble codes, and addressed a vague cooling trouble code and removed it.
      Gone over every fuel , electrical , and cooling connection , fitting , and component.
      Replaced the fuel injection pump ,primary fuel pump , thermostast , impellor and cleaned all related sensors and components.
      Unconnected the shift cable position switch with no change.
      Hours and hours of needed ,but not critical , work has been done with very little change in the problem.
      Anyone smart , experienced enough to get this solved on here?
      Thank you ,Steve

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      • #4
        First thing you do is ....................................Start your own thread. Look at the Help Tips on top of the page.
        BOAT SPECS | FORUM HELP | STARCRAFT FORUM | SHOP iBoats
        Please, no PM's (Private Messages) regarding boat/engine problems.
        That is what the forums are for.
        Only forum/moderator issues will be answered in PM's.

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        • #5
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