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Yamaha power head

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  • Yamaha power head

    Hello I am a new member and my engine is a 225 4stroke efi 2004. The problem I am having is in neutral my engine goes to 6000rpms,then when I put it in gear or forward it will only go to 3000rpms. Please help its acting like it's in the safe mode.

  • #2
    as was said in the other post, reving a motor with no load on it means nothing.
    even without some cylinders firing it will spin up.

    compression or leak down test of all cylinders is needed.
    spark to all spark plugs and timing need to be verified.
    make sure timing is advancing as it should.

    if all of that is OK then look at fuel
    filters and screens cleaned /replaced , pump pressures verified in spec, injectors serviced

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    • #3
      Probably a plugged injector screen or 2......losing power on those cylinders.....may be a good idea to have all injectors cleaned and serviced.....

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