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  1. F

    Engine flushing 150 yamaha

    how much water PSI to have muffs flush engine?
  2. F

    Engine flushing 150 yamaha

    How much water PSI to use muffs to flush
  3. F

    Engine flushing 150 yamaha

    what is minimum water PSI needed to have muffs flush enging?
  4. F

    Engine flushing 150 yamaha

    How much water PSI needed to use muffs to flush
  5. F

    Engine flushing 150 yamaha

    How much PSI needed to use muffs to flush upper engine and lower unit
  6. F

    Engine flushing 150 yamaha

    sorry, know it is muffs. not running engine to flush
  7. F

    Engine flushing 150 yamaha

    recently, that is not a problem
  8. F

    Engine flushing 150 yamaha

    Engine not flushing thru "Pee hole". bought new Yamaha 2017 150hp. Have a dock with a lift and boating in salt water. 1.75 years later realize water hasn't come out of pee hole when flushing. As per a neighboring marina's techs I performed a few things incase line plugged. In end they said...
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