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

Announcement

Collapse
No announcement yet.

Spark Plug Gap for Yamaha 9.9 4 cycle

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

  • Spark Plug Gap for Yamaha 9.9 4 cycle

    Does anyone Know or Know where I could find the spark plug gap spec. for a 99 Yamaha 9.9 High Thrust 4 stroke outboard.

    Thanks

  • #2
    Re: Spark Plug Gap for Yamaha 9.9 4 cycle

    For what it's worth, I have the Yamaha owner's manual and service manual for a 95 T9.9. The owner's manual says .020 to .024, the service manual says to gap the plugs at .024 to .028.

    Comment


    • #3
      Re: Spark Plug Gap for Yamaha 9.9 4 cycle

      Thanks Ryoung
      I would think they would be the same.

      Thanks
      Chris

      Comment


      • #4
        Sign up today
        Re: Spark Plug Gap for Yamaha 9.9 4 cycle

        You need to post the complete model number from the data plate. The gap can be found in the genuine Yamaha owner's manual or the genuine Yamaha service manual. If your motor uses an NGK CR6HS spark plug, the gap is .024. You need to torque the spark plug when it is installed.

        Comment

        Working...
        X