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    Maintenance

           sary  technical knowledge, poor engine
           performance and damage may result.
           The carburetor is a vital part of the engine and
           requires very sophisticated adjustments.
           Most adjustments should be left to a Yamaha
           dealer who has the professional knowledge
           and experience to make them.
           However, the operator may adjust the engine
           idling speed as part of the usual maintenance
           routine.
           EJU34472
           Adjusting the engine idling speed
           (1) Place the watercraft in the water.
           (2) Start the engine and warm it up for 1 to 2
              minutes.
           (3) While  using a diagnostic tachometer,
              turn the throttle stop screw to adjust the
              engine idling speed to specification. Turn
              the throttle stop screw clockwise to in-
              crease the engine idling speed or coun-
              terclockwise to decrease the engine
              idling speed.

            1 Throttle stop screw
             Engine idling speed:
               1300 ±50 r/min

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