Checking The Engine Idle Speed - Yamaha 55DEHD Service Manual

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The throttle cable joint 3 must be
screwed in a minimum of 8.0 mm (0.31 in)
a.
NOTE:
Pull the throttle cable toward the engine to
remove any free play in the cable before
adjusting the position of the throttle cable
joint.
4. Connect the throttle cable joint 3, install
the pin 2, and then tighten the lock nut
1.
2
3
1
5. Check that the throttle grip or remote
control lever fully closed position and
adjust the throttle cable length, if neces-
sary, repeat the steps 1–4.

Checking the engine idle speed

1. Start the engine and warm it up for 5 min-
utes, and then turn off the engine.
2. Attach the special service tool 1 to spark
plug wire #1, and then start the engine.
6885J11
3. Check the engine idle speed. Adjust the
engine idle speed if out of specification.
4. Turn the throttle stop screw 2 in direction
a or b until the specified engine idle
speed is obtained.
68830165 a
NOTE:
9 To increase the idle speed, turn the throttle
stop screw in direction a.
9 To decrease the idle speed, turn the throttle
stop screw in direction b.
5. If the specified engine idle speed can not
be obtained, adjust the pilot screw or
adjust the length of the throttle cable.
NOTE:
9 To adjust the pilot screw, refer to page 4-15.
9 To adjust the throttle cable, refer to page
3-7.
Control system
Digital tachometer 1: 90890-06760
Engine idle speed:
750–850 r/min
b
1
1
2
68830310
3
4
5
2
6
68830320
7
8
9
3-8