Adjusting The Engine Idling Speed - Yamaha T135SE Service Manual

ADJUSTING THE ENGINE IDLING SPEED

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Yamaha T135 Service Manual
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EAS00054
ADJUSTING THE ENGINE
IDLING SPEED
NOTE:
Prior to adjusting the engine idling speed, the air
filter element should be clean, and the engine
should have adequate compression.
1. Remove:
9side cowlings (left and right)
9front cowling
9rear cowling (left)
Refer to "REMOVING THE SIDE COWL-
INGS", "REMOVING THE FRONT COWL-
ING" and "REMOVING THE REAR COWL-
INGS".
2. Start the engine and let it warm up for sev-
eral minutes.
3. Connect:
9engine tachometer
(onto the spark plug lead)
Engine tachometer
90890-03113
4. Check:
9engine idling speed
Out of specification → Adjust.
Engine idling speed
1,300–1,500 r/min
5. Adjust:
9engine idling speed
MMMMMMMMMMMMMMMMMMMMMMMM
a. Turn the pilot air screw 1 in or out until it is
lightly seated.
b. Turn the pilot air screw out the specified
number of turns.
Pilot air screw setting
1-5/8 turns out
c. Turn the throttle stop screw 2 in direction
a or b until the specified engine idling
speed is obtained.
Engine idling speed is
Direction a a
increased.
Engine idling speed is
Direction b b
decreased.
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CHK
ADJ