CONTROL SYSTEM
CHK
ADJ
3-4
E
CONTROL SYSTEM
ADJUSTING THE IGNITION TIMING
CAUTION:
Ignition timing adjustment on the running
engine must be performed in the test tank
with a te st propeller installed on the
engine.
WARNING
While checking the engine, do not touch
the rotating part (flywheel), CDI unit, igni-
tion coil, and any other hazardous areas.
1. Check:
•
Ignition timing
Out of specification
→
Adjust.
Checking steps
(1) Install the timing light
onto the spark
plug lead of cylinder #1.
(2) Install the digital tachometer
onto
the spark plug lead of cylinder #1.
(3) Press the position key “C” on the digital
tachometer.
(4) Start the engine and allow it to warm
up for a few minutes.
Test propeller
90890-01629
Ignition timing (at idle)
25B, 30H: ATDC 2° ± 2°
Ignition timing (at full advance)
25B: BTDC 22° ± 2°
30H: BTDC 25° ± 2°
Engine idle speed
1,100 ± 50 r/min
Full throttle operating range
5,350 ± 100 r/min
Timing light
...................................
90890-03141
Digital tachometer
........................
90890-06760
a
b
a
b
Содержание 25BMH
Страница 48: ...FEATURES AND BENEFITS GEN INFO 1 12 E COOLING SYSTEM Fig 7 ...
Страница 49: ...1 12 CARACTERISTIQUES ET AVANTAGES GEN INFO F ...
Страница 50: ...1 12 MERKMALE UND VORTEILE GEN INFO D ...
Страница 51: ...1 12 CARACTERÍSTICAS Y VENTAJAS GEN INFO ES ...
Страница 92: ...MAINTENANCE SPECIFICATIONS SPEC 2 8 E DIMENSIONS ...
Страница 156: ...GENERAL CHK ADJ 3 26 E NOTE Grease the inner cable and the lock nut 2 Apply Yamaha grease D ...
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Страница 446: ...Printed on recycled paper Printed in Japan Oct 2000 1 9 1 25BMH 30HMH YAMAHA MOTOR CO LTD ...