Yamaha 25BMH Service Manual page 114

CHK
CONTROL SYSTEM
ADJ
(5) Set the shift lever
tion.
(6) Fully open the throttle
the throttle to the "FAST" position.
Full throttle operating range
5,350 ± 100 r/min
(7) Check the ignition timing by pointing
the timing light at the timing indicator
on the starter case.
Ignition timing (at full advance)
25B: BTDC 22° ± 2°
30H: BTDC 25° ± 2°
(8) Move the throttle
tion.
Engine idle speed
1,100 ± 50 r/min
(9) Check the ignition timing by pointing
the timing light at the timing indicater
on the starter case.
Ignition timing (at idle)
25B, 30H: ATDC 2° ± 2°
NOTE:
• Ignition timing
required if the timing indicator reading
falls within the specification.
• If the reading is out of specification,
adjust the timing by the following pro-
cedure.
3-5
E
1
in forward posi-
2
by moving
2
to full-close posi-
adjustment is not