Yamaha F6AMH, Service Manual

Page: 126 / 510

POWER UNIT
CHECKING THE IGNITION TIMING
NOTE:
Ignition timing is automatically controlled
by the CDI unit. Therefore, only checking
the procedure is shown in this section.
Before ignition timing, warm-up the
engine. Correct checking cannot be
obtained when the engine is cold.
Check:
Ignition timing
Incorrect firing range
Check the
ignition system components.
Checking steps:
(1)Start the engine and allow it to warm
up for several minutes.
(2)Attach the engine tachometer and the
timing light 1 to the spark plug lead 2
of cylinder #1.
(3)Aim the timing light
1
at the flywheel
cover 3 and make sure the stationary
pointer
4
is with in the firing range
5
and 6 when engine is running with
specified speed.
Ignition timing:
At idling speed: 5° range
At 4,500 r/min speed: 30° range
Engine tachometer:
YU-8036-B/90890-06760
Timing light:
YM-33277-A/90890-03141
3-18