Checking The Timing Plate - Yamaha 55DEHD Service Manual

6. Set the control lever 2 3 to full advanced
position.
3
7. Check that the ignition timing advances
to the specified position b, when the full
advanced.
Specified position b
(full advanced):
55D, 75A: BTDC 21–23°
85A: BTDC 23–25°
8. If the ignition timing is not specification,
check the ignition timing plate position
and timing stopper position.
NOTE:
9 To check the timing plate, refer to next pro-
cedure.
9 To check the timing stopper, refer to page
3-11.
6885J11
9. Turn off the engine, and then remove the
special service tools.
10. Install the throttle link rod and connect
the throttle cable.

Checking the timing plate

NOTE:
Remove the all spark plugs and lock plate
before adjusting the timing plate.
1. Slowly turn the flywheel magnet clock-
wise and align it with the piston of the #1
cylinder at the TDC.
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2. Install the special service tool 1 into the
#1 cylinder.
b
NOTE:
Set the dial gauge to "zero" position which is
more than 4 mm from TDC.
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Control system
Dial gauge set 1 : 90890-01252
1
2
3
4
1
5
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6
7
8
9
3-10