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6-3 TIMING ADJUSTMENT
(See
Figs.
42,43
and
44.)
The spark is timed to occur at 23" before the piston reaches TDC
on
the compression stroke. This spark ad-
vance of 23" is controlled by the breaker point opening and this advance
is
obtained when the breaker point
opening is adjusted according
to
the
BREAKER
POINT
ADJUSTMENT
to its proper point opening. How-
ever, the advance timing is more accurately adjusted through the following procedures using a timing tester
as
shown in
Fig.
43.
Note: Refer to section
"4-1
1
IGNITION"
and
"4-13
CHECKS
and
CORRECTIONS."
6-3
-
1
ALIGNMENT MARK for TIMING ADJUST-
MENT (See Fig.
42.)
For
timing adjustment, the following alignment
marks are provided as shown in Fig.
42.
*
"M"
mark and line
on
the crankcase
*
"P"
mark and line on the flywheel cooling fan
Fig.
42
6-3-2 TIMING ADJUSTMENT with TIMING TESTER
1)
Disconnect the stop switch lead wires and the coil primary wire.
2)
Remove the blower housing from the engine.
3)
Connect the timing tester lead with red rubber cap to the coil primary wire and ground the lead with
black rubber cap to the crankcase. (See Fig. 43.)
While the points are open, the buzzer within tester remains ringing and when the points are closed, the
tester remains silent. (See Fig. 43.)
4)
Turn the flywheel slowly until alignment mark
on
the flywheel
is
in the line with alignment mark
on
the
carankcase.
Fig.
43
Fig.
44
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29
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