Dynamic Timing Check - Arctic Cat Cougar Service Manual

106
b. Screw the dial indicator adaptor into the cyl-
inder head on the MAG side. Do not lock
the dial indicator in the adapter at this time.
c. Rotate the flywheel by turning the primary
sheave until the dial indicator rises all the
way up in its holder (piston is approaching
top dead center). Then slide the indicator far
enough into the holder to obtain a reading.
d. Lightly tighten the set screw on the dial in-
dicator adaptor to secure the dial gauge.
e. Rotate the flywheel until the dial on the
gauge stops and reverses direction. This is
top dead center. Zero the dial guage by
aligning the zero with the dial (Figure 58).
f. Tighten the set screw on the dial indicator
adaptor securely.
5. Rotate the crankshaft counterclockwise
(viewed fron the right side) until the gauge nee-
dle has made approximately three revolutions.
Then carefully tum the crankshaft clockwise un-
til the gauge indicates that the piston is the cor-
rect distance before top dead center as indicated
in Table 9.
NOTE
There may be more than one mark on the
flywheel. To identifY the correct mark to
use when peiforming dynamic timing,
apply chalk or paint to the correct mark
6. View the timing marks through the hole in
the crankcase (Figure 59). The timing mark
should line up with the pointer. If not, perform
the following:
a. Scribe a new mark on the flywheel that
aligns with the crankcase pointer.
b. Repeat the timing procedure to check the
accuracy of the new mark.
c. This mark will be used as the reference
when using the timing light. Apply paint
over the scribe mark if necessary to make
the mark more visible.
7. Remove the gauge and adapter. Install the
spark plugs and connect the high-tension leads.
CHAPTER THREE
Dynamic timing check
1. Open the hood.
2. Perform the Static Timing Check in this chap-
ter to make sure the flywheel is correctly in-
stalled and to identify the correct timing mark.
22° BTDC
20° BTDC
18° BTDC-
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- 24°8TDC
- 26° BTDC
-28°8TDC
____ 30° BTDC
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