Arctic Cat Cougar Service Manual page 121

LUBRICATION, MAINTENANCE AND TUNE-UP
111
3. Remove the cover from the cooling fan so that
the flywheel timing mark and the crankcase
mark can be seen (Figure 70).
4. Install and position a dial indicator as follows:
a. Screw the extension onto a dial indicator
and insert the dial indicator into the adapter
(Figure 57).
b. Screw the dial indicator adaptor into the
cylinder 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). Slide the indicator far
enough into the holder to obtain a reading.
d. Lightly tighten the set screw on the dial
indicator 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 gauge by
aligning the zero with the dial (Figure 58).
f. Tighten the set screw on the dial indicator
adaptor securely.
5. Rotate the crankshaft clockwise (viewed
from the right -hand side) until the gauge needle
has made approximately three revolutions. Care-
fully tum the crankshaft clockwise until the
gauge indicates that the piston is the correct
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 flywheel timing marks through the
opening (Figure 70). The timing mark on the
flywheel should line up with the arrow (A, Fig-
ure 71). 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.
Dynamic timing check
NOTE
The ignition timing marks located on the
engine flywheel of air-cooled engines
may be very difficult to view with the
engine installed. A wire, or similar,
pointer can be securely attached to the
engine near the drive pulley, then a tem-
porary timing mark can be scribed on
the pulley for checking the timing with
the engine running. Use the following
dynamic timing check to locate the
crankshaft at the correct timing position,
then scribe the temporary mark on the
stationary pulley in line with the pointer.
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.