Arctic Cat Pantera 1978 - Magneto CDI Nippon Denso 150 W; High Voltage Output Test

3. Make a reference mark on the PTO cylinder
and a corresponding mark on the drive
clutch. These marks will be used to check the
ignition timing.
4. Remove the dial indicator and install the
spark plug.
5. Start the engine. Check the timing with a
timing light. The timing marks must align
when the engine is at 6000 rpm.
6.
To change the timing, remove the recoil
starter and the starter pulley; then loosen the
two hex key cap screws securing the mag-
neto baseplate to the magneto housing.
7. Rotate the baseplate clockwise to retard the
timing or counterclockwise to advance the
ignition timing.
8. Tighten the magneto baseplate mounting
screws and recheck timing.
Fig. 8-31
0725-397
Magneto CDI
Nippon Denso 150W
Usage: Pantera FC
Panther
Cheetah
The new 150 watt Nippon Denso COl ignition is
used on all 1978 fan
cooled engines. With the
increased output from this new lighting system,
customers will now have better lights at slow trail
143
riding speeds, plus improved battery charging
capability when the snowmobile is equipped with
electric start.
Fig. 8-32
.~.
• .\?
0725-492
In Fig. 8-32, the components of this new system
are shown. All of these components must be in
excellent working order to tbchieve top engine
performance. The coil ring has 12 coils located
around its outer circumference. Eight of these
coils are used in making up the 150 watt lighting
system, three are used for the ignition system
(charge coils) and one is used to support internal
wires.
If
anyone of the 12 coils should fail, the coil ring
will have to be replaced as a complete unit. To Af\)
troubleshoot this ignition, use the model 1-L 'l)
tester and the procedure listed below. The first
test to perform in troubleshooting is the high
voltage test.
High Voltage Output Test
Before the ignition can be tested, first remove the
resistor-type spark plug which has an "R"
stamped on its ceramic sleeve, and also the
resistor-type spark plug wire cap from the
number 2 cylinder. In place of these two items,
substitute an automotive metal spark plug wire
cap and a non-resistor type spark plug of the
same heat range. Be sure to gap the plug at 0.5
mm or 0.020
of-an-inch. Failure to remove these
two resistor-type items will result in inaccurate
readings.
1. Install a non-resistor type plug in No. 2
cylinder next to flywheel. Attach NO.2 spark
plug wire with metal connector to the spark
plug. Next, install the NO.1 spark plug and
attach the high tension lead. Never crank the
engine over with either of the spark plug
wires not being grounded or attached to the
spark plugs. Damage to the coil or COl unit
will result.