Arctic Cat ATV 250 Utility 2009, Service Manual

Page: 82 / 129

5-2
Electrical System
This section has been organized into sub-sections
which show procedures for the complete servicing of
the Arctic Cat ATV electrical system.
„
NOTE: Some photographs and illustrations used
in this section are used for clarity purposes only
and are not designed to depict actual conditions.
SPECIAL TOOLS
A number of special tools must be available to the techni-
cian when performing service procedures in this section.
Refer to the current Special Tools Catalog for the appro-
priate tool description.
„
NOTE: Special tools are available from the Arctic
Cat Service Parts Department.
Specifications
RPM Limiter
„
NOTE: The ATV is equipped with a CDI unit that
retards ignition timing when maximum RPM is
approached. When the RPM limiter is activated, it
could be misinterpreted as a high-speed misfire.
Testing Electrical
Components
All of the electrical tests should be made using the
Fluke Model 73 Multimeter and when testing peak
voltage, the Peak Voltage Reading Adapter must be
used. If any other type of meter is used, readings may
vary due to internal circuitry. When troubleshooting a
specific component, always verify first that the fuse(s)
are good, that the bulb(s) are good, that the connec-
tions are clean and tight, that the battery is fully
charged, and that all appropriate switches are acti-
vated.
„
NOTE: For absolute accuracy, all tests should be
made at room temperature of approximately 68° F.
Electrical Connections
The electrical connections should be checked periodi-
cally for proper function. In case of an electrical fail-
ure, check fuses, connections (for tightness, corrosion,
damage), and/or bulbs.
Switches
Each time the ATV is used, switches should be
checked for proper operation. Use the following list
for reference.
A. Ignition switch — engine will start.
B. Emergency stop switch — engine will stop.
C. Reverse switch — reverse indicator light will
illuminate.
D. Hi/Lo switch — headlight high beam or low
beam will illuminate.
E. Brake switches — rear brakelight will illuminate.
Description p/n
Fluke Model 73 Multimeter 0644-191
MaxiClips 0744-041
Peak Voltage Reading Adapter 0644-307
Tachometer 0644-275
Timing Light 0644-296
IGNITION
Ignition Timing 5° BTDC (“F” mark) @1000
RPM
Spark Plug Type NGK DPR7EA-9
Spark Plug Gap 0.8-0.9 mm (0.032-0.036 in.)
Spark Plug Cap 4500-6150 ohms
Ignition Coil Resistance (primary)
(secondary)
2.4-3.0 ohms
(terminal to terminal)
12,300-16,600 ohms
(high tension - plug cap
removed - to ground)
Ignition Coil Peak (primary/CDI)
Voltage
9.6-16.4 DC volts
(black/white to green/gray)
MAGNETO
Magneto Coil Resistance (trigger)
(charging)
105-110 ohms
(blue/yellow to green/white)
Less than 1 ohm
(yellow to yellow)
Stator Coil Peak Voltage (trigger) 1.1-1.4 DC volts
(blue/yellow to green/white)
Magneto Output (approx) 220W @ 5000 RPM
Stator Coil Output (no load) 40-60 AC volts@3500 RPM
(yellow to yellow)
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