Snowmobile Arctic Cat (2004 year). Instruction - part 69

5-43

5

2. Install the flex-drive shaft onto the starter motor

and secure with the two Allen-head screws.

3. Place the starter motor into the upper bracket; then

secure with existing hardware. Tighten securely.

Troubleshooting

Electric Start

4. Attach the red positive cabe to the positive stud

terminal and secure with a nut and washers. While
tightening the nust, hold the cable in position so it
is parallel with the starter.

Ignition Timing

„

NOTE: Ignition timing can be checked and/or

verified on all snowmobile engines; however,
ignition timing can be adjusted only on certain
models. Refer to the following Ignition Timing
Specifications sub-section for information on
models which are adjustable and on models for
which no timing adjustment is required.

CHECKING

1. Connect a timing light to the MAG-side spark plug

lead.

2. Using a shielded safety stand, raise the rear of the

snowmobile off the floor and start the engine.
Gradually increase the engine speed to the
specified RPM; the pointer should align with the
proper timing mark on the flywheel.

3. If timing is not correct, adjust the ignition timing.

ADJUSTING

1. Remove the recoil starter, starter pulley, and

flywheel.

2. Loosen the two screws securing the stator plate

and rotate the stator plate in the proper direction to
attain correct timing.

„

NOTE: Rotate the stator plate clockwise to retard

the timing or counterclockwise to advance the tim-
ing. The stamped marks on the stator plate at the
upper socket-head cap screw mounting hole can
be used for timing.

3. Tighten the screws securing the stator plate.

4. Install the flywheel, starter pulley, and recoil

starter.

5. Recheck timing for accuracy and adjust if

necessary.

! CAUTION

Check the cable installation to make sure it isn’t
near any moving parts or against any sharp
edges.

Problem: Hot or Smoking Wires

Condition

Remedy

1. System wired incorrectly

1. Check wiring against wiring diagram

Problem: Starter Does Not Turn Over

Condition

Remedy

1. Battery discharged
2. Connection loose
3. Grounding improper
4. Fuse blown - not installed

1. Check/charge the battery
2. Check tightness of all connections
3. Check ground connections
4. Check - replace fuse

5-44

Ignition Timing 

Specifications

Table of Contents

370 cc ................................................................... 5-44
440 cc ................................................................... 5-45
500 cc w/o APV..................................................... 5-45
500 cc w/APV........................................................ 5-46
550 cc ................................................................... 5-46
570 cc ................................................................... 5-47
600 cc “Laydown” Carb ......................................... 5-47
600 cc “Laydown” EFI ........................................... 5-48
600 cc STD ........................................................... 5-48
700 cc Carb........................................................... 5-49
700 cc EFI ............................................................. 5-49
800 cc ................................................................... 5-50
900 cc Carb........................................................... 5-50
900 cc EFI ............................................................. 5-51

370 cc

738-950A

„

NOTE: For 6000 RPM timing purposes

on the 370 cc, use a dial indicator
and scribe a mark on the flywheel
for 13° BTDC.

Ignition Timing - Engine Warm 
BTDC - 18°/2000 RPM - 2.012 mm (0.079 in.)
BTDC - 13°/6000 RPM - 1.056 mm (0.042 in.)

5-45

5

440 cc

738-950A

500 cc w/o APV

738-959A

„

NOTE: For 6000 RPM timing purposes

on the 440 cc, use a dial indicator
and scribe a mark on the flywheel
for 13° BTDC.

Ignition Timing - Engine Warm 
BTDC - 18°/2000 RPM - 2.012 mm (0.079 in.)
BTDC - 13°/6000 RPM - 1.056 mm (0.042 in.)

„

NOTE: For timing verification on

the 500 cc w/o APV, use a dial
indicator and scribe a mark on
the flywheel for 25° BTDC.

Ignition Timing - Engine Warm 
BTDC - 25°/1800 RPM - 3.692 mm (0.145 in.)

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500 cc w/APV

738-207A

550 cc

738-955A

„

NOTE: For timing verification

on the 500 cc w/APV, use a dial
indicator and scribe a mark on
the flywheel for 30° BTDC.

Ignition Timing - Engine Warm 
BTDC - 30°/2000 RPM - 5.258 mm (0.207 in.)

„

NOTE: For 2000 RPM timing purposes

on the 550 cc, use a dial indicator and
scribe a mark on the flywheel for 33°
BTDC.

BTDC - 33°/2000 RPM - 6.556 mm (0.258 in.)

Ignition Timing - Engine Warm)

BTDC - 24°/6000 RPM - 3.540 mm (0.139 in.)