Arctic Cat 500 4x4, Operator'S Manual

Page: 42 / 76

���������� ����������� �������� �����������������
������ ��� ��
��������������� ��
������� ��� � ��� ����������
���������� ������������
Page 40
Spark plug (except 700 Diesel)
The ATV comes equipped with a
specified spark plug (see techni-
cal data). A light brown insulator
indicates that the plug is correct.
A white or dark insulator indicates
that the engine may need to be ser-
viced or the carburetor may need
to be adjusted. Take the ATV to an
authorized Arctic Cat ATV dealer.
q NOTE
If the spark plug fails prematurely
due to cold outside temperature,
low speed or low RPM, please con-
tact your Arctic Cat ATV dealer.
Before removing the spark plug, be
sure to clean the area around the
spark plug. If you do not, dirt could
enter engine when removing or in-
stalling the spark plug.
Adjust the gap on the 500 and 650
H1 to 0.7-0.8mm for proper ignition.
Use a feeler gauge to check the
gap.
When installing the spark plug, be
sure to tighten it securely. A new
spark plug should be tightened 1⁄2
turn once the washer contacts the
cylinder head. A used plug should
be tightened only 1/8 – 1⁄4 turn.
Engine Idle RPM Adjustment
(except 700 Diesel)
To properly adjust the idle, a tacho-
meter is necessary. If one is not
available, take the ATV to an autho-
rized Arctic Cat ATV dealer. (Diesel
vehicles must always be taken to
the dealer!)
To adjust idle RPM:
1. Start the engine and warm it up
to normal operating temperature.
2. Turn the throttle stop screw in
our out until the engine idles at the
recommended RPM.
Engine idle RPM
500/650 H1 1250-1350 turns/min