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General Information
Control Locations
0746-486
Engine Break-In
The engine (when new or rebuilt) requires a short
break-in period before the engine is subjected to heavy
load conditions.
During the break-in period, a maximum of 1/2 throttle
is recommended; however, brief full-throttle accelera-
tions and variations in driving speeds contribute to
good engine break-in.
Following the break-in period, the carburetor main jets
may need to be changed depending on the operating
altitude and temperature (see Selecting Carburetor
Main Jets section of this manual).
Diagnostic Codes/Check Engine
Light
NOTE: If the coolant temperature is at or above
80° C (176° F), the high temp light will flash a warn-
ing (alert). If the coolant temperature is at or above
93° C (200° F), the high temp light will cease flash-
ing and will remain constantly illuminated.
NOTE: At this point, the operator should take
precautionary measures such as changing to
loose snow terrain and/or checking coolant level.
Ignition Timing Adjustment Dial
RA016A
RA017A
The Sno Pro 600 comes equipped with a remote adjust-
able ignition timing feature. The dial is located on the
upper middle spar. The adjusting procedure is simplified.
The adjustable timing switch is a simple adjustment dial
with an indexing line. This line will correspond, when
turned, with 7 different settings. As indicated on the dial,
the settings are 0, which represents standard ignition tim-
ing, +1, +2, +3, plus meaning ignition timing advance of
1 or 2 or 3 degrees, and -1, -2, -3, minus meaning retard
of ignition timing of 1 or 2 or 3 degrees.
When an ignition timing change is desired, start the
engine and simply turn the dial to the desired setting.
Example, if 2 degrees of advance is required, turn dial
to +2 and the timing change is set. This change can be
made at any engine RPM. If the timing adjustment dial
is unplugged, ignition timing remains at last setting
prior to unplugging.
Testing Ignition Timing Rotary
Select Switch
1. Disconnect the switch from the CDI harness.
2. Using a digital multimeter with the leads con-
nected to the switch leads, rotate the switch to
each of the seven positions observing (and record-
ing) the resistance reading.
Number of Flashes
Trouble
1 (Check Engine Light)
Open or short circuit in throttle position
sensor.
2 (Check Engine Light)
Open or short circuit in water
temperature sensor.
6 (Check Engine Light)
Failure in exhaust valve system.
7 (Check Engine Light)
Exhaust Temperature Sensor failure.
Steady Flash
(High Temp Light)
Coolant Temperature Above 80° C
(176° F).
Constant On
(High Temp Light)
Coolant Temperature Above 93° C
(200° F).
