Ski-Doo MX Z Iron Dog, Operator'S Manual

Page: 96 / 147

MAINTENANCE PROCEDURES
bient temperature, altitude or surface
condition may vary this critical engine
RPM thus affecting snowmobile effi-
ciency.
This adjustable drive pulley allows set-
ting maximum engine RPM to maintain
maximum power.
Calibration screws should be adjusted
so that actual maximum engine RPM
matches the maximum horsepower
RPM.
ENGINE
MAXIMUM
HORSEPOWER
RPM
600 HO E-TEC 8100 ± 100 RPM
800R E-TEC 7900 ± 100 RPM
NOTE: Use precision digital tachome-
ter for engine RPM adjustment.
NOTE: The adjustment has an effect
on high RPM only.
There are 6 positions numbered 1 to 6.
The calibration screws have 6 different
settings identified by numbers scribed
on their head.
The actual setting is the screw head
number aligned with the mark on the
pulley.
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PULLEY SETTING
1. Mark
2. Number
Each position modifies maximum en-
gine RPM by about 200 RPM.
Lower position numbers decrease en-
gine RPM in steps of 200 RPM and
higher position numbers increase it in
steps of 200 RPM.
Example:
Calibration screws initially set at posi-
tion 4 and changed to position 6 will
increase maximum engine RPM by
400 RPM.
Procedure
Loosen the lock nut just enough to get
the calibration screw head out of the
pulley and rotate to the desired posi-
tion. Do not completely remove the
lock nut.
Set all 3 calibration screws to the same
position.
Tighten lock nuts to 10 N•m ± 2 N•m
(89 lbf•
in ± 18 lbf• in ).
NOTICE
Do not completely re-
move calibration screw otherwise
internal washers will fall off. Al-
ways adjust all 3 calibration screws
and make sure they are all set to the
same position.
mmo2015-007-303_a
TYPICAL
1. Loosen just enough to permit rotating of
calibrate screw
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