Polaris 850 PRO-RMK 155 2.6" QD 2021, Manual

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2.6
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
VEHICLE BREAK-IN
ENGINE BREAK-IN PERIOD
IMPORTANT
Engines equipped with an electronic oil pump do not
require initial fuel premix.
Excessive heat build-up during the first three hours of
operation will damage close-fitted engine parts. Do not
operate at full throttle or high speeds for extended
periods during the first three hours of use. Vary the
throttle openings and vehicle speeds to reduce friction on
all close-fitting machined parts, allowing them to break in
slowly without damage.
NOTICE
The engine management system utilizes both a fuel
injector break-in period and oil pump enrichment
program. The duration of these break-in programs are
independent of each other and are timed-out based on
engine run-time. Regardless of these automatic engine
break-in / enrichment features, the following engine
break-in procedures must be performed when the
engine is new or overhauled.
IMPORTANT
Never mix brands of oil. Serious chemical reactions can
cause injection system blockage, resulting in serious
engine damage. Oils may also be incompatible and the
result could be sludge formation, filter blockage, and
reduced cold weather flow rates. All Polaris oils are
compatible with each other.
Drive with extra caution during the break-in period.
Perform regular checks on fluid levels, lines, and all other
important areas of the snowmobile.
Always check and fill the oil bottle when refueling.
IMPORTANT
Serious engine damage can occur without the proper
lubrication. Check the oil bottle level often during the
first tank of fuel. If the oil level doesn't go down, inspect
oil injection system.
NOTICE
For rebuilt engines, reset the Oil Pump Enrichment
Mode Timer.
850 BREAK-IN PERIODS
BREAK-IN
FUNCTION
ENGINE RUN
TIME
DURATION
DESCRIPTION
Fuel Injectors
2 hours *
2% additional
fuel
Oil Pump
Enrichment
Period
10 Hours *
15% additional
enriched oil
supply to engine
* = Total engine run time above 3,500 RPM
If the vehicle has MY19, MY19 update or MY20
calibrations the RPM is 5500 RPM.
DRIVE BELT BREAK-IN
The break-in period for a new drive belt is 30 miles (48
km). During this time, vary the throttle position under
50% and limit full throttle use.
Always take time to warm up the belt and driveline prior
to operating the snowmobile. Free the track and skis
from the ground before engaging throttle.
MAINTENANCE