Important Engine Service Notes - Polaris 850 PRO-RMK 155 2020 Manual

ENGINE / COOLING / EXHAUST

IMPORTANT ENGINE SERVICE NOTES

The Oil Pump Enrichment Mode Timer MUST be reset
using Digital Wrench whenever the following engine
service actions are completed:
• Engine rebuild
• New cylinder installed
• New pistons / rings installed
• New crankcase installed
• New crankshaft / crank bearings installed
• New water pump cross shaft installed
To reset the Oil Pump Enrichment Mode Timer, see Oil
Pump Enrichment Mode Timer Reset page 1.106.
ENGINE RUN
BREAK-IN
TIME DESCRIPTION
FUNCTION
DURATION
2% additional
Fuel Injectors
2 hours *
fuel
15% additional
Oil Pump
enriched oil
Enrichment 10 Hours *
supply to engine
Period
* = Total engine run time above 3,500 RPM
If the vehicle has MY19, MY19 update or MY20
calibrations the RPM is 5500 RPM.
The Electronic Oil Pump Prime procedure MUST be
performed using Digital Wrench whenever the following
engine service actions are completed and the engine has
been reinstalled back into the chassis:
• Engine rebuild
• New cylinder installed
• New pistons / rings installed
• New crankcase installed
• New crankshaft / crank bearings installed
• New water pump cross shaft installed
• Oil supply hoses to engine have 1 inch (2.54 cm) or
larger air bubbles
• Oil pump is replaced
NOTICE
Perform the Electronic Oil Pump Prime procedure until
ALL of the air is purged from the lines and then prime at
least two additional times to push oil into bearings.
To perform the Electronic Oil Pump Prime procedure, see
Electronic Oil Pump Prime Procedure page 1.111.
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
3.6
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