Break-In Period

Content Source: 2020 PRO-RMK / RMK ASSAULT / SKS 155 Owner’s Manual (9929772 R02) > Operation Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

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Break-In Period

Engine Break-In

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 AXYS 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.

caution

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.

caution

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.

Engine Break-In Periods

600/800 Models

Break-In Function	Engine Run Time Duration	Description
Fuel Injectors	2 hours	Additional fuel
600 AXYS Engine Oil Pump Enrichment Period	5 Hours	Enriched oil supply to engine
800 AXYS Engine Oil Pump Enrichment Period	18 Hours	Enriched oil supply to engine
* = Total engine run time above 5,500 RPM

850 Models

Break-In Function	Engine Run Time Duration	Description
Fuel Injectors	2 hours *	Additional fuel
Oil Pump Enrichment Period	10 Hours *	Enriched oil supply to engine
* = Total engine run time above 5,500 RPM

Oil Injection System

Always check and fill the oil bottle when refueling.

NOTICE

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, contact your dealer or equivalent person immediately.

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.
New drive belts should be washed with warm, soapy water and allowed to air dry prior to 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.

QUICKDRIVE Belt Break-In

The break-in period for a new QUICKDRIVE belt is 100 miles (160 km). During the 100 miles of belt break-in, the rider will hear a sound made by the drive system. After the break-in period, the sound will become similar to that of a traditional chaincase.
Improper track tension can result in track ratcheting, which will affect QUICKDRIVE belt durability. Always maintain proper track tension.
During the break-in period, this belt sheds a fiber-type material in and around the drive system. Use a dry shop towel to clean the residue.
Stop occasionally and allow the snowmobile to cool after high throttle/high track load events. This will help the QUICKDRIVE belt achieve maximum performance and it will also break in the engine, drive belt and sprockets properly.
On-trail break-in should be performed at speeds no more than 50 MPH (80 km/h).
Always be cautious when jumping and landing a snowmobile. Avoid “power-on” landings. Damage caused to any component due to improper use or abuse is not covered by warranty.