Snowmobile Polaris 120 PRO R (2013 year). Manual - part 12

49

ADULT SECTION

Maintenance

POLARIS Recommended Maintenance Program

To ensure many trouble-free miles of snowmobiling enjoyment, follow 
recommended regular maintenance and perform service checks as out-
lined in this manual. Record maintenance and service in the Mainte-
nance Log beginning on page 94.

The recommended maintenance schedule for your snowmobile calls for 
a service and maintenance inspection at 50 hours, at 100 hours and at 
150 hours. These inspections should be performed by a qualified service 
technician. 
All necessary replacement parts and labor incurred, with the exception 
of authorized warranty repairs, become the responsibility of the regis-
tered owner. If, during the course of the warranty period, part failures 
occur as a result of owner neglect in performing recommended regular 
maintenance, the cost of repairs are the responsibility of the owner. 

Personal safety is critical when attempting to service or make adjust-
ments to your snowmobile. If you're not familiar with safe service or 
adjustment procedures and the use of tools, or if you don't feel comfort-
able performing these tasks yourself, contact an authorized POLARIS 
dealer for service.

NOTICE: Hot components can cause damage to plastic. Always make sure the 

exhaust system and engine have cooled before tipping the snowmo-
bile on its side for service or inspection.

50

ADULT SECTION

Maintenance

Periodic Maintenance Chart

The following chart is a guide based on average riding conditions. You 
may need to increase frequency based on riding conditions. When 
inspection reveals the need for replacement parts, always use genuine 
POLARIS parts, available from your POLARIS dealer.

ITEM

SEE 

PAGE

DAILY

WEEKLY OR 

BEFORE 

EXTENDED 
PERIOD OF 

OPERATION

50

HRS

100

HRS

150

HRS

Test engine stop switch 

14, 20

X

Test throttle safety switch

27

X

Test tether switch

20

X

Test throttle lever 
operation

19, 26

X

Test brake lever 
operation

19

X

Check brake operation 
and adjustment

56

X

Check steering system 
operation

26

X

Check operation of 
headlight and taillight

31

X

Clean dust and debris 
from engine

--

X

Check ski skags, replace 
when worn to 1/2 original 
diameter

71

X

Inspect fuel lines, replace 
as needed

54

X

Check engine oil level

20, 61

X

Oil the drive chain

60

Every 10 Hrs

Check track tension, 
tighten if necessary

63

Every 10 Hrs

Grease the clutch

73

Every 15 Hrs

Change oil

62

At 20 Hrs

X

X

X

51

ADULT SECTION

Maintenance

Periodic Maintenance Chart

ITEM

SEE 

PAGE

DAILY

WEEKLY OR 

BEFORE 

EXTENDED 
PERIOD OF 

OPERATION

50

HRS

100

HRS

150

HRS

Check track alignment

65

X

Check track condition

67

X

Check drive chain 
tension

59

X

Check and tighten any 
loose suspension 
mounting bolts

72

X

Tighten ski saddle and 
spindle bolts if loose

--

X

Check front and rear 
limiter strap condition, 
tighten loose bolts

--

X

Check slider thickness, 
replace when worn (see 
dealer)

68

X

Tighten rear idler wheel 
bolts if loose

--

X

Check spark plug 
condition

52

X

Check for brake cable 
wear and adjustment

56

X

Throttle cable pivot slug

58

X

X

X

Lubricate steering post 
support bracket and pivot 
(aerosol)

--

X

X

X

Grease ski spindles

73

X

X

X

Lubricate ski bushings to 
spindle area

73

X

X

X

Grease lower steering 
post pivot

--

X

X

X

Grease rear suspension 
pivot shafts

72

X

X

X

Lubricate throttle cable 
and pivot

58

X

X

X

Lubricate choke slide and 
cable

58

X

X

X

Inspect exhaust pipe for 
cracks or damage

54

X

X

X

52

ADULT SECTION

Maintenance

Spark Plugs

A new engine can cause temporary spark plug fouling due to the preser-
vative added during the assembly process. Avoid prolonged idle speeds, 
which cause plug fouling and carbonization.

Refer to the specifications section beginning on page 80 for recom-
mended spark plug type and gap.

NOTICE: Using non-recommended spark plugs can result in serious engine 

damage. Always use the spark plugs recommended for your snowmo-
bile.

Spark plug condition is indicative of engine operation. The spark plug 
firing end condition should be read after the engine has been warmed up 
and the vehicle has been driven. Immediately check the spark plug for 
correct color.

Spark Plug Removal and Replacement
1. Stop the engine.

2. Remove the spark plug cap.

3. Using the special wrench provided in the tool pouch, rotate the 

spark plug counterclockwise to remove it.

4. Reverse the procedure for spark plug installation. Torque to 12-14 

ft. lbs. (16-19 Nm).

CAUTION

A hot exhaust system and engine can cause serious burns. Wear protective 
gloves when removing a spark plug for inspection.