Snowmobile Polaris FS IQ Widetrak (2013 year). Manual - part 24

98

MAINTENANCE

Spark Plugs

Normal Spark Plug

The normal insulator tip is gray, tan or light brown. There will be few 
combustion deposits. The electrodes are not burned or eroded. This indi-
cates the proper type and heat range for the engine and the service.

Tip: The tip should not be white. A white insulator tip indicates overheating, 

caused by use of an improper spark plug or incorrect throttle body adjust-
ments.

Wet Fouled Spark Plug

The wet fouled insulator tip is black. A damp oil film covers the firing 
end. There may be a carbon layer over the entire nose. Generally, the 
electrodes are not worn. General causes of fouling are excessive oil or 
rich fuel mixture.

99

MAINTENANCE

Intake Filters

The intake foam filter limits snow 
ingestion into the intake system. 
When operating in loose powder 
snow, check the top of the foam 
filter periodically to remove any 
accumulation of snow.

Fuel Injectors

All fuel injector service must be performed by an authorized POLARIS 
dealer. Do not attempt to clean or service the fuel injectors.

Fuel Pump

All fuel pump service must be performed by an authorized POLARIS 
dealer. Do not attempt to service the fuel pump.

Fuel Filter

See your POLARIS dealer for replacement of the fuel filter at the inter-
vals outlined in the Periodic Maintenance Table beginning on page 80.

Contaminated or poor quality fuel will shorten the life of the fuel filter 
and result in poor engine performance. Always store fuel in clean fuel 
containers. If low fuel pressure or reduced engine performance occurs 
between the recommended fuel filter service intervals, the filter may 
need replacement. See your dealer.

Fuel Lines

Inspect the fuel lines regularly for signs of deterioration or damage. 
Always check fuel line condition after periods of storage. Normal dete-
rioration from weather and fuel compounds may occur. Replace worn or 
damaged fuel lines promptly.

NOTICE: Kinking the fuel lines or using a pliers or similar tools to remove fuel 

lines may cause damage to the lines. If a fuel line has been damaged 
or kinked, replace it promptly.

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100

MAINTENANCE

Alternator Belt Inspection

Inspect the alternator belt condition and tension before each ride.

1. Stop the engine.

2. Open the hood.

3. Inspect the belt for wear, 

cracks or other damage. If the 
belt is worn or damaged, 
install a new belt.

4. Grasp the alternator belt and 

attempt to twist it. 

5. If the belt rotates 1/4 turn (90°) or more (as shown), tighten the belt 

or install a new belt.

Foam Oil Breather Filter

Clean or replace the breather element at each engine oil change. Inspect 
the foam oil breather element any time the snowmobile has been tipped 
onto its left side. Clean the element if oil is present. See page 92.

101

MAINTENANCE

Exhaust System

Check the exhaust system for wear or damage at the intervals outlined in 
the Periodic Maintenance Table beginning on page 80.

CAUTION! Hot exhaust system parts can cause burns. Allow adequate time for 
the exhaust system to cool. Never perform this procedure with the engine 
running.

1. Allow the engine and exhaust system to cool completely.

2. Open the hood.

3. Inspect the muffler and pipes for cracks or damage. Check for weak 

or missing retaining springs or damper/support grommets.

4. Replace any damaged or missing components.

5. Clean the plastic surfaces next to the muffler with aerosol Carbure-

tor and Throttle Body Cleaner. See page 133 for the part numbers of 
POLARIS products.

6. Close the hood.