Snowmobile Polaris 600 IQ Racer (2015 year). Manual - part 25

103

TROUBLESHOOTING

Engine Troubleshooting

Problem

Probable Cause

Solution

Engine turns but fails 
to start

Faulty ignition

• Install new spark plug(s). If engine 

still fails to start, check for spark. If 
there's no spark, SEE YOUR 
DEALER.

No fuel to engine

• Make sure the fuel valve is on.
• Make sure the fuel tank contains 

fuel.

• Ice may be in the fuel line, filter or 

pump. Add isopropyl alcohol to the 
fuel system.

Flooded engine 
(normal situation 
caused by too much 
choking)

• Hold throttle open, crank engine 

several times (may need to dry or 
change plug(s)

Poor engine 
compression

• Mixture is too lean. A main jet that 

is too small will cause seizure 
resulting in loss of power. This 
indicates a major engine problem 
that must be repaired before 
operating. SEE YOUR DEALER.

Engine lacks power

Fouled or defective 
spark plug(s)

• Replace the plug(s).

Fuel filter (loss of 
high RPM power)

• SEE YOUR DEALER.

Incorrect clutching

• SEE YOUR DEALER.

Carburetor and fuel 
pump

• There's no adjustment to change 

power output. SEE YOUR 
DEALER.

Engine continually 
backfires

Faulty plug(s)

• Change plug(s).

Fuel System

• Dirt or ice may be in the fuel system 

(deicer should be added to non-
ethanol fuel at all times for 
assurance against fuel line icing).

Engine backfires but 
fails to start

Spark plug wires 
may be on wrong 
cylinder

• Reinstall spark plug wires to the 

corresponding cylinder.

104

TROUBLESHOOTING

Suspension Troubleshooting

Problem

Solution

Rear suspension bot-
toms too easily 

• Adjust torsion spring preload (see page 33).
• Increase rear shock compression damping by turning screw 

clockwise.

• Increase torsion spring wire diameter (see your dealer).

Rides too stiff in rear

• Check for binding suspension shafts and grease all pivot 

points.

• Adjust torsion spring preload (see page 33).
• Decrease rear shock compression valving by turning screw 

counter-clockwise (if Indy Select shock)

• Change to lighter valving (if FOX shock)
• Check track tension (see page 86).

Too much weight 
transfer when climb-
ing

• Adjust torsion spring preload (see page 33). 
• Adjust limiter straps.

Too little weight 
transfer when climb-
ing

• Adjust torsion spring preload (see page 33). 
• Adjust limiter straps.

Machine darts from 
side to side

• See your dealer for ski alignment inspection.
• Make sure spindles and all steering components turn freely.
• Check for excessive play in steering assembly (see your 

dealer).

• Ensure skags are straight on skis.
• Adjust torsion spring preload (see page 33).
• Check rail slide/replace if worn (see page 91).
• Reduce ski pressure: Reduce IFS spring preload or reduce 

rear torsion spring preload.

105

TROUBLESHOOTING

Suspension Troubleshooting

Problem

Solution

Front end pushes

• Check for worn skags.
• Adjust torsion spring preload (see page 33).
• Check for binding front suspension shafts and steering 

components, grease all pivot points (elevate front of 
machine).

• Increase IFS preload (if equipped) (see page 28).
• Install single skag (see your dealer).
• Rotate RRSS to high position (see page 38).

Steering is heavy

• Make sure spindles and all steering components turn freely.
• See your dealer for ski alignment inspection.
• Check skags and skis for damage.
• Reduce ski pressure: Increase front track spring preload, 

reduce IFS spring preload by adjusting cam, reduce rear 
torsion spring preload (see page 33).

Setting up for deep 
snow operation

• Change worn rail slide.

106

TROUBLESHOOTING

Drive Belt Troubleshooting

Belt Wear/Burn Diagnosis

Causes

Solutions

Driving at low RPM

• Drive at higher RPMs. Gear the machine down. Check 

belt deflection.

Insufficient warm-up

• Warm the engine at least five minutes. Take the drive 

belt off the machine in extremely cold weather and 
warm it up. Break machine loose from the snow.

Towing at low RPM

• Do not tow in deep snow. Use fast, aggressive throttle 

to engage clutch.

Riding with high RPM 
and slow speed (8000 
RPM/10 MPH)

• Lower the gear ratio. Remove windage plates from the 

clutch. Reduce RPM. Avoid riding in high ambient 
temperatures. Check for snow ingestion.

Ice and snow build-up 
between track and tunnel

• Warm the engine at least five minutes. Take the drive 

belt off the machine in extremely cold weather and 
warm it up. Break machine loose from the snow.

Poor engine performance

• Check for carburetor and choke synchronization, fouled 

plugs, debris in the carburetor(s) and water, ice or dirt 
in the fuel tank or fuel line.

Loading machines onto 
trailers

• Skis may gouge into trailers and prevent the drivetrain 

from spinning properly. Use enough speed to drive the 
machine completely onto the trailer. Push and pull it to 
finish loading if necessary.

Clutch malfunction

• Inspect clutch components. See your dealer.

Slow, easy clutch 
engagement

• Use fast, aggressive throttle to engage clutch.