Snowmobile Polaris 600 IQ LXT (2015 year). Manual - part 30

123

TROUBLESHOOTING

Engine Troubleshooting

Unless you have experience and training in two-cycle engine repair, 
see your dealer if technical problems arise.

Problem

Probable Cause

Solution

Erratic engine oper-
ating RPM during 
acceleration or load 
variations

Drive clutch binding

• SEE YOUR DEALER.

Driven clutch mal-
function

• SEE YOUR DEALER.

Harsh drive clutch 
engagement

Drive belt worn or 
too narrow

• Replace the drive belt.

Excessive belt/
sheave clearance

• SEE YOUR DEALER.

Drive belt turns over

Wrong belt for appli-
cation

• Replace the drive belt.

Clutch alignment out 
of spec

• SEE YOUR DEALER.

Engine mount bro-
ken or loose

• Inspect and replace. SEE YOUR 

DEALER.

Machine fails to 
move

Clutch jammed

• Check for twisted belt or broken 

spring. SEE YOUR DEALER.

Track jammed

• Foreign object may be caught or the 

rail slide melted to the track clips 
due to lack of lubrication.

• Track may be iced up or frozen to 

the ground. 

Chaincase sprocket 
or chain jammed or 
broken

• Chain is loose or broken or chain 

tightener is loose. SEE YOUR 
DEALER.

124

TROUBLESHOOTING

Engine Troubleshooting

Problem

Probable Cause

Solution

Noise in drive sys-
tem

Broken drive clutch 
components

• SEE YOUR DEALER.

Bearing failure/ 
chaincase, jackshaft, 
or front drive shaft

• SEE YOUR DEALER.

Drive belt surface 
flat spots

• Inspect and replace as needed.

Drive chain loose

• Inspect and adjust (or replace).

Drive chain worn, 
sprocket teeth bro-
ken

• SEE YOUR DEALER.

Poor low RPM per-
formance

Worn drive belt

• Inspect and replace as needed.

Excessive belt/
sheave clearance

• SEE YOUR DEALER.

Loose torque stop

• Inspect and adjust.

Sticky clutch

• SEE YOUR DEALER.

Poor fuel quality

• Use 87-91 octane fuel (or higher).

Engine doesn't turn

Seized engine

• SEE YOUR DEALER. Seizure is a 

result of poor lubrication, 
inadequate fuel supply, broken parts 
or improper cooling.

Hydrostatic lock 

• Fuel may have entered the crankcase 

while the vehicle was standing or 
being transported. SEE YOUR 
DEALER to correct the cause. Drain 
plug(s) are located on the lower 
crankcase for emergency draining.

125

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.

Poor engine com-
pression

• Mixture is too lean. A main jet that 

is too small will cause seizure result-
ing 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.

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).

Incorrect throttle 
freeplay or faulty 
switch

• SEE YOUR DEALER.

Engine requires 
more than normal 
pulls to start

Poor fuel

• Replace with fresh winter fuel.

Not enough fuel get-
ting to engine

• SEE YOUR DEALER.

Engine backfires but 
fails to start

Spark plug wires 
may be on wrong 
cylinder

• Reinstall spark plug wires to the 

corresponding cylinder.

126

TROUBLESHOOTING

IQ Comfort Suspension Troubleshooting

Problem

Solution

Rear suspension bot-
toms too easily 

• Adjust torsion spring preload to achieve proper static sag 

(see page 54).

• Change torsion spring to stiffer optional spring (see your 

dealer).

• Rotate RRSS to higher position (see page 59).

Rides too stiff in rear

• Check for binding suspension shafts and grease all pivot 

points.

• Adjust torsion spring preload to achieve proper static sag 

(see page 54).

• Change torsion spring to softer optional spring (see your 

dealer).

• Check track tension (see page 110).
• Rotate RRSS to lower position (see page 59).

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.
• Set static sag (see page 54).
• Check rail slide/replace if worn (see page 112).
• Install Accu-Trak dual skags (see your dealer).

Front end pushes

• Check for worn skags.
• Check for binding front suspension shafts and steering 

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

• Set static sag (see page 54).
• Install single skag (see your dealer).
• Increase IFS preload (if equipped) (see page 51).
• Rotate RRSS to higher position (see page 59).

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.
• Set static sag (see page 54).