Polaris 550 IQ LXT Offroad Vehicle User Manual


 
105
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.
Use the choke.
Make sure fuel tank contains fuel.
Ice may be in fuel line, filter or
pump. Add isopropyl alcohol to fuel
system. On the standard POLARIS
carburetor, the choke will not func-
tion with the throttle depressed.
Flooded engine (too
much choke used)
Hold throttle open, crank engine
several times (may be necessary to
change plug(s).
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)
Check fuel filter flow. Disconnect
hose and drain 1/2 cup. Fuel flow
should be steady and encompass the
entire diameter of fuel line. If not,
replace filter.
Incorrect clutching SEE YOUR DEALER.
Carburetor and fuel
pump
SEE YOUR DEALER.
Engine continually
backfires
Faulty plug(s) Change plug(s).
Carburetor / Fuel
System
Dirt or ice may be in the fuel system
(add deicer to non-ethanol fuel at all
times to prevent icing).
Incorrect throttle
freeplay or faulty
switch
SEE YOUR DEALER.