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.
• Use the choke.
• Make sure 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
function 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
compression
• 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.
Plugged fuel filter or
tank pick-up sock
• SEE YOUR DEALER.
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.
Engine requires
more than normal
pulls to start
Poor fuel • Replace with fresh winter fuel.
Not enough fuel
getting to engine
• SEE YOUR DEALER.
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