Polaris 550 Indy 144 Owner's Manual page 105

Engine Troubleshooting
Problem
Engine turns but fails
to start
Engine lacks power
Engine continually
backfires
Engine requires
more than normal
pulls to start
Probable Cause Solution
Faulty ignition
No fuel to engine
Flooded engine (too
much choke used)
Poor engine
compression
Fouled or defective
spark plug(s)
Fuel filter (loss of
high RPM power)
Plugged fuel filter or
tank pick-up sock
Incorrect clutching
Carburetor and fuel
pump
Faulty plug(s)
Carburetor / Fuel
System
Incorrect throttle
freeplay or faulty
switch
Poor fuel
Not enough fuel
getting to engine
TROUBLESHOOTING
• Install new spark plug(s). If engine
still fails to start, check for spark. If
there's no spark, SEE YOUR
DEALER.
• 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.
• Hold throttle open, crank engine
several times (may be necessary to
change plug(s).
• This indicates a major engine
problem that must be repaired before
operating. SEE YOUR DEALER.
• Replace the plug(s).
• SEE YOUR DEALER.
• SEE YOUR DEALER.
• SEE YOUR DEALER.
• SEE YOUR DEALER.
• Change plug(s).
• Dirt or ice may be in the fuel system
(add deicer to non-ethanol fuel at all
times to prevent icing).
• SEE YOUR DEALER.
• Replace with fresh winter fuel.
• SEE YOUR DEALER.
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