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TROUBLESHOOTING
Engine Troubleshooting
Problem Probable Cause Solution
Engine turns
but fails to start
Faulty ignition Remove spark plug(s) and replace with
new plug(s). If engine still fails to start,
check for spark; if no spark SEE YOUR
DEALER.
No fuel to engine
Make sure the fuel valve is “ON”. Check
tank level and fill up with correct fuel.
Ice in fuel line, filter, or pump. On the
standard Polaris carburetor, the choke will
not function with the throttle depressed.
See second item under “Probable Cause” of
“Engine continually backfires”.
Flooded engine
(normal situation
caused by too much
choking)
Hold throttle open, crank engine several
times (may be necessary to change plug(s),
however, the plug(s) may operate satisfac-
torily when dried).
Poor engine
compression
Running a mixture too lean (too small main
jet will cause seizure resulting in loss of
power). SEE YOUR DEALER. This indi-
cates a major engine problem that must be
repaired before engine is run.
Engine lacks
power
Fouled or defective
spark plug(s)
Change plug(s).
Fuel filter (loss of
high RPM power)
Check fuel filter flow . Disconnect hose and
drain about 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
There’s no adjustment to change power
output. SEE YOUR DEALER.
Engine
t
i
l
l
Faulty plug(s) Change plug(s).
continually
backfires
Carburetor Dirt or ice may be in fuel system. SEE
YOUR DEALER. (Deicer/isopropyl
should be added to non-ethanol fuel at all
times for assurance against fuel line icing.)
Engine requires
more than
normal pulls to
start
Poor gasoline or not
enough fuel getting to
engine
Replace with fresh winter fuel.