Polaris 2005 Sportsman MV7 - Troubleshooting

ENGINE
3.58
TROUBLESHOOTING
Spark Plug Fouling
S Spark plug cap loose or faulty
S Choke cable adjustment or
plunger/cable sticking
S Foreign material on choke plunger
seat or plunger
S Incorrect spark plug heat range or
gap
S Carburetor inlet needle and seat
worn
S Jet needle and/or needle jet worn
or improperly adjusted
S Excessive carburetor vibration
(loose or missing needle jet locating
clips)
S Loose jets in carburetor or
calibration incorrect for
altitude/temperature
S Incorrect float level setting
S PVT system calibrated incorrectly/
components worn or mis-adjusted
S Fuel quality poor (old) or octane too
high
S Low compression
S Restricted exhaust
S Weak ignition (loose coil ground,
faulty coil, stator, or ETC switch)
S ETC switch mis-adjusted
S Restricted air filter (main or
pre-cleaner) or breather system
S Improperly assembled air intake
system
S Restricted engine breather system
S Oil contaminated with fuel
Engine Turns Over But Fails to Start
S No fuel
S Dirt in fuel line or filter
S Fuel will not pass through fuel valve
S Fuel pump inoperative/restricted
S Tank vent plugged or pinched
S Carb starter circuit plugged
S Engine flooded
S Low compression (high cylinder
leakage)
S No spark (Spark plug fouled)
ignition component failure
Engine Does Not Turn Over
S Dead battery
S Starter motor does not turn
S Engine seized, rusted, or
mechanical failure
Engine Runs But Will Not Idle
S Restricted carburetor pilot system
S Carburetor misadjusted
S Choke not adjusted properly
S Low compression
S Crankcase breather restricted
Engine Idles But Will Not Rev Up
S Spark plug fouled/weak spark
S Broken throttle cable
S Obstruction in air intake
S Air box removed (reinstall all intake
components)
S Incorrect or restricted carburetor
jetting
S ETC switch limiting speed
S Reverse speed limiter limiting
speed
S Carburetor vacuum slide
sticking/diaphragm damaged
S Incorrect ignition timing
S Restricted exhaust system
S Cam worn excessively
Engine Has Low Power
S Spark plug fouled
S Cylinder, piston, ring, or valve wear
or damage (check compression)
S PVT not operating properly
S Restricted exhaust muffler
S Carburetor vacuum slide
sticking/diaphragm damaged
S Dirty carburetor
S Cam worn excessively