Polaris TRAIL BOSS 2003 User Manual

ENGINE
3.45
SPARK PLUG
FOULING
TROUBLESHOOTING
G Spark plug cap loose or faulty
G Choke cable adjustment or
plunger/cable sticking
G Foreign material on choke plunger
seat or plunger
G Incorrect spark plug heat range or
gap
G Carburetor inlet needle and seat
worn
G Jet needle and/or needle jet worn or
improperly adjusted
G Excessive carburetor vibration
(loose or missing needle jet locating
pins)
G Loose jets in carburetor or calibration
incorrect for altitude/temperature
G Incorrect float level setting
G PVT system calibrated incorrectly or
components worn or mis-adjusted
G Fuel quality poor (old) or octane too
high
G Low compression
G Restricted exhaust
G Weak ignition (loose coil ground,
faulty coil, stator, or ETC switch)
G ETC switch mis-adjusted
G Restricted air filter (main or
pre-cleaner) or breather system
G Improperly assembled air intake
system
G Restricted engine breather system
G Oil contaminated with fuel
G Restricted oil tank vent
TROUBLESHOOTING
Engine Turns Over But Fails to Start
G No fuel
G Dirt in fuel line or filter
G Fuel will not pass through fuel valve
G Fuel pump inoperative/restricted
G Tank vent plugged
G Carb starter circuit
G Engine flooded
G Low compression (high cylinder
leakage)
G No spark (Spark plug fouled)
Engine Does Not Turn Ove r
G Dead battery
G Starter motor does not turn
G Engine seized, rusted, or
mechanical failure
G Recoil components damaged
Engine Runs But Will Not Idle
G Restricted carburetor pilot system
G Carburetor misadjusted
G Choke not adjusted properly
G Low compression
G Crankcase breather restricted
G Air filter restriction
Engine Idles But Will Not Rev Up
G Spark plug fouled/weak spark
G Broken throttle cable
G Obstruction in air intake
G Air box removed (reinstall all intake
components)
G Incorrect or restricted carburetor
jetting
G ETC switch limiting speed
G Reverse speed limiter limiting speed
G Carburetor vacuum slide
sticking/diaphragm damaged
G Incorrect ignition timing
G Restricted exhaust system
G Cam Lobe worn
Engine Has Low Power
G Spark plug fouled
G Cylinder , piston, ring, or valve wear
or damage (check compression)
G PVT not operating properly
G Restricted exhaust muffler
G Carburetor vacuum slide
sticking/diaphragm damaged
G Dirty carburetor
G Cam lobe worn

Polaris TRAIL BOSS 2003 Specifications

General

Brand	Polaris
Model	TRAIL BOSS 2003
Category	Offroad Vehicle
Language	English