2001 Polaris Sportsman 400-500 DUSE and H.O. Service Manual, Page 352Get this manual
ELECTRICAL
STARTER SYSTEM TROUBLESHOOTING
Starter Motor Does Not Turn
&Battery dischargedlow specific gravity &Loose or faulty battery cables or corroded connections (see Voltage Drop Tests) &Related wiring loose, disconnected, or corroded &Poor ground connections at battery cable, starter motor or starter solenoid (see Voltage Drop Tests) &Faulty starter button &Faulty ignition switch (Do other systems function?) &Faulty starter solenoid or starter motor&Engine problemseized or binding (Can engine be rotated easily with recoil starter?)
Starter Motor Turns Over Slowly
&Battery dischargedlow specific gravity &Excessive circuit resistancepoor connections (see Voltage Drop Test below) &Engine problemseized or binding (Can engine be rotated easily with recoil starter?) &Faulty or worn brushes in starter motor &Automatic compression release inoperative