2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 204Get this manual
ELECTRICAL
STARTER SYSTEM TROUBLESHOOTING
Starter Motor Does Not Turn GBattery dischargedlow specific gravity GLoose or faulty battery cables or corroded connections (see Voltage Drop Tests) GRelated wiring loose, disconnected, or corroded GPoor ground connections at battery cable, starter motor or starter solenoid (see Voltage Drop Tests) GFaulty starter button GFaulty ignition switch (Do other systems function?) GFaulty starter solenoid or starter motorGEngine problemseized or binding (Can engine be rotated easily with recoil starter?) Starter Motor Turns Over Slowly GBattery dischargedlow specific gravity GExcessive circuit resistancepoor connections (see Voltage Drop Test below) GEngine problemseized or binding (Can engine be rotated easily with recoil starter?) GFaulty or worn brushes in starter motor GAutomatic compression release inoperative
voltage drop tests on the starter system
Voltage should not exceed: DC volts per connection
STARTER MOTOR DISASSEMBLY