I HAVE A '02 GRIZZLY AND THE TEMP LIGHT COMES ON AFTER ABOUT 10 MINUTES OF RIDING. THIS IS WHAT I HAVE CHECKED:
WATER LEVEL
OIL LEVEL
CLEANED RADIATOR FINS
THERE IS NOT A THERMOSTAT IN IT
THERMO SWITCH #2
THE CONNECTOR ON TOP OF THE MOTOR UNDER THE GAS TANK
THE WATER TEMP IS ABOUT 200 DEGREES. I DON'T KNOW IF THAT IS NORMAL OR NOT. PLEASE HELP!!!!!

 

Id put the themostrat back in it, and then check to see if the fan is working. Then if that all checks out, id check engine compression, you might have a blown head gasket.

 

200 deg sounds high to me

 

OH YEA! THE FAN IS WORKING PROPERLY.

 

WHAT ABOUT THE WATER PUMP? IS IT FLOWING?

 

WHILE IT WAS RUNNING, I LOOSENED THE BOLTS UP WHERE THE THERMOSTAT GOES AND WATER STARTED TO COME OUT. DOES THAT MEAN IT WORKS?

 

WHEN I GO HOME FOR LUNCH . I'LL GRAB MY GRIZZLY SHOP MANUAL AND LOOK UP OVERHEATING DIAGNOSTICS, I'LL GET BACK TO YOU AROUND 1:30 TO TELL YOU WHAT I FOUND

 

IF YOUR SURE THAT THE TEMP. SENSOR IS TURNING ON AT ABOUT 154F THEN THESE ARE OTHER ITEMS TO CHECK( CORRECT SPARK PLUG AND CORRECT GAP)(CARBON BUILD UP IN THE COMBUSTION CHAMBER)(CLOGGED AIR FILTER)(TOO LOW A FUEL LEVEL)( DID YOU CHANGE THE MAIN JET IN THE CARB?)(FAULTY CDI SYSTEM) GOOD LUCK

 

THANKS FOR YOUR HELP!

 

LET ME KNOW IF YOU NEED HELP IN DIAGNOSING THESE DEEPER INVOLVED ITEMS, START WITH THE EASY BASIC ONES, YOU CAN GET A CD SHOP MANUAL ON EBAY FOR ABOUT $11.00 THATS HOW I GOT ONE.