i have a polaris magnum 425 that is boiling water out of the resivor bottle the fan is wired derect so it come on when key is on thermostat is working radiator is clean any ideas

 

sounds like you covered everything except the water pump

 

Is the radiator xlean both inside and outside? You would be surprised how much gunk gets trapped in the fins on the outside! The stat might be workinf but is it working correctly, new ones are cheap. Last of all, are you running a 50/50 mix of antifreeze? Water has a much lower boiling point than antifreeze!

 

I plow my radiator out. Gets plugged when riding through weeds. Are in and out hose hot? If not t-stat or pump not working is my guess.

 

oh ya forgot about that it circlates water just boils out of the revisor hot light comes on but never actually like fully overheates

 

Are you using a 50/50 mix of antifreeze or just plain water? Water boils at 212deg where a 50/50 mix boils at 240plus deg. Big difference there.

 

actually unless it's change, Polaris used a 60/40 mix

 

im using 50/50
that is still fine for a mixtue