i have a 03 rancher 350 even after a 20mi hard ride and let idle afterwards fan has yet to come on.dealer says will not come on only if its overheating.think i should check by grounding where wire goes to sencer?how do i do this?

 

I was questioning the fan on my Eiger a while back - had some motor work done and was worried about it overheating. It seemed like the fan never came on. Finally called the service dept and found that the fan is designed to come on at 246 degrees. Parked it in the garage at a high idle and stuck a cooking thermometer in between the cooling fins. It took a long time, probably 15 to 20 minutes and the motor sure 'felt' and 'smelled' hot but sure enough - right at 246 the fan kicked on. Once the fan forced air through the oil cooler it dropped way down in a few seconds. I don't worry about it anymore - although I do have this fear that my wife will find out where her cooking thermometer has been.

Jaybee

 

my buddy has a rubicon and i think that is jsut the way hondas are, his fan rarely goes on. as long as u don;t smeel nothin i think u will be fine, enough air get forced through there when u are riding that it keeps it cool without the fan. but it prob wouldn;t be a bad idea and make sure it does work.

 

How can you run a 350 hard enough to make the fan come on? LOL First letting it idle will not get it hot enough. The fan will run a little but not too often. If you are like me I have a switch that turns my fan on and when the switch is off it turns on when it needs to. Very easy to do all you have to do is give it a different power source from the battery and have a 2 way switch from that to the stock wire. I feel your bike doesn't require a fan... it doesn't need the cooling other bikes need.

 

Get stuck in sand or even snow. After working it back and forth for a while the fan will come on. You'll smell it when it gets hot enough.

 

you can run a 350 hard if you don`t stop to check your makeup every 5mins.

 

Yeah I don't get this either. My fan comes on when I am trying to pull KVF's out of the mud. LOL.

Mine comes on as needed, which is usually when I am dragging the road and my driveway with the extra heavy drag I have.

 

The 350 has to be running and work constanly for the fan to come on and i found once you stop/ let it idle the fan will shut off in seconds. If a 450 fan comes on it also could be an indication of a lower oil level. Dragging kawis, plowing snow etc.. for a long time would get the fans on a 450 easier than a 350; the 350 fan will come on after a while. Also a clogged oil cooler would cause the fan to come on.

 

I had a 350 Rancher a couple of years ago. The only time the fan came on was when i would ride it in a low gear for a few miles. I was looking for a new hunting location at slow speeds. I wondered if it even worked, and was going to have it checked but it eventually came on. I never overheated while I had it I've had my grizzly for around 6 or so months and I've overheated several times due to mud covering the radiator.

 

i got a rancher. its fine (your fan). mine comes on once in a while, noramlly hi revs in low gears make it come on. but once my fan comes on i let it sit and cool its self down. and jsut because your fan comes on doesnt mean its over heating. the red light on the dash will tell u when that happens.