I’ve had my 99 Yamaha Kodiak for a few months and the oil cooler fan never comes on. My buddy with a 03 Prairie his always comes on. I’ve ridden for hours in 90 degree temps with no fan. I thought it might be the oil thermal sensor so I bought one of those. I hooked the sensor up and put it in boiling water and still no fan action. I know the fan works when I complete the circuit at the plug for the sensor the fan comes on. My questions is does the oil cooler fan only come on when the machine is overheating?? Or is it supposes to come on periodically during a ride?

Thanks

Matt

 

Humm can't comment of the oil cooled but my water cooled kodiak the fan kicks on multiple times during a ride. I would assume your fan would have to kick on sometime especially after a long ride.

 

PowerRam100,

Depending on barometric presure and altitude boiling water may not get hot enough to close your thermal switch. In an engine water gets much hoter than it can on your stove because it's under presure. Thermal switches are very fragile internally and can be broken by dropping it they also go bad (I had to replace one after 6 months on a Grizzly). They are also not very expensive. If you want to test it use cooking oil ont water and bring the temp up to at least 230F with a cooking thermometer. Good Luck [img]i/expressions/face-icon-small-smile.gif[/img]

 

The cooling fan on my Eiger (air cooled, oil cooler, aux fan), is supposed to come on about 245 degrees. It seemed like the fan never came on so I finally parked it at a high idle with a thermometer stuck inside the cooling fins. After about 20 minutes it finally came on. Since then, it has worked fairly frequently but usually only when I'm doing low speed work in hot weather.

Jaybee

 

The oil temp sensor cost me $65.00 there not cheap but ill try your suggustions.