Engine warning light comes on ,only when fan have run twice !
Cable lum, throttle boddy , all sensors and also cdi unit already new but still the engine control light comes on when Rhino is put in gear and engine is hot after fan runs twice . Radiator and fan are also new .
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There are 2 sensors for temperature. One near T stat housing for ECU reading. Other one in water passage for the light. The ECU turns the fan on by tripping the fan relay. The light comes on to tell you it's too hot. Check fan to make sure it turns. Check fan fuse to make sure it's not blown. Unplug fan motor and hot wire it to make sure it runs. If it does, locate fan relay and swap it with one of the others with the same numbers on it to see if fan comes on when engine heats up. If fan cycles normally the temp light sensor is probably bad.
Did it have compression before you bought it?
No power to the electric starter? Then you probably have no power to the ignition system. I'd check battery connections. Is the battery going flat overnight? Some shorts. Is there an ignition with a key? Is the switch good? or all the connections good? Corrosion does some funny things. Fuses may look good but actually are not.
You need to call Polaris of send them an e-mail on their website. They will be able to tell you exactly which model year and model the engine came from by the serial number. They may be able to tell you about the CDI box. If everything looks good as far as the parts interchange, and timing adjustments, then rebuild the carburetor with a new float and throttle spring. be careful to put the keeper clip on the correct groove of the needle valve and be extra careful when bending the float arm for proper travel. (Motorcycle shops have a special tool for doing this if you want absolute precision.)
ok two reasons here. 1st being the oil temp sensor or wiring to it from fan.test sensor when eng light is on . wire to sensor must be disconnected..ohms test. to grnd on atv. open or closed. now retest when eng is cold same test as b4. open or closed? if different reading assume sensor is ok. check wiring same way. can do wires eng cold btw. should find a relay for the fan on atv also thats part 2. be a small prolly black box near battery compartment (dry location) (up high ) trace wire from fan to relay then to sensor . pretty simple there . same as b4 either open or closed when hot and different when cold is ok if different. as always CHECK FUSES FIRST. CONNECTIONS SECOND. 95 % electrical ......dirty / bad connections.
The CDI box could be bad or the coil could be breaking down so maybe a new coil would fix you up they only run around 20$ cdi box on the other hand can cost an easy 100$ or better you might also try changing the oil but make sure to buy kinda thick oil cause it's cold out