These sleds are prone to a no spark condition. The spark on the machine is generated from the 12 volt battery, not the stator. The way the spark is generated is 12 volt into the CDI Box. (This comes from the battery) Then the CDI box with a ground trigger from the ECU (Fuel Injections Computer) triggers the coil to spark. The ECU gets a trigger signal from the Ignition sensor on the flywheel housing.
The CDI Box has 5 wires going to it.
Blue = Ground Trigger from EUC
Brown = Ground
Red w/blue trace = 12 volt +
Black w/white trace
White w/blue trace
These wires go to the coil
2 Methods to test.
1st On the machine
Disconnect the Connectors 2 (Wires to coil) Put a DC meter on the wires to the coil. Turn the key on the machine. You should get 24 volts DC across the Black w/white and the White w/blue wires. If you do not get that reading, verify you are getting 12 volts into the CDI box on the Red w/blue and the Broen wires. When these fail, you will see no voltage out to the coil with the key on. The common failure is that at room temperature, you will get the 24 volts, then when the CDI box gets cold. (Like in the winter time) then you lose the 24 volts to the coil.
2nd On the bench
Take a 12 volt power source and feed 12 volts onto the Red wire and the Brown wire. Then meter across the wires to the coil from the CDI Box and you should have 24 volts. If you do have 24 volts, put the CDI box in the freezer for 20 min. Take out and retest. Many times a bad unit will lose spark after coming from the freezer. IF YOU DONíT GET THE 24 VOLTS OUT OF THE CDI BOX AT THE COIL WIRES AT ALL TIME, YOU HAVE A CDI BOX THAT NEEDS REPAIR.
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