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Put in new CDI... no spark. Put in new ignition coil- it ran for a long moment. We thought it might be flooded, but when we went to start it again- THERE WAS NO SPARK. Obviously it had a spark for awhile. Now we don't know if the CDI or ignition coil is still any good. Is there a way to test out the system and find the problem. Snow season is getting closer everyday and we use this machine to get to town. Can anyone advise what to try next?

Bravo 2011
 

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First, did you check the spark plug cap? It should just unscrew from the end of the wire, cut back about 1/4" and then screw it back on. (hint, you can use a tiny bit of WD-40 to help slide it back in).

Put a A/C volt meter on the input from the stator and see what you get. Should jump up around 36 volts.

Then on the CDI, measure from the output to the coil to ground. Should jump up around 18-36 volts still.

If you get that far, then the coil can be tested just by testing resistance. Go from the spark plug cap to ground and you should get around 100-200 ohms. disconnect the wire coming from the CDI and measure between it and ground on the coil. Should be around .2 ohms.

If all that checks out, something else is grounding out. You can disconnect the wires going to the kill switch and key switch and see if that cures it. If it does and you have it running with no way to kill it, pull the choke and it will die (floods it, but easy to start after a few minutes).
 

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Anyone having intermittent spark and sometimes no spark there is a switch on the carb; if your sitting on machine its on left of carb when this screws up it plays havoc with the spark and your head. Easy fix once you know. Unplug wires then plug the wires into each other and spark will return. Took me two years to figure this out
 
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