583 Rotax Won't start - Snowmobile Forum: Your #1 Snowmobile Forum

naut1ca102 · 12-21-2005, 01:07 PM

Help.. My 93 Formula plus stopped running sometime at the end of last season. I didnt touch it all summer and now we have snow and i cant get her to start. I don't get spark. My carbs are finely tuned. I get electric current to all my lights. I checked the power before the coil. I put a test light on the two wires and i get nothing. my understanding is that from the magnito the electrical curent runs to the coil. however it also runs all of my guages and lights(the magneto) am I misunderstanding the theory? or is my magneto bad? where should I turn next. I have mechanical experience, my brothers and auto mech. and his gf is a small eng. mech. but they don't want to be bothered to help and im not gonna pay someone for what I know I can do my self.

upersleder · 12-21-2005, 03:27 PM

start with the simple stuff, checking the wires ect. make sure its not the kill switch by unplugging it.

**smallengineguy** · 12-21-2005, 03:32 PM

Spark is caused by 3 things, coils, CDI and stator. If you unplug the key/kill/tether and still have no spark, then one of the 3 is bad. If your machine has 2 coils, it's unlikely they both went bad at the same time. The next step is the CDI.THey around $60 aftermarket.

naut1ca102 · 12-21-2005, 11:33 PM

what is the CDI?

naut1ca102 · 12-21-2005, 11:35 PM

It is a single coil. I disconnected the Kill switch but not the other 2. Ill try that tomorow. but theres NO power before the coil either. so idk if its the coil. when i put the test light on the wires that connect to the coil I GOT NOTHING.. so I doubt its the coil. but what is the CDI. ?

upersleder · 12-22-2005, 12:05 AM

the black box your coil is plugged into

**smallengineguy** · 12-22-2005, 06:58 AM

It's usually mounted under the ehxaust header.

naut1ca102 · 12-22-2005, 11:08 AM

ok so I'm going out to check out the Teather, and the ingnition. I just disconnect them in the middle of the line? where the plastic clips are... idk if thats right because then i have interupted the flow of current.. but ill try it.. maybe im supposed put jumpers from each terminal on the connectors? idk... my sleds wierd.. plus I looked at the diagram again on ronnies and it shows no stator? by stator do you mean magneto?

naut1ca102 · 12-22-2005, 11:09 AM

if i go and buy parts used can i put a voltometer on them to test to make sure they are good so i am not working counter productivly?

naut1ca102 · 12-22-2005, 02:46 PM

THANK YOU FOR YOUR help.. it was just a loose ground wire to my CDI.

94zr580 · 12-22-2005, 02:49 PM

glad to hear u got her fixed

IndianRvrShiver · 12-22-2005, 03:38 PM

Another happy ending!!