CDI (Mags) problem
Help, I have a problem when chequing the CDI (Mags) when I have my 503 at 4,000 rpm and I check one CDI the RPM does not drop on the other one the engine shots off. The engine starts normally and sounds like it has always sounded this is why I think the CDI's are ok the problem is when I check them. I thought it was the switch so I changed it and the same exact problems persist, can anyone enlight me on what to do or what to check.
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- 1 like
- Jozinko@Sajan
jeff trikeJozinko liked this
When the "mag" switch is closed, it grounds an electrical circuit, which turns off one of the ignition circuits to both of the cylinders. If the one of the ignition circuits is broken, then the engine is using the other ignition circuit. That's why you have dual ignition. If the engine just stops when you close one of the switches, one of the ignition circuits is not working at all, or maybe the wire on the other switch is shorted out and is always grounded. I think the DCI boxes are pretty reliable, so its probably a shorted wire.
I had a similar problem with my 582 and it ended up being a bad stator coil. This page has some information you might find useful.
http://www.ultralightnews.ca/charging_uslk/charging_system.htm
Thanks Jeff my thoughts exactly, I am going to run some tests to see if I have a bad wire somewhere, that is what I am hoping for.
Thank you for the link Ken hopefully this is not the case, I will do some tests to determine what it is going on.
I hope that as well. Mine cost ~ $700 to replace!!
Update: Went to the air strip yesterday with my multimeter and did a Thorough check of all the electrical parts I checked the ohms for the electrical boxes (CDI) they were OK, I checked the pickup coils (Triggers) and also were OK and when checking the stator (coil kit) one phase was NOT OK. I was hoping for a short somewhere but my fear of the most expensive electrical part of my engine failing came true. I checked the price on Lockwood and on CPS and they both have the same price $750.
I feel your pain. Exactly how my adventure played out. The good news is they are easy to replace once you pick yourself up off the floor.
- 2 likes
- Ken@knussear
- Diego Sagrera@diegosagrera
MontyKen liked this
Diego Sagrera liked this
hi diego, is it possible to re-wind the stator coil? i've re-wound coils myself, some even worked! all you need is the same kinda wire, the number of turns and patience! $750!!!!! i'd certainly try, wadja got to lose!, maybe a electrical repair shop could do it, better than making rotax even richer. ps, if you do rewind the coil be sure to replicate exactly the direction of the wire etc, or it might plunge buenas aires into darkness!
- 1 like
- Ken@knussear
Diego SagreraKen liked this
Thank you Monty, I did not know they can be repaired, a friend of mine has an extra coil and he is going to give it to me, actually I am going to go pick it up today after work, I am going to see which stator is better and then try and fix one. Like you said I have nothing to lose and experience to gain. I actually enjoy this type of challenges. I will keep you guys posted and maybe I'll do a video on it to :)
My 10-year-old CDIs pooped out too, one after the other. Initially, I replaced only one with a new soft-start, which worked for a while. Then I had to trickle charge the battery or the trike wouldn't start. Just replaced the other CDI with a used, but still good one. Starting problems solved. I'm told you can send the CDIs back to the factory and they will repair them though I can't remember how much it costs. If my current CDIs get weak, I'll probably send in the originals (I don't have Diego's skills). It's got to be cheaper than new.
- 1 like
- Ken@knussear
Diego SagreraKen liked this
Update: Got the coil kit from my friend, tested the Ohms on it and everything cheques OK. will go to the airstrip this coming Saturday and change it. I don't think I am going to try to fix the old coil, It is too much of a challenge.
Cool Diego. Fingers crossed for you.