I have had this broken wire problem too, several times with exactly the same symptoms. The faulty wire(s) in my case was the one coming from the stator assembly and was broken just before the module connector. Scott --- On Fri, 8/13/10, Thom Riddle wrote: From: Thom Riddle Subject: RotaxEngines-List: Re: Engine roughness To: rotaxengines-list@matronics.com Date: Friday, August 13, 2010, 6:56 AM --> RotaxEngines-List message posted by: "Thom Riddle" Hugh, When you turn off the Left mag switch (for example), that action should ground the Left mag (disabling it), thus leaving the engine running on the Right mag only. If you turn off the Left mag and the engine quits, it means that the Right mag is not firing the engine. This means that one (or combination) of the following things is happening: 1) Right mag is faulty. 2) Right mag is grounded. The Right mag being inadvertently grounded could be caused by one of two things, that I can think of: A) A bad switch (mistakenly grounding the mag when the switch is in the on position), unlikely but possible. B) Right mag wire has made ground elsewhere, most likely. So, what you are looking for is these two things. If you find no fault in either of these, then you need to look deeper, i.e., check out the functioning of the mag itself. That is beyond the scope of my ability to explain in an email. I hope this helps. -------- Thom Riddle Buffalo, NY (9G0) Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x32 The truth will set you free. But first, it will piss you off. - Gloria Steinem Read this topic online here: http://forums.matronics.com/viewtopic.php?p=308657#308657 le, List Admin.