I have SeaDoos but at another site I go to a guy has a question about a Yamaha. Here is his problem. Any help would be appreciated.

I am having a problem with my 1992 WaveRunner VXR 650 and wondering if any of you have had a similar problem. When trying to start, it will fire briefly and then quit. I pulled the plugs, grounded one to visually inspect what the ignition was doing and it seem that this is the problem. When I crank the engine over the plugs fire momentarily and then stop. I figure is has to be one of the following, the coil, ECU or the trigger…anyone seen this before or have a good guess?

Thanks in advance,