[Geekie1]

If the CDI unit is only firing the center two cylinders, I doubt if the engine would barely run at all. In order to get the plugs to fire on a 92' or earlier Yammie V6's, you need a very good battery that will turn the engine over at a high speed. Get a spark tester and the spark should jump a 1/4" to 3/8" gap. The CDI unit on early Yammie V6's is a very bullet-proof unit and most senior Yammie techs agree that a bad CDI is a very rare occurrance. A bad stator is also rarely seen. That doesn't mean that they can't be defective, but just do the obvious things like plugs, wires, caps, batteries before you start throwing very expensive parts at the problem. I think plug caps were a problem on 92 Yammie V6's. Most of the ignition problems on these engines are caused by bad grounds!!

I think that there is a used CDI unit for auction on EBay as I am writing this reply. (10/16/06) $100.00 vs. $500.00+ makes sense to me!!!

Check in with the IBoats Forum (iboats.com) They have resident Yamaha techs that have been working on Yamaha V6's since Yamaha began importing them in 1984.
When you ask them a question, make sure you give them the correct year and model #. The model # is on the starboard side of the mounting bracket (looking from the back of the engine forward), and will be something like ETXN. I hope this helps!!