Weak Coils

[BAISICNORTH]

100 HP Yamaha V4 1999-2000, I have been told that the factory coils on this motor are weak and should be replaced with after market coils. Does any one know where i could locate ignition coils? I have replaced 2 coils already, they don't last long. Any suggestions??

Thanks for your help.
Jim

[jb123]

you should locate them from the idiot that told you to replace with aftermarket ones, sorry if that sounded harsh.

[Ken]

Jim,
I don't understand how ignition coils could get "weak" - they are nothing more than a step-up transformer encapsulated in a rubber compound. They either work, or they don't.
If I were going to replace a coil on my Yamaha, I would stick with factory oem. The sponsor of this forum, boats.net, is a good source of genuine Yamaha parts - great prices and service.
Good luck [img]smile.gif[/img] ,
Ken K

[BAISICNORTH]

Back in town..was on Holiday and got into a Tornado.
Follow up on coil problem..I have a tester for kilo volts, it reads about 6000 kva at idle, when the boat runs good, Rough I get a bad coil reading ( 2000 - 3000 kva).
I have now found that my rectifier/regulator is getting very hot (can-t touch it) if I cool it down with a cup of water boat runs great. Reading on Kva tester is then correct. Problem is getting worse and that is a good thing as very hard to test intermitten problem..
Thanks for your help..Sorry to dis Yamaha..Jim