Fried volt regulator, CDI, etc. Yamaha F100

General Boats and Motors
1

A couple of weeks ago, I found a blown 30A fuse under the cowling on my 2002 Yamaha F100… motor wouldn’t turn over, Tilt wouldn’t work, power pole inoperative. I replaced fuse…everything worked fine…at least as far as I could tell. Went fishing Saturday and noticed only 11.7 volts but it didn’t register that I was witnessing a problem. After a couple of hours, motor wouldn’t start, tilt no work, power pole down and no work. Replaced starter battery with troll motor battery and came home. After I got home, the 2nd battery was dead.

Also have 3 bank charger installed.

Reconnected all cables this morning and took it in for service…need regulator, stator and CDI…WOW! …what did I do to it? How did I get it back by simply changing batteries?

2

did you replace the batteries recently?

3

Starter battery last fall and added trolling motor and two batteries this spring.

4

if you happen to have hooked up the batteries wrong, it could have fried all those things

5

I had a similar problem and fried my rectifier(s/p?). I replaced it, and my boat ran for about 2 hours before blowing the 30amp again. FWIW, I replaced a lot of the wiring and connections. After doing the same, I believe it was a faulty ground connection to tilt trim switch in my controls (yamaha f100). Good luck!