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fusing rectifier

S

ship wreck

Contributing Member
I asked this question on another forum but the one response recommended I loom my wiring better. That is true but I need another opinion.

The 140 in my signature had a tach problem that went un-diagnosed for a day out on the lake. Yesterday I found the tach lead had grounded in the control and because it was a dead short all day it burned out the charge coils on the stator. I've ordered a new stator but can I protect the stator by fusing the outputs. My thought is it's a 9 amp stator so fuse the two outputs at 10 amps, a place a separate 10 amp fuse on the rectifier output and a 2 amp fuse on the tach lead. This would seem to give me all the protection I need but do I need to worry about blowing a fuse and having excessive voltage build up from the stator?

Or do I just fuse the tach lead or maybe just pay closer attention. I'm trying to avoid another unnecessary $200 expense.
 
The shorted tach lead was an extremely uncommon event. What are the chances of it ever happening again? Personally I wouldn't be worrying about it. Something else may happen to ruin your day, but don't worry about that either.

Actually, I'm a bit surprised the tach lead didn't burn up before damaging the stator. But as I said, it is so uncommon, I have never experienced it.
 
is the tach lead connected to the rectifier output or to one of the wires coming from the stator?original wiring was the output of the rectifier...
you have a 20 amp fuse in the wiring harness that should have blown on a dead short if the wiring was to rectifier output...and the damage would probably have been to the rectifier...
 
It sounds to me like either a bad battery or blown rectifier is the cause of your damaged charge coils. If the current has nowhere to go, builds up in the stator and burns in t up. A 9a two output charge wire stator probably generates 11v and 4.5a per wire and can't do any more, no matter what the load is. If a load demand greater than a generators output it will only hinder the performance of the load or draw it from the battery not demand more from the generator. My opinion is that it's unnecessary or the factory would have done it and agree with fdrgator and am surprised that the tach lead didn't burn up. A bad battery with insufficient capacity can still function normally all day even. What was your voltage reading?
 
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