93' Ski Nautique Engine Fuse/Breaker

[pdxCC]

I am confused by my breakers at the back of my 93's Pro-Boss. There is a 50A and a 12.5A breaker with the red buttons and I cannot push them to reset them. I have a feeling that the 50A is getting popped due to a electrical problem but I cannot verify it.

Are these thermo-breakers or manual? (i.e. they heat up and then reset when they cool are are they a manual item) It appears that they are manual but I am not sure.

Baiscally what is happening is that when I turn over the motor with the blower on I lose power/voltage to everything. I measure 4.5V on my systems between the positive post and the ground/block when this happens. I am able to get running again after waiting a variable period or by removing/reinstalling the positive battery terminal.

Your opinion/help is appreciated.

Thanks!
Brett

[ers906]

Check your connections to the alternator. Mine had some rust on the back side of one of the alternator connections and intermittently tripped that breaker. I have to occasionally reset it now only if i get water in the bilge. something I plan to take a look at over the winter.

[pdxCC]

Thanks! I'll get those contacts cleaned when I clean up my battery connections as well.

When I say that it is an electrical problem, I mean it is one I cannot diagnose.... Yup - I know its an electrical problem... The mystery to me is why I am seeing 4.5V EVERYWHERE except across the battery terminals which read 12V.

Ideas on what to check out with the voltmeter this weekend??

[Ceruzziracing]

Check your engine ground, I'd also check the wires behind dash to make sure you don't have bare wiring making contact (you mentioned problem occuring when starting with blower on).