GT40 Electrical Question

I have a GT40 in my 98 Sport Nautique. Sometimes when I run it fast past 30 mph or so for any period of time the 60 amp breaker on the engine will kick out. I loose power to the dash but the engine will continue to run until I stop the engine. Sometimes the breaker will reset immediately afterwards and other times I may have to wait a short period of time before it will reset. I have noticed the volt gauge jumping around some when I am operating the boat. One scenario I though of is that I may have an alternator or regulator issue. I have not had this checked out yet but that may need to be my next move.

You do mean your '98, not your '89 right?

Scott, I seem to recall someone finding loose connections right at the battery causing the big breaker to pop. Wiggle them and see if you find anything.

I have a group 64 automotive battery maintenance free version. It is a year old. When I bought the boating 08 I replace the battery cable end(s) due to one or both being rough. I cut the cable back and skinned back the insulation and installed a terminal that has to be crimped with a crimping tool. I have never had any corrosion issues. Maybe it is possible that I have a connection problem where the terminal is crimped to the cable. Your thoughts?

Scott,
If you have or have access to a clamp on amp meter that will read DC, I suggest checking the amps at the breaker. As Joe mentions, breakers can go bad but typically there's a reason for it. They don't like to be reset very many times which seems to decrease their trip point. Even some brands of circuit breakers in a home will as well. Testing first is always a plus instead of just throwing parts at a problem.

Scott,
I'd like to add to Brian's comment regarding the clamp on multi meter. If you don't have one get one! They are invaluable at diagnosing electrical problems with your boat, car or house. They are easy to use and come with directions. You don't need to be an EE to use it and we're always around to help! Also, it saves you from becoming just a "parts changer" and possibly saving you about $80.00 if you just check the wiring and then replace the breaker!