Quote Originally Posted by hairball View Post
Definitely sounds like a thermal overload issue. I would try bypassing the breaker and see if the problem persists. Breakers can get weak over time and open below the specified amperage. Just take the breaker off the wire and hook up the wire directly to the battery.
Do NOT do this............that is foolish advise. Yea, breakers do go bad, but it will not take ANY time for you to short, damage, and maybe even SMOKE your boat.

the breaker will cost you less than 10 bucks at A20 or any other boat store. GET a new breaker rated for 40 amps, and be done with it.

Later,

Geo