I've got a 30LB thrust motor guide with a foot pedal moving a 14 1/2 ft aluminum boat. I have a 40 amp circuit breaker connected 8 inches before the + termininal. The breaker gets really hot after i run it continously. The motor guide has 5 speeds and i like it on speed 4 but i can only run it for like 2 minutes at a time and it shuts off. I have to give it a few seconds and then i can use it again. Do i ned a bigger circuit breaker or what is my problem. Thanks.