New amp causing engine reset to trip

[dhook]

I just had an amp installed in my boat. Everything was going great. Had just put on Smart Tabs and was cruising with a big ol smile from the improvements. About 3 hours into the day steadily running and kids tubing, the engine just shuts off and everything dies. MPH gauge has pegged over to 60 and all other gauges are not working, turn the key and nothing. Throw the cover open and check the cables and everything looks ok. Push the engine reset and it clicks and so I try starting it again and it starts right up. Give a worried sigh of relief and start heading back to the ramp. 5 minutes later same thing. Once again reset the breaker and limped home without further incident.
My boat has never done this before and I am assuming that somehow the amp installation has caused this. I can see he has run the power and ground wires from the amp directly to the battery and there is an installed line fuse in the amp power line which was fine. I am feeling it is some kind of short somewhere but not sure where to look or how to test it. What electronically would make the engine reset switch trip? Any ideas or previous occurrences like this?

 

[wire2]

Re: New amp causing engine reset to trip

If you say he's run the amp leads directly to the batt (fused) then the main CB doesn't see the current to the amp, and shouldn't have anything to do with the trips. It seems to be a coincidence that it trips just after the install.

Leave the amp off for next time out, see if it still trips. If it does, check if the trim motor is hot. If there's a fault in the control wires or relays, it may be trying to run.

I believe the CB is 50 amps? That's 600+ watts of power going somewhere.