Starting battery 2 motors problem

[flyingscott]

Hello I need to a switch that can isolate my 2 motors from each other. The problem I am having is with both motors connected to the starting battery I am blowing the regulator on the main engine. My main engine is a 1986 Evinrude 70 hp my kicker is a 1977 15 hp Johnson anybody have any ideas both electrical systems on each motor is working correctly. I only have the problem when both motors are connected to the same battery. I do not have room for a second battery so any suggestions are welcome.

 

[ondarvr]

Something isn't working correctly, you should be able to have both of them connected and not have any issues. It will take further investigation to find the problem. Using a switch to separate the the two motors is easy, but something would still be wrong with one of them.

 

[flyingscott]

I thought so to but they have both been checked both electrical systems are good no shorts or bad switches. I even took them to the dealer after I checked them and they both test good.

 

[alldodge]

Should be able to do it with a 1, 2 or Both battery selector switch. Instead of two batteries and one motor just swap the connections

 

[flyingscott]

Thank you I think that is the way I have to go.