Mercury

I want to know if there is a way to fix this problem with out buying new motors.

Run a twin wire from your battery to each morot plug, probably 3 wires when you get there . 1 is a common or earth, 2nd is for up , 3rd is for down.if you can bloke ually work them its the switch. even easier is to connect the wires behind the switch and this will run the whole circuit for you.have spare fuses when you try all this , your bound to go through a few.doesnt sound serious