Re: Dual Batteries On Yamaha 130
thats why I sent you to the PROPER manual. as you did not post your model number thats all I can do.
if the 130 is NOT a C130 AND its a 1990 or above its as simple as purchasing the correct rectifier and lead assy from yamaha and presto shazamo, instant house battery charging with the engine isolator.
on page 3-32 and 3-33 there are diagrams of how to wire it with and without a batt switch. myself I wont wire it to the battery terminal as shown on page 3-33 , instead I take the isolator lead to the battery switch terminal to help protect it from corrosion from battery off gassing.
to use a standard Isolator you will need to break the circuit between the rectifier and the starter relay and take the rectifier output lead to the hull mounted isolator and then take each isolator output to its respective battery positive terminal or switch terminal.
so with a convetional Isolator we now have 5 connections to fail 2 more wires in the hull and an isolator that does not like moisture I dont care what it says on the case.
that coupled with your yamaha designed setup it works well with the rest of the charging system.
