wire feed for a 50 hp johnson outboard

[mollywalk]

I recently finish the gutting and re-doing my old lund boat and wish to install a selector switch for two battery banks.<br />One being the starting battery and the other for the trolling motor battery which gets a lot more used as the years pass on.<br /><br />The Johnson outboard manual states a 5 amp alternator and a 20 fuse but I cannot find anything on the starter output. The longest lenget would be 12 ft.<br /><br />As I understand the wire size is base on the starter rating output.<br /><br />Thanks,<br /><br /><br />Bill

 

[phatmanmike]

Re: wire feed for a 50 hp johnson outboard

first off, the starter doesnt have an OUTPUT, it has a DRAW.<br /><br />i have sizo 1/0 wire for my batteries and my selector switch, and they are about 8 feet away from each other( on opposite sides of the boat) and each one is about 5 feet from the motor.<br /><br />whenn selecting wire siize, look at the largest freeken wire you can afford, then get the next largest size. you thank yourself later.

 

[mollywalk]

Re: wire feed for a 50 hp johnson outboard

Thanks for the input but as start reading on the net I see if you double the lenght than go to the next size larger as a rule of thumb.<br /><br />My current feed cable is 10ft and I need 12 ft to the selector switch. Than I must add the 8 ft for the longest run to a battery so it appears to be a double.<br /><br />I have a six gauge and need a four unless I can find the amp draw of my starter.<br /><br />Thankd again.