2nd Battery

[spareparts]

if you are running a yamaha, you all ready have a second isolated charging circuit built in the motor, look under the cowl for the # 8 red wire with the end taped off, it may be made into the battery cables(look for the pigtail), you can run it to charge the second battery, leave the switch on 1 while running the boat, and have #2 in reserve. As far as batteries go, spending extra money on high dollar batteries(Optimas) aren't going to make up for any marginal wiring or poor installation( I get in this argument a lot), no more than splitfire plugs are going to fix a motor that needs major service, or startron additive is going to let you run you engine on water. Use good cables, good connections, and good batteries. I've been selling the Deka 24M7 1000 MCA maintenance free batteries for a number of years, I haven't had one come back as being bad. IMHO its the best money you can spend on a battery in a boat