charging /electrical output for 20 hp evinrude 1996 two stroke

[Skiptrace]

I want to add some motorized equipment to my little boat. I am concerned that it will overload the charging system, I currently run a fish finder and two down riggers (which are coming off.) The units I want to add are motorized jig boxes that I am building and will use either 6 amps at 12 vdc or 10 amps at 12 vdc depending upon my final configuration. Am I asking too much? Alternately I thought about using a second battery totally separate from the charging system. I cannot find anything on the capacity of this little motor to provide that kind of power. Everyone I see running these is running a newer 25 horsepower 4 stroke mercury or yamaha. ( Where I fish is power restricted to 25 hp.

 

[F_R]

You can't overload the charging system. But you certainly can use more electricity than it is capable of making. The result would be a discharged battery. More than likely, your alternator can put out 5 Amps, max

It is simple math. If you use 10 Amps for one hour, and the charger can produce a maximum of 5 Amps, you would have to run at full throttle for two hours to replace those 10 Amps that you used.

OK, you guys, I know that is in theory only, and not in the real world. Energy is lost due to heat, etc.

 

[oldboat1]

Motor starting is sort of a plus in your case, imo, and you can pull start if it comes to that — but you should do fine with a couple of batteries with big storage capacity to run electronics.

I think I would buy a couple of deep cycle batteries with large reserve capacity. Get a two-bank smart charger for use at home, and keep the batteries topped off between trips.

$350 or so for batteries is a lot cheaper than a new motor, particularly if you need it mainly for it’s heavy duty charging system.