Does anybody know what type of charging system this outboard has ? The reason I ask is while at the river the other day, I went to start the outboard after launching and the battery was dead as a door knob. After starting it with the starter rope I drove around the lake for quite awhile at full throttle but the battery didn't seem to charge up much. The battery is brand new and I know it's good because I put it in my Bronco to charge it on the way home and it's been in there every since. Do these engines have a rectifier? Is there some way I can test the motor to see if it's charging like it should?