I have 2002 50HP 4 stroke mercury outboard motor and can't get to start. It has a very weak crank, seems like a poor battery. But, I have new marine battery that is fully charged and also have tried starting charger and neither will turn over the motor enough to start.
My amp meter on the boat when inigition is on shows 12amps. How do I check starter or alternator to see if ok?? Please help--