I'm kinda short on play money now and need to know how to test rectifier/regulator part# 582905 on 150HP evinrude. Seems, these little suckers are $200 bucks a pop. Wolud like to know if this is really my problem before I shell out the dough. I have little to none knowledge of these charging systems. Anyone out there got a good used one that they will part with? Battery on boat reads same volts, motor running or not and Tach works fine.