I posted this earlier, and it seems that I'm getting conflicting answers. I have a 1979 70hp Johnson. My voltage while running is charging at 17 volts while running. I'm changing the rectifier. That seems to be the common suggestion from this forum and my Clymers manual. My battery is a 3 year old marine starting battery, 500ccl, water is good and I had it load tested and it tested at 500ccl plus. The guys at the battery store say there is nothing wrong this battery. I've talked to 2 locale OB mechanics and got 2 different opinions on changing the rectifier. One said that it would make no difference and the other agreed that was probably the problem. Is this battery too small to handle the charge being sent to it from the charging system?
As I stated earlier, I'm changing the rectifier regardless. I'm getting rid of my old speedometer and installing a tachometer. Based on info from members of this forum and other sources. I've been told that if the rectifier is bad the tach won't work. So what the heck, the rectifier is a fairly inexpensive and easy fix. I'll also feel more confident that my new tach will work as well.
Thanks for the help with my other posts. I'm interested in your suggestions and thoughts on this.
I'll let you know how the the upgrades go to the boat and motor.
Jim
As I stated earlier, I'm changing the rectifier regardless. I'm getting rid of my old speedometer and installing a tachometer. Based on info from members of this forum and other sources. I've been told that if the rectifier is bad the tach won't work. So what the heck, the rectifier is a fairly inexpensive and easy fix. I'll also feel more confident that my new tach will work as well.
Thanks for the help with my other posts. I'm interested in your suggestions and thoughts on this.
I'll let you know how the the upgrades go to the boat and motor.
Jim