LostInThe80's
Recruit
- Joined
- Jul 13, 2011
- Messages
- 5
Greets to all since this is my first posting here. First a short run up. As I stated in the thread description, I have a 1988 Merc Black Max 135hp Oil Inject motor SN-0B304160. I've been experiencing charging problems in that I'm only getting about 12.4 - 12.7v output with about 1.8 -2.1amps output as well. This is at low speed and medium speed (about 20-25mph). I brought the boat in to get checked and was told my rectifier was shot. I had it replaced. The tech said that there was a hole burnt through it. I got the boat back and tested it on the water. The highest voltage output I measured was about 12.6vdc and the amps were about 2.7. I brought it back to the same shop and told the tech what I found out. She checked the stator for me and said that the high side was at about 130 and that it was a bit low but was still in working order. The low side was at 35 I believe. Apparently the stator had checked out OK. As I asked questions about the charging path, she deduced that there was a secondary rectifier on the top of my engine at the back. She didn't know for sure since she didn't know what this part was exactly. I asked if the part was a voltage regulator but she didn't think so. Can anyone tell me their opinion on the charging problem or this secondary rectifier/regulator? I've attached three pics. The one of the right side view shows the old rectifier assembly obscured before replacement. It's to the left of the solenoid. The top of the engine shows the suspected secondary rectifier or regulator I was talking about. It's to the right of the black box and is the one with the yellow and red wires coming out of the top.