89 150 XR4 with the 16 amp charging system. Separate rectifier and regulator.
I drained the battery fairly low last year but the motor eventually started. After this event I had no charging or tach. (sometimes it would intermittently come on though very briefly) When I got home i noticed the rectifier was melted a tad. Replaced rectifier (new oem part from dealer) Problem persists.
Opened up factory manual and performed tests. Yellow to yellow wire there is the equivalent of a dead short as the manual says it should be. Both yellows show no continuity to ground. With engine running there is 7-11 VAC across yellow wires depending on RPM. Battery voltage @12.4 VDC. The red wire on the regulator shows this 12.4VDC with engine running and yellow at regulator shows about 9VDC ( I think, although may not be pertinent)
What Im trying to figure out is if the problem is my stator or my regulator. Are there more tests to perform? Most of the testing in the merc manual is for the 40 amp system which I dont have. Worth noting is that the stator is 2 seasons old and was replaced when I rebuilt the powerhead. It is NOT an oem part and I believe it is a cdi unit part #5456-16.
Thanks guys!
I drained the battery fairly low last year but the motor eventually started. After this event I had no charging or tach. (sometimes it would intermittently come on though very briefly) When I got home i noticed the rectifier was melted a tad. Replaced rectifier (new oem part from dealer) Problem persists.
Opened up factory manual and performed tests. Yellow to yellow wire there is the equivalent of a dead short as the manual says it should be. Both yellows show no continuity to ground. With engine running there is 7-11 VAC across yellow wires depending on RPM. Battery voltage @12.4 VDC. The red wire on the regulator shows this 12.4VDC with engine running and yellow at regulator shows about 9VDC ( I think, although may not be pertinent)
What Im trying to figure out is if the problem is my stator or my regulator. Are there more tests to perform? Most of the testing in the merc manual is for the 40 amp system which I dont have. Worth noting is that the stator is 2 seasons old and was replaced when I rebuilt the powerhead. It is NOT an oem part and I believe it is a cdi unit part #5456-16.
Thanks guys!