Which wire for tach?

oldslowandugly

Petty Officer 3rd Class
Joined
May 12, 2010
Messages
98
Hello again. I hooked up the replacement Sierra rectifier as advised on my 80' Johnson35 hp and she seems to be charging fine. When I went to hook up the tach, I used the yellow/grey wire off the stator but it read low. I tried the other wires and got different readings. Then yellow read to 2000 rpm and then dropped off, the yellow/blue read the highest. Should I be getting different tach readings from the different wires or do I have a problem? The Sierra rectifier had no colors on the yellow wires, so I went by the stator wire colors. I know the yellow/grey is supposed to be for the tach, but it's not right. The battery is charging OK and both the stator and rectifier pass the ohmeter tests.
 
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