FuriousMob
Seaman Apprentice
- Joined
- Aug 30, 2009
- Messages
- 48
89 100hp evinrude (commercial)
The issue is the tach intermittently working, cutting in and out. I've done a myriad of tests and everything is good except the send for the tach. At the tach, testing the AC voltage on the send I get ~5.5v, but it will cut in and out. I just did the Joe Reeves test where I connect the send at the terminal on the engine to the yellow/gray wire. The tach "sort of" works, but it's jumpy and if I give power to things on the boat (horn, lights, etc), it causes the tach to jump up in RPMs. Is this normal when testing this way? If so, then it would seem to I need to replace the regulator/rectifier, but if not, I would imagine I could have any number of other wiring issues.
Thanks for any help.
The issue is the tach intermittently working, cutting in and out. I've done a myriad of tests and everything is good except the send for the tach. At the tach, testing the AC voltage on the send I get ~5.5v, but it will cut in and out. I just did the Joe Reeves test where I connect the send at the terminal on the engine to the yellow/gray wire. The tach "sort of" works, but it's jumpy and if I give power to things on the boat (horn, lights, etc), it causes the tach to jump up in RPMs. Is this normal when testing this way? If so, then it would seem to I need to replace the regulator/rectifier, but if not, I would imagine I could have any number of other wiring issues.
Thanks for any help.