Big D
Well-Known Member
- Joined
- May 5, 2009
- Messages
- 114
- Reaction score
- 32
New to us boat, 2002 Chaparral Sunests, has a Volvo Penta 8.1 & the dual prop out drive. Tach isn’t working and was told that it was a bad tach. Replaced it with a new autometer & still having issues. When you turn the key on, the tach responds but does not go to zero. With the engine running it just bounces around and does not seem to respond to engine RPM. Wiring is pretty basic, ground, hot line from key & wire from sending unit. Any idea what could be causing the issue? Should the wire from the sending unit show power when the engine is running?