At idle and low RPM my port engine tach works fine. At high RPM and higher RPM cruise it often "bounces" or will cut out and go to "zero". Is the problem usually the tach, the connections or the sending unit on the engine? I have Mercury 250hp EFI Offshores. (2 strokes of course)
tach needle bouncing
- Thread starter bhemi
- Start date
plymouthgrady
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Check connections at the sender too as well as at the console. It can be a bad signal wire as well as a ground.
If you rev the motor in neutral and it doesn't happen, the problem is probably not at the motor end.
Try wiggling the connections while the motor is reved up a bit in neutral to see if you can locate a bad connection.
If you rev the motor in neutral and it doesn't happen, the problem is probably not at the motor end.
Try wiggling the connections while the motor is reved up a bit in neutral to see if you can locate a bad connection.
Analog
The tachs are Merc tachs the same age as my engines (1998). thanks for the tips guys. i will try them all and get back to you.
The tachs are Merc tachs the same age as my engines (1998). thanks for the tips guys. i will try them all and get back to you.