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Inop tachometers. Again.

C

Chrisvr6

Member
Don't understand how these tachs of mine don't ever work. My newest 2yr old tach just stopped working. Anyone know of a better alternative? Digital maybe?
 
how about a little history?

Engine size, year, ect ect ect.


We dont have any idea about your tachs past or present............typically they work for many years.

What brand was the original? what brand is the replacement?

Have you tried switching the pulse setting on the back of the gauge from the current setting to another and then back to re-establish the setting?

If it failed completely have you tried shorting ground to sender (very briefly) with the key on while watching the gauge to see if the needle moves/pegs?



So many questions and so few details................
 
2002 mercruiser 5.0 mpi. Aaaannnd a 2 beeps per minute alarm that i can't figure out. About to swap ecms with the other motor. Did the iac and wps already. Wondering if these tachs have something to do with it. Searay tachs with just a plug in back. No 4,6,8 switch or any posts or terminals. They do bounce around a little sometimes. Especially if i tap the glass.
 
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