[C320-list] Tachometer only works at startup

[Jeff Smith]

Clay,

Is it only your Tach or are all of your instruments on the cluster inop? I noticed my tach was operating intermittently (similar to what you suggested). It turns out my alternator was not working. Once I replaced my alternator, I got my tach back. I am less inclined to think this is the case if your hour meter still works. However, to rule that out as an issue, check voltage from your alternator. Especially if your alternator is the original Lucas alternator. 

Good luck,

Jeff
’94, #121

> On Mar 18, 2021, at 12:23 AM, Clay Carter <fclaycarter at yahoo.com> wrote:
> 
> I have a 1994 Perkins M30.  Tach works for about 2 seconds only at engine startup and then falls to 0.  With engine running the hour meter which is located in the tachometer continues working. Thoughts on what the issue might be?  The tach itself?  Sender?  (Is there a sender for the tach?)
> 
> Thanks for your input.
> 
> Clay Carter
> #225 We’ll Sea
> Alamitos Bay, CA