[C320-list] Intermittent Tachometer Operation

[Ferris Wills]

Hi,

I had the same issue on my yanmar (hull 505) - There is a sender wire accessed from the back of the engine. After cleaning up that connection, my tachometer started reading nice and steady.

Look in the yanmar manual to find the exact location of the sender.

Ferris

Typos by iPhone

> On Oct 1, 2023, at 11:47 AM, Ian Neale via C320-list <c320-list at lists.catalina320.com> wrote:
> 
> Hi,
> 
> I have an 07 320 with a Yanmar 3YM30 engine. 
> 
> The tachometer is intermittent in operation where at times the needle goes back to zero while the engine is running. 
> 
> I think the tachometer runs off the alternator, but not sure. Wiggling wires on the back of the alternator doesn’t seem to fix the problem. 
> 
> I have also cleaned all connections in the back of the tachometer. 
> 
> Any suggestions as to what could be the problem.
> 
> Thanks, Ian Neale. 
> 
> Solutions.  
> 
> Sent from. my iPhone