[C320-list] Intermittent Tachometer Operation

[surprise thompson87.com]

The Yanmar 3GM30F engines use a tach pickup on the flywheel housing, and I suspect the newer engines are similar. 

> On Oct 1, 2023, at 2:47 PM, 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