[C320-list] New Tachometer

[Graeme Clark]

The yanmar works from a magnetic pickup off the flywheel. It is located just forward of the transmission casing to the port side of the center line. 
I had the same problem. I tried wiggling the contacts and pulling them on and off to no avail. Eventually I used some fine sandpaper to clean the terminals thoroughly and some pliers to crimp the push on connectors a bit tighter. After that it all worked again
The signal from the pickup is very weak so the slightest poor connection or electrical interference can stop it working

The alternator based rachis are used on other engines like Westerbeke I think?

Graeme
#366, 1996

Sent from mobile: please excuse typos etc.!


> On 11 Sep 2016, at 00:07, Chris Burti <clburti at gmail.com> wrote:
> 
> Please keep us posted on what you find out and take a picture. Mine has quit but the hour meter still works. Since I'm already on our second tachometer, it would be nice if there was an easy fix. 
> 
> Best Regards,
> Chris Burti
> Commitment, #867 
> 
>> On Sep 10, 2016, at 6:52 PM, John Frost <john at frostnet.net> wrote:
>> 
>> Immediately after I did some puttering around the transmission of my 2007
>> Yanmar 3YM30, the tachometer stopped working.
>> As I put transmission in and out of gear it works momentarily. I assume I
>> have a loose wire on the engine pickup?
>> I have read that the pickup comes from the alternator. Others say a
>> magnetic sensor by the flywheel (which is where I was working). Does anybody
>> know?
>> 
>>                                        +
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>> -----Original Message-----
>> From: c320-list-bounces at lists.catalina320.com
>> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Walter
>> Schaffer
>> Sent: Tuesday, August 27, 2013 9:13 AM
>> To: C320-List at Catalina320.com
>> Subject: Re: [C320-list] New Tachometer
>> 
>> FYI, info on tweaking TACH fixed the problem... Tks for suggestion, it save
>> me $120.00
>> 
>> Walt, Bohemian II, 515
>> 
>> 
>> ________________________________
>> From: Doug Treff <doug at treff.us>
>> To: C320-List at catalina320.com
>> Sent: Saturday, August 17, 2013 8:29 AM
>> Subject: Re: [C320-list] New Tachometer
>> 
>> 
>> I second Gary's suggestion. Worked for me. I did this a year ago and 
>> it's still working great!
>> 
>> ---
>> Doug Treff
>> doug at treff.us
>> 
>>> On 2013-08-16 17:48, Gary Malcolmson wrote:
>>> Walt,
>>> 
>>> I recently had a similar issue with the tach on my 2003 C310.  From a
>>> message from Warren Updike on this C320 List I called Dennis Igarashi
>>> who was previously with Seaward in Whittier, CA, and who has now set
>>> up his own business, I think covering the Seward electrical items
>>> (panels, instruments and harnesses).  In my case Dennis suggested that
>>> I move the adjustment screw on the back of the tach a few times
>>> back-and-forth; then return it back to it's original setting.  This
>>> seemed to clean the internal contact and returned my tach back to
>>> working correctly.
>> 
>>