[C320-list] knot meter

[David Marecek]

I had this problem on my previous Catalina 28 on the ST50.

Before ripping things out, I would check that the problem is the
transducer.  I removed mine from the hull, and then scored the wires
from the transducer about 12 inches away so I could put a multimeter on
the unit and spin the paddles to confirm if a current was induced.

Turns out the transducer was fine and my instrument cluster need a SW
reboot( some magic code held by factory technicians).

However I also found some new and used units on Ebay once I figured out
what needed replacing.

Dave Marecek 
250 516 5117

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Jeff
Church
Sent: Tuesday, April 07, 2009 4:58 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] knot meter

Ed,

I installed a transducer last year for a friend who has an older C36. 
The transducer was a discontinued model, probably ST50. I'll try to find

out where he got it. Splicing the new unit into the existing wires was 
very easy.

JeffC


Ed Edwards wrote:
> Does anyone have experience replacing the paddle transducer on an
Autohelm
> ST 50 Plus Speed package?  My knot meter failed this past winter, all
> functions appear to be working except it won't register speed and
associated
> info.  When I had the bottom painted last month the knot meter worked
when I
> used a leaf blower to rotate the paddle wheel.  It didn't work when I
went
> back in the water.  According to Raymarine's web site, this is
symptomatic
> of water in the unit.  Autohelm is no more, Raymarine doesn't deal
with
> transducers.  They suggested that I contact Gemeco.com, a transducer
> wholesaler.  Gemeco's website is for wholesaler.  I've got an e-mail
into
> them but I think it is a deadend.
>
> Raymarines troublshooting site says that the ST50 transducer can be
replaced
> with an ST60 transducer.  It requires a junction box.  The parts
numbers
> they gave were obsolete.
>
> I'm pretty sure the ST60 transducer is available, the big question is-
*Can
> I get a splice kit to connect the ST60 to my existing ST50  wiring?*
There
> are already so many wires and so much caulking in the pedestal tubing
that
> nothing else is going in or coming out.
>
>