[C320-list] engine anti-siphon valve question

[Dave Ouimette]

Jeff (and anyone else),
 
My boat is a 1995 model and has a Perkins M-30 engine. I have seen in later models the anti-siphon valve is as you suggested...placed high in the aft port side locker. But the 1995 manual shows it to be located inside the engine compartment, port side. Even mounted as high as possible, there appears to be only 5-6 inches or so clearance above waterline. I have heard from one other owner of a C320 who has an anti-siphon valve in that location and he says it works. I'm not real comfortable with this because, as I understand it, you may not know it doesn't work until a vane breaks off in the raw water pump allowing seawater to pass and (maybe) setting up siphon action.  I don't know if the Perkins raw water pump can handle pumping water the added distance if the valve is moved to the port side lazarette. Anyone have further ideas about this? Is my concern real?   
 
 
-----Original Message-----
From: Jeff Hare <Catalina at thehares.com>
To: C320-List <C320-List at Catalina320.com>
Sent: Thu, Oct 1, 2015 5:49 am
Subject: Re: [C320-list] alternator question and anti-siphon valve


There should not be an anti-siphon on the raw water intake line (between the
thru-hull and the raw water pump).  
The anti-siphon I think goes in the line
between the engine and where it connects to the exhaust elbow.  Typically this
is mounted high up on the outside wall in the large port side locker.  That's at
least how I've seen it in the newer models.

-Jeff
-----Original
Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com]
On Behalf Of Dave Ouimette
Sent: Wednesday, September 30, 2015 10:02 PM
To:
C320-List at Catalina320.com
Subject: Re: [C320-list] alternator question and
anti-siphon valve


Warren and Patty,
 
I have investigated this further
and found the WPS alternator I have is a 70 amp, internal regulated, external
fan model. I was thinking of replacing it but now, probably won't. It is working
OK and the output should be sufficient for my needs.
 
On a different note, my
boat does not have an anti-siphon valve on the raw water intake. Someone remove
it in the past and I don't know why. My rough measurement suggests it would only
be about 5 inches or so above the water line when positioned as suggested in the
C320 manual, and that's not much. Do you have any thoughts on this?
 
Thanks
for the reply.
Dave
No. 174
 
 
-----Original Message-----
From: Warren
Updike <wupdike at hotmail.com>
To: C320-List <C320-List at Catalina320.com>
Sent:
Wed, Sep 30, 2015 3:36 pm
Subject: Re: [C320-list] alternator
question


Dave, I presume you have the Perkins M30 engine as do I. The shop
manual (on the web site) says the original is a Lucas A127, 55Amp. It doesn't
look like the WPS is a direct replacement for the A127; but, that doesn't mean
it won't work. I don't know what the "IR/EF" means. I did see that there is an
external regulator for the WPS. I don't know if you can find a direct
replacement with external regulation. Call a supplier and discuss it with them.
That said, if you buy a new alt vs repair the existing Lucas I highly recommend
going with external regulation and a larger output. Once the Lucas reaches
operating temperature you'll likely only get about 35A out of it, so the way you
use your boat can largely determine your best course of action. 

The M30 does
not conform to US
auto standards for alternator mounts. I could not find a
hi-output alt that was a direct replacement for the Lucas; and, therefore had to
modify the engine mount and the adjusting arm. 

You will need to pay
attention to the pulley ratio (crankshaft pulley diameter vs the alternator
pulley.} There are charts available for this. The pulley ratio will determine
how much output you'll get at different rpm. Also, the largest alt you can
expect to run on the M30 with the 3/8" belt is about 100A. I run mine at about
80A via the external regulator.


A number of years ago I replaced the Lucas
with a larger, externally regulated hi-output alternator, and have never been
sorry. I have pictures and a document on the project I'm happy to send if you
contact me off-list. 

I'm
not expert on alternators, only on what I did.
Jeff H. is the expert as far as I'm concerned.

Warren and Pattie Updike
1994
C320 "Warr de Mar"
#62


-----Original Message-----
From: Dave
Ouimette
[mailto:drouimette at aol.com]
Sent: Saturday, September 26, 2015 6:59
PM
To:
c320-list at catalina320.com
Subject: [C320-list] alternator
question



The
alternator on my recently purchased 1995, C320 has WPS and
model no. 12088n on
the nameplate. When I google that name and model it appears
this is a
replacement for the original Lucas alternator. Does that sound
correct? Is the
original model listed below? I am also trying to figure out if
the WPS
alternator has an internal or external regulator. Any ideas?

Thanks.

Dave
Hull 174
 
12088N – WPS 
Alternator – Lucas IR/EF 70
Amp/12
Volt, CW
Replaces:
Lucas 24129, 24129, 24158, 24209, 24242, 24245,
24291,
24294
54022191, 54022193, 54022220, 54022229, 54022242, 54022244,
54022255,
54022262, 54022282, 54022306, 54022382, 54022383, 54022395, 54022408,
54022437,
54022452, 54022483, 54022536
Used On:
Case, Ford Tractor, Massey
Ferguson,
Perkins