[C320-list] alternator question and anti-siphon valve

[Jeff Hare]

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