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

[Warren]

Jeff is correct. On the older models with Perkins M30 the anti-siphon is 
located in the engine compartment on the wall of the refer to port of the 
alternator. On our #62, it is between the raw water pump and the input to 
the heat exchanger. I make sure the duck-bill valve is pliable and able to 
open with reasonable pressure. Never had a problem. You should have one 
between the exhaust elbow and raw water pump.

On Wednesday, September 30, 2015 at 10:01:57 PM UTC-4, Dave Ouimette wrote:
>
>
> 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 
>
>
>
>
>   
>