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  #151   IP: 174.255.128.42
Old 08-05-2020, 03:36 PM
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I found this in my spare parts bin that came with the replacement A4 will it suffice?

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  #152   IP: 71.222.36.208
Old 08-05-2020, 11:06 PM
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Quote:
Originally Posted by Ando View Post
I found this in my spare parts bin that came with the replacement A4 will it suffice?
IMHO... yes as a temporary solution.
I would urge (when you get the boat buck$) to get a proper strainer though.

Also, definitely replace those plastic hose barbs.
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  #153   IP: 24.152.132.140
Old Yesterday, 01:11 AM
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My suggestion of a raw water strainer was instead of the external strainer. Rather than install the wimpy one you have on hand, maybe make a real project out of it and source a robust, high volume strainer (I like the Groco ARG strainers, mine is pictured) and install it as part of a thru-hull replacement* at the next haul out.

Do it right, cry once.

Your pictured engine intake thru-hull looks factory original to me and if it is, I'd be shocked if it were 3/4" (pipe size). Catalina typically used 1/2" thru-hulls for their A4 engine intakes, mine was and its inside diameter is ridiculously small for a locale with marine growth. Remember, the outside diameter for 1/2" pipe size physically measures 7/8". Also, 1/2" thru-hulls are too small to be able to get bottom paint inside.

Check out this web page for an excellent treatment on what I'm talking about:
https://pbase.com/mainecruising/external_strainers


*My experience is Catalina used engine intake thru-hulls with an integral external grate requiring complete thru-hull replacement to get rid of it. Some builders fitted separate grates over the thru-hull, not Catalina.
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  #154   IP: 71.222.36.208
Old Yesterday, 09:41 AM
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As Neil points out, my 1979 built Ranger had an original thru hull of 1/2".
When I replaced it I upgraded to 3/4.
Note the difference between the 2 pictures below of the "flow capacity".
That's the cooling difference to your engine.
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  #155   IP: 174.255.132.134
Old Yesterday, 12:55 PM
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Whoa?!?

Roadnsky, thatís quite a pic. Thank you. I did shove a rebar down the thru-hull and, though I didnít leave the valve open for too long, the rate of flow seemed to be really good (if I left it, I could envision the rate of about 17gallons a minute as Ken I think mentioned in another thread).

But I havenít look down the thru-hull with my own eye and so I will have that pic engrained in my brain until I do...thx again.
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  #156   IP: 174.255.132.134
Old Yesterday, 01:19 PM
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Quote:
Originally Posted by ndutton View Post
My suggestion of a raw water strainer was instead of the external strainer.
I see, ok got it...no internal strainer until the next haul out (at which time the external strainer will be removed and the area under it coated with bottom paint. In the meantime, Iíll ensure my diver shoves a screw driver in there every month.

Iíll also double check that thru-hull diameter.

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Check out this web page for an excellent treatment on what I'm talking about:
https://pbase.com/mainecruising/external_strainers
Wow, that website was very informative. Thx.
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  #157   IP: 100.36.65.17
Old Yesterday, 02:04 PM
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Quote:
Originally Posted by ndutton View Post
...
Check out this web page for an excellent treatment on what I'm talking about:
https://pbase.com/mainecruising/external_strainers

...

Just a quick note:

A few years ago, Maine Sail changed his domain name from https://pbase.com/mainecruising/boat_projects to https://marinehowto.com/. The old domain is still up for now, but I don't think any new material is being added to it.
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Last edited by edwardc; Yesterday at 05:54 PM. Reason: Used full old URL
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  #158   IP: 24.152.132.140
Old Yesterday, 03:20 PM
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Quote:
Originally Posted by edwardc View Post
Just a quick note:

A few years ago, Maine Sail changed his domain name from https://pbase.com/ to https://marinehowto.com/. The old domain is still up for now, but I don't think any new material is being added to it.
Just this sailor's opinion, much if not most of Maine Sail's articles are outstanding but remember they are his opinions and in some cases are self serving promotion of his business. The discriminating reader should decide for himself what applies to his particular boat and circumstance the same as any other information source.
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