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-   -   Sea water strainer for engine intake - flat (http://www.sailnet.com/forums/gear-maintenance/61639-sea-water-strainer-engine-intake-flat.html)

jarcher 01-29-2010 11:49 AM

Sea water strainer for engine intake - flat
 
Hi All...

I'm looking for something like this:

West Marine: Cast Bronze Round Strainers Product Display 710&Ne=0&Ntt=strainer&Ntk=Primary Search&Ntx=mode matchallpartial&Nao=30&Ns=0&keyword=strainer&isLTo kenURL=true&storeNum=11&subdeptNum=70&classNum=217

But flat instead of domed. I have a strainer that sticks out like this one does. Very slow!

Thanks...

Jim

mitiempo 01-29-2010 01:06 PM

Jim
You're better off without a strainer over the through hull as they can clog easily and there is no way to clear them while in the water. A better idea is to install one of these inside to strain out debris. West Marine: Raw Water Strainer Product Display 710&Ne=0&Ntt=strainers&Ntk=Primary Search&Ntx=mode matchallpartial&Nao=0&Ns=0&keyword=strainers&isLTo kenURL=true&storeNum=11&subdeptNum=70&classNum=71
But there are better prices than West. Check Jamestown oe Defender.

sailingdog 01-29-2010 08:28 PM

I'd second what MiTiempo said. However, I'd recommend these strainers instead.

mitiempo 01-29-2010 08:43 PM

2 Attachment(s)
Here are a couple more, a Groco for less and a Sherwood for a lot less. There are lots to choose from and they don't all price like jewellery.:D

jarcher 01-30-2010 12:15 PM

Thanks everyone, my boat actually has an inline raw water strainer already, in addition to the cover over the intake.

So you guys just have a big hole to take the raw water in? I was worried something large could get sucked in that way. Its not a problem?

Thanks...

Jim

mitiempo 01-30-2010 02:17 PM

Jim
Both types can clog. But the strainer type can't be unplugged in the water easily. With the open type you can remove the inboard end of the hose and put a rod or smaller hose through to clear it. As long as the inboard end of the hose reaches above the waterline no water gets in the boat.

CaptnAl 01-30-2010 09:21 PM

Heresy Alert!
I don't have a strainer of any type in my raw water engine intake, and have not had a clog in the nine years of substantial sailing/racing on the upper Chesapeake. It may be very relevant that my boat has a saildrive, where the intake is a series of slots on the vertical drive section, located just aft of the keel. We do get grass caught on the keel leading edge, which is a frustration especially in a race, but none has made it into the engine intake.

Think Spring!

jarcher 05-05-2010 08:57 PM

Sorry to revive an old thread... I am getting considerable push back from the guys doing the bottom on leaving the strainer off. So I am posting here for moral support :laugher

Maine Sail 05-05-2010 09:09 PM

Quote:

Originally Posted by jarcher (Post 601067)
Sorry to revive an old thread... I am getting considerable push back from the guys doing the bottom on leaving the strainer off. So I am posting here for moral support :laugher

Having dealt with many a plugged external strainer I no longer use them. No fun diving with a coat hanger. We get LOTS of floating crap in the water during spring tides that reach up on our 3000+ miles of coast line and pull all the crap on the beach back into the bays. I instead bump my intakes to 1" and use sweep ells as opposed to 90's before the 1" Perko 0493 series strainer. This allows the vast percentage of the stuff to make it to the strainer.

Once eel grass or similar gets into a slotted or round strainer it becomes nearly impossible to remove unless you have the ability to open it. The round opening style was designed specifically for sailboats and the holes are far better than the slotted type are keeping stuff out. If you put one on definitely go for the Groco round opening type. They are cheaper at Hamilton.


PS If you use a "scoop" strainer be sure to face it aft so it is not in "scoop" mode. The forward orientation is for power boats.

jarcher 05-05-2010 09:55 PM

Thanks MS, my primary concern is with reducing drag. So I'm thinking no scoop is the way to go. But the thru hull does stick out a bit :-(


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