Perko Weed Guards for Intake Water Strainers
 

http://www.jamestowndistributors.com...ater+Strainers

Has anyone used these perko weed guards? I'm looking at installing with a seacock for the bait well. I'm curious if this is just the guard or it includes the thru-hull. The description has me a bit lost.

Includes the threaded thru hull. Saw it at West Marine.

thank you appreciate the info

That is a pretty standard scoop we use in marine air conditioning, sea cock is extra. Running long periods, like air conditioners do, these will pull plenty of grass into the sea strainer(if there is one) or into the pump if not. If you are planning to use the bait well for short periods, its probably ok, If you have a lot of grass and intend to run the bait well for several days, get a strainer.

The scoop also helps keep the pump pumping while under way. Without one, the venturi effect can suck air back into the pump. A centrifugal pump (most pumps are centrifugal) won't pump squat with even a little bit of air in it.

I have grass around and run mine overnight with no issues, maybe depnds on the grass maybe you won't either

We get some eel grass around here but not too bad. I'm not worried about clogging it up, I'm more interested in the being able to feed my bait well and washdown pump while running.

And more importantly making sure when I order my parts I get everything I need to finish the project. As I work a rotation down in the oil patch

might want one of the under hull strainers for bait well it has a larger area that will scoop that water even whan underway

Pretty sure I have that one on the bottom of my 25. It looks huge, and it is near the keel. It is required to have something besides the pickup in the I/O for water, but this looks kind of big.

Do these affect trim/planing?

i run a round strainer that is entirely separate from thru hull. I teed off the thru hull one side goes to livewell pump, other to nothing right now capped off, but soon a washdown. used all groco on the Tee and step down sizing pieces, to the livewell pump. make sure its flanged seacock.

I asked the pros at cape and island boat works when they do thru hulls for downeast boats, they did not like the strainer you show-reason it forces a lot of water into the thru hull when running. we run faster than a downeast so that style is really putting more water pressure on the intake. the round type strainer I have still brings plenty of water in trust me. this shows a style I used:

http://www.jamestowndistributors.com...Round+Strainer

my thru hull is on the lowest dead rise panel, but that's more due to the fact I don't have a lot of options. not sure about mounting it on the middle panel I did not have the option so never gave it thought. used a piece of left over Penske from Pat's(Wildman) minty green 23 rebuild, 45 degree bevel on edges better for glassing, triangle shaped to mimic the thru hull flange shape, looks like a home plate shape. then glassed over with CSM, then 1708, maybe 2 layers 1708 I forget. used epoxy. its nerve racking drilling a hole in the hull bottom. I gave a few bucks to a pro in the garage next door to ease my mind off hours, over a couple beers.

yeah it must have some impact on speed I guess. nothing I could notice. and mine being a round strainer with holes all around it lets water pass out much more easily when not running the livewell. makes sense think about the hydrodynamics. I did coat it with my epoxy bottom paint inside and out. prob overkill. and since it is separate, I can remove it and its not attached to the thru hull.

for the intake I used one of these full flanged seacocks BV series I think: http://www.groco.net/

if you want a pic will be working on boat later and can take a shot inside of hull and outside.

I have one of those in 3/4" feeding my bait well and raw water washdown pump. When the boat is on plane, it picks up enough water to fill the live well with the pump turned off. I have a sea cock at the pick-up for safety, and a ball valve downstream of the live well pump for throttling flow or shutting it off altogether. I also have a small strainer before the wash down pump. The system works well.
Dave