I've been reading how to setup the plumbing from different sources.
Unlike most V8 setups, I'll be running a 12A rotary engine. 
The water jacket that surrounds the rotors, and has 1/4in holes
to slow down the water.   If they plug up, the motor will be toast very quickly.
The rotary also uses an oil cooler, as 1/3 of the cooling is from the oil.
I'm also considering adding an intercooler for the turbo.

What I think all this means is that I need to have pretty clean water
so nothing clogs up.   What I think I need is just a simple screen mesh filter,
and was thinking a Y strainer will do the job:

I'm concerned about how fast it will plug up, particularly if I go with a finer mesh, like 20 microns?
And will I get enough flow with such a filter?
It seems I will also want a pressure release valve as well in front of it if it blocks, something cheap and simple
like a water heater safety valve at 150psi, there are others at lower pressure too.
I have a JF pump, so the filter and pressure release can be put outside the hull.
I was even thinking maybe I could create a custom large huge screen filter instead of a tiny one as above to get more flow.
btw, is that a 1/2 NPT thread on the pump water outlet?


I understand the way to keep the flow up and pressure down is to not create any restrictions
in the engine area.  This might be hard for the rotary engine as described above.  It also uses some simple o-rings
to seal the rotor housings, I suspect these will not tolerate any high pressure water,
so should I consider a pressure bypass?    All this sounds like a lot of complicated plumbing. 

I appreciate any feedback.

I thought I'd start a topic on my boat project.
I'm one to do things differently, and this boat project is no exception.

My previous power boats have been outboards, but this time I want a jet boat.
I like to beach my boat and go into shallow water, and I want a nice swim platform in the back this time.
But also have kids and want an open bow. 
Not many of those with jet boats.   
Given the boat sits 99% of the time at my house. I didn't want too big of a boat either.

I'm also a cheap do-it-yourself bastard.  I picked up an 16ft open bow 1981 Marlin with 4-cyl I/O,
and decided to make this my jet project.  Sold the engine and outdrive for more than I paid for the boat,
and have allocated a meager $1,000 to build the jet version.

So cheap, fast, easy, pick two --- the two are cheap and easy.  Only looking for 40mph.

Anyway enough for now, I've been collecting parts, but the build won't start until spring.

Cheers,
JackB