Just for shchitzengiggles I thought I'd ask these questions:

What kind of hose?

What kind of fittings?

What size line from your tanks to your fuel pump?

From the fuel pump to the carb?

What size water line are you running from your pump to the inlet side of your motor?

What happens with the outgoing water?

Header control valve?

Where do you get the water for the header control valve?


The reason I'm asking is that I'm going to redo the plumbing in my boat, I've looked at hundreds of pics online for ideas, just curious as to how you guys did it.
Thanks
Skip

Here's the way I have it set up right now, the 1/2" is -8, the 1/4 ID is actually 3/8" ID or -6

My fuel lines are all -6

I get what you're saying about the header water, but I can assure you I barely crack the valve it sits about 1/2 way between OFF and LOW, very little water, more like very little steam out of my pipes, just enough to show the coppers I'm running water.

Great thread, i too am going to be re plumbing everything in my boat soon. Looking forward to seeing what everyone is using.  Some pics would be great too 

hay Skip, what kind of motor and horsepower? What kind of exhaust?

BBC, 500HP on a damn good day, Bassett O/T headers.

Just did mine last season.

Fuel, -8 from tanks to fuel rail, all fuel from tanks to motor fuel is -8 , Just added a balance hose between both tanks,its a -20. A Y from the fuel reg and 2 -6 lines returning to each tank.

Water, -12 from pump to sea strainer there is a -12 t in between the pump and strainer for a garden hose connection so it will feed both the pump and strainer when ran at home., then 2 -10 to motor from strainer, 1 -12 to oil cooler from strainer for water then dump,1 -10 to water pressure bypass regulater from strainer then dump, and 2 -10 dumps from block, both sides of hull, exiting middle side of hull, dry exhaust.

Oil is all - 12. ran a oil filter bypass witch mounts on the front of block so 1 -12 from the block to the cooler then to the filter then back to the block. I might have it going though the filter then to cooler, forgot.

I used all xrp hose ends and fittings, aeroquip steel braided hose. I also ran all y blocks instead of T's to insure better flow at all split's except for the t for running at home.

There was a lot to my set up Ill post a few pics tom