water psi to high after installing imco shorty
 

I know this topic has been beat to death...

I have a 25 eliminator cat and just put a imco -2 shorty on it. The last 2 times I've used it I've blown a water hose after a top end pull. I'm assuming I have way to much water psi. I even removed the thermostat and it still did it. Who makes a water psi relief valve that works and is relatively inexpensive? I'm assuming I can put a t fitting into the water line before the pump, use a psi relief valve and plumb it outside the boat..

Has anyone else ran into this?

Other issue I have is that it be extremely difficult to put a sea strainer in because of the lack of room... suggestions?

My father had the same problem with the Phantom in my avatar, blew hoses. Here is a link whcih discusses the solution, post #8 in this link is spot-on.

http://www.offshoreonly.com/forums/g...ilge-pump.html

Another on the same topic:

http://www.offshoreonly.com/forums/g...placement.html

Here is the link for the valve you need

http://www.cpperformance.com/c-121-p...ef-valves.aspx

My father did the install, once the vale opens at 25 psi the water dumps, he routed the water out of the driver side of the boat to do a quick look to make make sure excess pressure is being dumped. The two links do a wat better job of describing the how-to then I can. Northing sucks more than blowing that recirculation hose in salt water, been there and done in the Ocean one summer day two years ago.

Question: did your father Purchase the 500.00 valve or did he use that t fitting and psi relief valve.. I think on the link u sent me I could buy the cheaper t fitting and psi valve for 100 bucks or so

My relief is on the strainer, plus we also had to weld up the intake port a bit to restrict it.

I'm pretty sure Mercury makes one also...

He bought the relief valve (T fitting) for less that $100. Now one thing that did happen the starboard valve did go bad and had to be replaced. F$479.00 you can buy the sea-strainer with the pressure relief valve built-in.

Look to others on the board who actually were hands on there for the install, and the success or drawback-failure they experienced in the installation and purchasing of the valve.

Monsta (OSO name on the board) on the board, a few years back replumbed Fountains that were experiencing high water pressure, he is a New York guy and is very knowledgeable on this topic, or call BWD (Brian) from the previous post, he is sharp.

Here is that strainer if you decide on a major replumbling.

http://www.cpperformance.com/p-13734...-strainer.aspx

The low cost option is to dump water thru the transom from the intake manifold. You can restrict the fitting at the intake manifold to vary the WP.

I had high water pressure issues with -2 Imco lower. I installed a valve from McMaster Carr T-eed into 1 1/4" hose coming from raw water pump to cross over.
water is dumped overboard via thu hull fitting pressure stays right aound 25 psi.






Extended-Life Adjustable Relief Valves


Combine the durability of thick walls and rugged construction with the convenience of adjustable pressure. Adjust set pressure within the range

Precision-Adjustable Valves

Use with water, diesel fuel, fuel oil, gasoline, hydraulic oil, and kerosene
Temp. Range: -60° to +450° F


Fine screw threads provide greater precision in pressure adjustments. Body and seal are bronze . Pipe connections are NPT; inlet is male (bottom port) and outlet is female (side port).







Pipe
Size
1"

part # 4703K56

$141.11

Extended-Life Adjustable Relief Valve Bronze Body, Precision Adj, 1 NPT



Pressure Range,15-25 psi

I welded up and reshaped the water inlet on my shorty. That eliminated most of the cav burn also.

Could you go with a through hull water pickup instead and not worry about what the shorty is doing. That way you could shape the intake to not have excessive pressure