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Water Preesure HELP!

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Old 05-10-2011, 07:51 AM
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Default Water Preesure HELP!

Ive recenty went from -2 imco to -3 and have experienced high water pressure. When im running say under 80 its fine, around 20-25 psi but once I get over 100 its like 35+. Im worried i might push a head gasket to far. Ive heard of adding dumps but im not sure how. any info is appreciated.

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Phill
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Old 05-10-2011, 12:44 PM
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You need pressure relief valves added. I put mine in after the sea pump but before all the coolers.
Eddie Marine sells them:
http://www.eddiemarine.com/store/car...&p=13372&c=238
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Old 05-10-2011, 01:16 PM
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Quote:
Originally Posted by JasonSmith View Post
You need pressure relief valves added. I put mine in after the sea pump but before all the coolers.
Eddie Marine sells them:
http://www.eddiemarine.com/store/car...&p=13372&c=238
An OSO member has some new, but old stock relief valves for sale. Contact Rob: [email protected]
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Old 05-10-2011, 01:28 PM
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Thanks John!
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Old 05-10-2011, 05:01 PM
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Does anybody have a kit for 500 efi's
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Old 05-10-2011, 05:09 PM
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Do not think there is a kit. Just purchase the relief valve, plumb it in the hose coming out of the engine water pump, then run dump line out side or back of boat. I used the relief valves made by merc., a little expensive, but way cheeper than replacing a head gasket.

Make sure that winter layup includes draining the dump line at the relief valve.

Merc
Water pressure relief valve
863208a3

Last edited by Sport 280; 05-10-2011 at 05:23 PM.
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Old 05-24-2011, 02:04 PM
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My Merc water pressure relief valve is connected inline of the water from the drive to the sea water pump. Is this not the way it should be?
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Old 05-24-2011, 02:06 PM
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Mine are right before the circ. pump. Using teh Merc valves. Those things are worth their weight in gold. And priced so too!
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Old 05-24-2011, 02:24 PM
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Anyone have any specific installation procedures for these valves that show where they are supposed to be? I'm wondering if it really matters.......
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Old 05-24-2011, 05:51 PM
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i just ordered the one from Eddie Marine. Save yourself $30 and order it from hardin marine.
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