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conrad4784

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Im still working on my overheating issue went to the dealer to try to get a poppit valve that opens with less pressure and they no idea what I was talking about. Anyone have a part number for it I believe I read its a 7LB tension valve. My engine is a 2006 250 HP etec E250DCZSDR. Im also looking for high flow intake screen part numbers. thank you
 
PhilH12

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Reply with quote  #2 
You may want to ask for a "lighter spring" for your Pressure Relief Valve, if available.  I'd be getting a Parts Manual for your motor, also.  Experts can chime in on Hi-Flow intakes, again, if they are available for your motor.

Phil

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20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
olypopper

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Reply with quote  #3 
Your engine should already be equipped with a 7.2 pound spring, part number 348820.  Has it ever had the pressure relief valve changed for any reason?  

Water intake kit for your engine is 5005063 for the hi flow.  Ultra high flow is 5006337 and if you have some type of severe aeration problem with your water flow, you can run 5007081

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conrad4784

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Reply with quote  #4 
I just bought the boat so I have no idea of it has ever been replaced. The engine idles fine so I'm guessing it is working. Will replacing it help temp at higher speed
olypopper

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Reply with quote  #5 
"The engine idles fine so I'm guessing it is working"

The engine's idle quality has nothing to do with the pressure relief valve.  What is your specific problem you are having with your engine?

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conrad4784

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Reply with quote  #6 
It's overheating at higher rpm. Took it out last week it over heated after 10 minutes at rpm around 4200rpm. Replaced the thermostats and took it out over heat light at about 1hr at rpm 4200. Idle a minute and it goes away the comes back after 5 minutes of cruising on plane.
Evinrude

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Reply with quote  #7 
First off you need to install a water pressure gauge and see what your water pressure is at the RPM's that your overheating at. Also install a clear hose from the top of the block to the emm and make sure there are no air bubbles going thru. Make sure your temps are correct. Shoot it with a temp gun and compare the reading shown on diag to make sure they are correct. At that point you can play with different springs. Like stated you should already have the 7.2 installed. There is no lighter spring. The next closet spring is 9.6 which is heaver.
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conrad4784

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Reply with quote  #8 
I have a water pressure gauge just not sure where to install it. Thank you for the reply
olypopper

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Reply with quote  #9 
The back of the block is a good place to install the pressure gauge.  There are two places and one should be unused and plugged off.  Use that one.  Test your engine in 500 RPM increments and see what your readings are and post them here. 
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seahorse

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Reply with quote  #10 
There is a threaded plug on the back of the engine. If you have an early production  model engine, you may have to drill and tap for the pressure fitting.
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conrad4784

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Reply with quote  #11 
Thank you for the replys I have port available on the back of the motor which I will install a psi guage.  Does anyone have the psi reading I should be getting per 500rpm increments?  Also I did notice a sensor fault light on the emm when I was running it which went away after 30min of idling in a vinegar/ Water mixture to remove salt deposits.  NOt sure what sensor it was refering to.  Ran the vinegar water mixture for 2 hours the water temp in the tank went from 85 degrees to 115 but the engine temp actually looked like it went down after it had warmed up by 5 degrees.
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