mercruiser water pressure relief valve question
#11
Depends. If you are measuring on the outlet side if the stat you will not be getting a true reading. Try to use a port on the intake or or block for your gauge. Put the valve right before your cir pump.
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Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
#12
Registered
Thread Starter
The valve on the other hand, i'm curious the theory on placement on that. If it's before the circulation pump, the higher water pressure would be going through the sea pump, and oil cooler, then brought down to 25lbs potentially for the engine/exhaust; correct? Maybe the higher water pressure would help keep the oil cooler more efficient?
I'd like to get my oil temps lowwer, however i was told I have the sender in the wrong spot for that as well (currently in my remote oil filter housing). I was told to move that in a block port above the block filter pad. I havn't looked at that location yet, but I have a feeling one of two oil temp senders is there.
#15
Registered
Thread Starter
Alright, I'm confused now. I took a look at my set-up, and I do have the merc valve between the sea water pump and the oil cooler, however that hose is on the bottom fitting of the sea pump. The top fitting goes to the drive. I looked up the parts diagram a couple of days ago and it showed the bottom going to the drive??? So what gives? I ran it that way all last summer with no problems......... Are the hoses on the sea water pump backwards?
#16
Charter Member # 55
Charter Member
The water going the seapump goes in one inlet for a LH rotation engine and goes in the other inlet for a RH rotation engine. If you have good water flow then the way you have it is correct.
So where is the valve dumping the water????
So where is the valve dumping the water????
#17
No, it starts opening before the 25 psi. Gradually opening. It's not a pop off valve as you are thinking like the saftey valve on your home water heater.
I welded a peice of 1" SS tubing into the outlet side of my silent choice divetor valves right behind the pivoting plate that I dump the water into. Didn't want to install any thru hull dump fittings.
I welded a peice of 1" SS tubing into the outlet side of my silent choice divetor valves right behind the pivoting plate that I dump the water into. Didn't want to install any thru hull dump fittings.
This is typical of a spring-operated relief. We also use pilot-actuated relief valves which stay shut hard until a precise pressure is reached. When the valve is desisgned to stay open and not reseat until a lower pressure like on a nuclear high pressure system, that's called the "blowdown" value. Now that we're bored to tears, back to the regular program
#18
Registered
iTrader: (1)
Hey Jerry....
This guy needs your help with the spring number. Tried to PM you but it didn't work.
Terry
Easyrider1340.
I would appreciate your assistance in getting a part # from US1 Fountain. His profile would not let me Priv Message him. I just saw your name as one of his friends. If you could PM him my message since you are one of his friends I would be grateful.
He knows a part number for softer springs for the Mercury engine cooling relief valve # 863208A3. He stated on a post long ago that he had replaced the mercury standard spring, set at 25psi, with a lighter spring, to reduce his engine block water pressure. He stated McMaster Carr but i need the part number.
KLarson @ FirestoneLC.com, or if he can he could Priv message me if it will allow it.
thanks for your help.
Kurt Larson
Lake Charles, La
This guy needs your help with the spring number. Tried to PM you but it didn't work.
Terry
Easyrider1340.
I would appreciate your assistance in getting a part # from US1 Fountain. His profile would not let me Priv Message him. I just saw your name as one of his friends. If you could PM him my message since you are one of his friends I would be grateful.
He knows a part number for softer springs for the Mercury engine cooling relief valve # 863208A3. He stated on a post long ago that he had replaced the mercury standard spring, set at 25psi, with a lighter spring, to reduce his engine block water pressure. He stated McMaster Carr but i need the part number.
KLarson @ FirestoneLC.com, or if he can he could Priv message me if it will allow it.
thanks for your help.
Kurt Larson
Lake Charles, La