Sea strainer plumbing
01-19-2019, 12:29 PM
#1
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Thread Starter
Sea strainer plumbing
I am trying to figure out my sea strainer plumbing. Unclear about a few things.
I have transom mounted pickups to strainer Inlet with shutoff. Then comes something I don't get. I would be taking strainer out to the pump and pump to crossover, but for some reason, the strainers are set up with a Tee on the out side withe double 1 1/4" outlets. I don't get why two of them. I was thinking maybe they each go directly to the front engine ports but too big?
This is a twin small block Chevy setup with 2 strainers.
Also, with mercruiser pumps I suspect I need a pressure releif? I intend to run without thermostat until I find it won't work. Where should pressure relief be without and with thermostat?
I'll have a dump from the trans coolers and hope to include releif dump together with it.
Thanks for any help.
I have transom mounted pickups to strainer Inlet with shutoff. Then comes something I don't get. I would be taking strainer out to the pump and pump to crossover, but for some reason, the strainers are set up with a Tee on the out side withe double 1 1/4" outlets. I don't get why two of them. I was thinking maybe they each go directly to the front engine ports but too big?
This is a twin small block Chevy setup with 2 strainers.
Also, with mercruiser pumps I suspect I need a pressure releif? I intend to run without thermostat until I find it won't work. Where should pressure relief be without and with thermostat?
I'll have a dump from the trans coolers and hope to include releif dump together with it.
Thanks for any help.
Last edited by ttrm007; 01-20-2019 at 08:35 PM. Reason: Correction - left pump out of description
01-20-2019, 01:22 AM
#2
Charter Member # 55
Charter Member
Water enters strainers on top fitting and goes to engine from bottom fitting.
The T could be for a pressure bypass or for a fresh water flush connection.
The T could be for a pressure bypass or for a fresh water flush connection.
01-20-2019, 01:31 PM
#3
Registered
Strainer to crossover? Where is the sea pump in all this?
01-20-2019, 03:04 PM
#4
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Seems a little odd for hose plumbing having the strainers mounted on the transom rather than the bulkhead. Regardless I'm assuming this is a barbed T or is it threaded. Either way aside from a pressure relief is it possible the T fed direct to both left and right side of block if running an open system with no stat.
01-20-2019, 08:17 PM
#8
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Thread Starter
Here are a few pics. As you can see in the pictures, the ends are threaded vs. barbed but I do know the hoses were actually clamped on the threads! I'm obviously changing to barbed fittings. Just trying to decide if and for what reason I need 2 on the output side. 
01-20-2019, 08:38 PM
#9
Registered
Just looks like someone added to suit there needs for who knows what particular reason. I'd just remove the T and replace with a 90 or what ever works out best for routing etc. Not sure if your going to install pressure relief valves or not. Personally I wouldn't bother if your running stock mags or 330's.
01-20-2019, 08:51 PM
#10
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Thread Starter
Just looks like someone added to suit there needs for who knows what particular reason. I'd just remove the T and replace with a 90 or what ever works out best for routing etc. Not sure if your going to install pressure relief valves or not. Personally I wouldn't bother if your running stock mags or 330's.
