Sea strainer plumbing
#1
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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
#3
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Strainer to crossover? Where is the sea pump in all this?
#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.
#8
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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.
![](https://cimg3.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/923x692/strainer_1_b228dffb482c41cbf5960ddf6960dfdeb8789058.jpg)
#9
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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.
#10
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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.