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Old 05-31-2017, 02:38 PM   #21
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City: Paris,TN
Vessel Name: Slo-Poke
Vessel Model: Jorgensen custom 44
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Originally Posted by LarryM View Post
Island15

It sounds like you may be a candidate for a Groco 6 Port Fuel Valve.



This switches both the supply and return with a single lever and will permanently prevent the overflow you experienced. One valve, one handle, easy peasy
That's exactly what I need . I have 5 tanks and valves scattered out everywhere. I just had a problem a few weeks back when I opened a valve by mistake and sucked one tank dry a almost overfilled another and wound up with air in the lines that shut me down .
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Old 05-31-2017, 07:31 PM   #22
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City: Shelter Bay
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The problem is I have no way to get the fuel back into the port tank.
There is only the valve for the fuel supply and fill hose! Is there something I'm missing?
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Old 05-31-2017, 07:52 PM   #23
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City: Wrangell, Alaska
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I don't think all Fords/Lehmans are plumbed the same. Last one I had in my shop for a rebuild I bench ran it and if I remember right it had a fair amount of return flow.

It's normal practice in the diesel world to have a drilled orifice or pressure control valve from injector pump to return. If you don't have that, it will not naturally purge air and can lead to stalling. On other engines like that (Yanmar GM) I have custom made a bleed rig to the return to get rid of the air problem.
Can't speak for the Sp120, but for my SP135 it returns a significant amount of fuel. I've heard it's about 10x the amount it acutally uses and this seems correct to me.

My return lines go to a "T" and then another "T" at the top of each tank at the top of the sight tube.

Thus if I have the top of the sight tube open, fuel will fill the sight tube in less than 10 seconds. I keep that valve (top of sight tube) closed for that reason when underway as I want the fuel to return to the tank.

This aids significantly in keeping cool fuel going to the engine and aids filtering of the entire tank.

I keep the return of the tank I am feeding from open and the other tank closed. Otherwise, when i have had both open, it did empty one tank in the course of a day (maybe 100 gal) and then the engine died

Evidently, using these returns was the way the previous owners transferred fuel. One of my goals when i added the Fuel Polisher system was to be able to transfer fuel quickly.
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