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Old 29 October 2013, 10:48   #1
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Diesel fuel line Question

Yanmar 6LPA

I am installing new FWS filters and fuel lines.

Am wondering why the fuel shut off valve is located on the return line, not supply line on
the current set up..
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Old 29 October 2013, 12:30   #2
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Nice looking interceptor.

First of all congratulations. That is a top notch filter setup. Did you get it from sbmar? Are you installing a vacuum gauge on it as well? Only need 1 but it is great for seeing restriction instantly.

Shutoff valves should be installed on both return and supply lines.

Did you buy the priming bulb setup for those filters as well? I would highly recommend it. Makes changing the filters and priming the engine a breeze.

sbmar.com has all the fitting in a prepackaged kit with high quality valves so you can switch between running and priming flows.
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Old 29 October 2013, 13:18   #3
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Quote:
Originally Posted by clloyd View Post
Nice looking interceptor.

First of all congratulations. That is a top notch filter setup. Did you get it from sbmar? Are you installing a vacuum gauge on it as well? Only need 1 but it is great for seeing restriction instantly.

Shutoff valves should be installed on both return and supply lines.

Did you buy the priming bulb setup for those filters as well? I would highly recommend it. Makes changing the filters and priming the engine a breeze.

sbmar.com has all the fitting in a prepackaged kit with high quality valves so you can switch between running and priming flows.
Yes from sbmar

Yes priming bulb set up.

If you look close you can see vacuum gauge in first photo.

I understand shut off valve in supply line, what is the purpose of the shut off valve in the return line. So I need 2 shut off valves?
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Old 29 October 2013, 13:24   #4
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The injection pump will leak out diesel when you change the filters - and you don't want air in that pump. It can leak out both the supply or the return. So shut off valves on both supply and return totally isolate the injection pump and keep air out of it - making filter changes much easier with less priming and faffing around.
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Old 29 October 2013, 13:29   #5
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-- edit -- capt n jack beat me to it
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Old 29 October 2013, 13:54   #6
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Thanks for the info, appreciate your responses.

I need to get this project done, its getting cold up here and I need to get this boat winterized.
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Old 29 October 2013, 13:58   #7
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Do you have a block heater or a wolverine pad on the oil pan you can plug in? It's a nice option. I remember having my fuel system off and being in the same position.

Another benefit to a little bit of heat on the engine is keeps everything dry all winter, less problems later.
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Old 29 October 2013, 14:41   #8
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Originally Posted by clloyd View Post
Do you have a block heater or a wolverine pad on the oil pan you can plug in? It's a nice option. I remember having my fuel system off and being in the same position.

Another benefit to a little bit of heat on the engine is keeps everything dry all winter, less problems later.
Have a block heater on my F350 6.0 only way it will start below 0.

No heater on yanmar ,sounds like a good idea.
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