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Old 18-10-2006, 23:35   #1
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CAV fuel filter

Hi ,
I changed the primary (not the one attached to the motor) fuel filter today. You have to be a houdini to get to it. I want to move it to where I can keep an eye on it.
It will be a bit higher than where it used to be. Used to be under he level of the bottom of the fuel tank.
Does this height matter or does the pump in the motor overcome this?
cheers
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Old 19-10-2006, 00:04   #2
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Once the fuel line is filled and bled, it really doesnt matter where the filter is located.
Having the filter set above the bottom of the tank will require some means of pumping the oil through the filter set when you need to bleed air from it; a 12 vdc pump mounted near the tank is probably best for such air bleeding purposes.
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Old 19-10-2006, 00:19   #3
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cheers,
it will still be at the middle of the tank in height so will bleed from gravity.
Thanks
Darryl
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Old 19-10-2006, 02:50   #4
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Providing you never have the misfortune of having to bleed when the fuel level is below the filter level. That will prove problematic. And chances are, when you HAVE to bleed, it won't be at a conveniant level of above the filter. So if I was you, I would try and get it as low as you can.
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Old 19-10-2006, 04:09   #5
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Racor makes a filter unit that has the water collector on the bottom and a small hand pump on the top of it so you can pull fuel into the filter. The stroke is about 3 inches. I have that on our second boat. That racor has the inlet about level with the top of the tank. It's in a place where it can't be any lower or higher. Some times you can't get a choice.

Our first boat has a Y valve unit for switching between fuel tanks and it also has a built in DC fuel pump you can turn on manually. The unit is located under a hatch in the galley sole below the bottom of either tank. That pump can then bleed the system. It's most handy when you have more than one tank. You can still get an air lock but the self priming pump can handle it in every situation I've run across.
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Old 19-10-2006, 12:03   #6
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Only problem is Paul, if Darryl can't get a CAV filter any lower, he won't have any room at all for the Racor. IT is a very long bodied unit. In saying that though, there are several other filters out there with the priming pumps fitted too.
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Old 19-10-2006, 17:54   #7
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Seafox;

My primary filter (the one not attached to the engine) is about two feet above the fuel tank ... in fact it is the highest point on the fuel system. I installed a "squeeze bulb", like the kind usually seen on outboard motor rigs, to help get air-bubble free fuel up to the fuel filter when I change elements.

Worked for me.
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Old 19-10-2006, 23:25   #8
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Quote:
Originally Posted by Pblais
Our first boat has a Y valve unit for switching between fuel tanks and it also has a built in DC fuel pump you can turn on manually.
Ours too!!!
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Old 21-10-2006, 02:39   #9
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I have installed it in a really easy to get to place. cleaned it and reassembled. bled the system and she started first pop.

Thanks for the replys eveyone.
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