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jmonte35
MMT Pro Member
Joined: Thu Jul 09, 2015 2:36 pm Posts: 73 Location: Scott AFB, IL
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 Fuel filter never full
I have an HDR BD 44. Not sure if I have a problem or not. The fuel filter never stays full. It is basically always 1/2 to 3/4 full even when running full throttle. It's always been that way and doesn't seem to affect operation but it's got me stumped. Only thing I can think of is air is getting in some where. I've inspected the lines and all looks well to me. Is this even something to be worried about or is it somewhat normal.
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| Wed Aug 31, 2016 10:46 am |
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BERNIE255
MMT 1000 Club
Joined: Sun Jun 16, 2013 4:43 pm Posts: 1381 Location: Avoyelles Parish/ Marksville LA
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 Re: Fuel filter never full
If it runs fine then whats the problem?
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| Wed Aug 31, 2016 10:54 am |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm Posts: 16915 Location: Rowlett, TX
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 Re: Fuel filter never full
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| Wed Aug 31, 2016 11:10 am |
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jmonte35
MMT Pro Member
Joined: Thu Jul 09, 2015 2:36 pm Posts: 73 Location: Scott AFB, IL
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 Re: Fuel filter never full
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| Wed Aug 31, 2016 11:49 am |
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MaXXis85
MMT Elite Member
Joined: Wed Jan 14, 2009 7:23 am Posts: 6233 Location: Tarkington, TX
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 Re: Fuel filter never full
That is pretty normal as the fuel is getting sucked through the filter, not pushed.
_________________ Bayou Surface Drive 337-351-0362 Tarkington, TX 77327
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| Wed Aug 31, 2016 12:05 pm |
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270Handiman
MMT 1000 Club
Joined: Thu Dec 29, 2011 10:46 pm Posts: 2342 Location: Mandeville, LA
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 Re: Fuel filter never full
^x2. Completely normal
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| Wed Aug 31, 2016 2:35 pm |
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richard nagon
MMT Addict
Joined: Wed Apr 20, 2011 5:35 pm Posts: 537
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 Re: Fuel filter never full
What you have is a low pressure pump. Supplying a low fuel demand engine. The filter housing is serving as a air bubble. You have such a low psi demand that the air bubble can't be pushed thru. If your tank was above engine air bubble would be gone. The only thing that will happen is your filter will plug sooner since you are only using a portion of its media. If you have a e pump you could take hose off at carb and run fuel pump and air might be pushed thru. But it will come right back. You are not hurting your engine so run it.
_________________ JUST ANOTHER FARMER ON WELFARE
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| Wed Aug 31, 2016 6:32 pm |
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mudxxed
MMT 1000 Club
Joined: Thu Sep 05, 2013 4:46 pm Posts: 1398 Location: SE Bama
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 Re: Fuel filter never full
100% normal
_________________ 1651 Excel/ 35 MB HD: little of dis, little of dat
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| Wed Aug 31, 2016 7:25 pm |
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dead animal
MMT 1000 Club
Joined: Fri Jan 16, 2009 3:18 pm Posts: 1726
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 Re: Fuel filter never full
just get some duck tape and tape over the empty part of your filter so it always looks full. lol
i'd be more concerned if it stayed full. but then again, if it were running good i'd never look at the filter either way. lol
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| Wed Aug 31, 2016 9:34 pm |
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MaXXis85
MMT Elite Member
Joined: Wed Jan 14, 2009 7:23 am Posts: 6233 Location: Tarkington, TX
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 Re: Fuel filter never full
Those filters are more of a screen anyways. They are 30 micron ish rated... They really only catch hunks of debris and not really "filter" the fuel.
_________________ Bayou Surface Drive 337-351-0362 Tarkington, TX 77327
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| Thu Sep 01, 2016 6:32 am |
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Skintback601
MMT Member
Joined: Fri Aug 22, 2014 1:12 pm Posts: 5
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 Re: Fuel filter never full
All of them do it that I've seen
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| Sat Sep 03, 2016 11:08 am |
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