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Another fuel system setup question - fuel / water filter before or after mech pump?

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Old 06-01-2015 | 02:26 PM
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Originally Posted by Budman II
Well crap, then why am I going through all the trouble to install that larger pickup and 1/2 inch hoses? Oh well, going to do it anyway just in case.
I never said it was the right way to do things. Believe me I pissed and moaned about they way it was setup. But at the end of the day it worked. I highly doubt if there was an electric pump on it would have ever worked. The point is those Holley pumps will pull some fuel out of the tank. Last year it was 762hp this year it's 884hp and he thinks the same pickup and fuel lines will do. I did however convince him to stup up to an FST fuel/water separator.
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Old 06-01-2015 | 02:33 PM
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Originally Posted by Black Baja
I never said it was the right way to do things. Believe me I pissed and moaned about they way it was setup. But at the end of the day it worked. I highly doubt if there was an electric pump on it would have ever worked. The point is those Holley pumps will pull some fuel out of the tank. Last year it was 762hp this year it's 884hp and he thinks the same pickup and fuel lines will do. I did however convince him to stup up to an FST fuel/water separator.
Just bustin' your chops, BB. Thought I'd dole it out some too.
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Old 06-02-2015 | 09:46 PM
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Originally Posted by Black Baja
I never said it was the right way to do things. Believe me I pissed and moaned about they way it was setup. But at the end of the day it worked. I highly doubt if there was an electric pump on it would have ever worked. The point is those Holley pumps will pull some fuel out of the tank. Last year it was 762hp this year it's 884hp and he thinks the same pickup and fuel lines will do. I did however convince him to stup up to an FST fuel/water separator.
with 762 hp and a stock filter head your buddy was playing with a gun with one bullet,with 884 hp that gun is fully loaded.it sounds like your buddy is a lucky gambler.
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Old 06-02-2015 | 10:22 PM
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From: bel air, md
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Originally Posted by mike tkach
with 762 hp and a stock filter head your buddy was playing with a gun with one bullet,with 884 hp that gun is fully loaded.it sounds like your buddy is a lucky gambler.
Boat rolled over 95mph last trip out last year. He and 1 other ejected boat landed upright. No lanyard kept running. Somehow cam back to an idle wheel turn all the way one direction boat spinning in a circle. Late in the day middle of the Bay no boats on the water. One made it back in and shut it down. Yeah, some people can do it all wrong and get away with it. Some can't.
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Old 06-02-2015 | 10:40 PM
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Originally Posted by FIXX
not...merc sucks fuel through the spin on fuel filter..carb models have a rock filter in the carberator also..(Qjet) i have also seen some efi with and with out in line fuel filters after the feed pump..
Those rock filters are a good idea in all carbs imo. Was rebuilding a pair of demons for a buddy this week, and found this in his needle/seat.
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Old 06-02-2015 | 10:40 PM
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I saw a two ilmar 700hp plumed wrong and feeding it each through one #4 fuel hose shook my head. Staid that way on one engine I fixed the other.
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Old 06-02-2015 | 10:48 PM
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MERCURY MARINE Water Separating Fuel Filter, 25 Micron, O/B and Mercruiser, Filter
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Old 06-02-2015 | 10:54 PM
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Old style canister filers, were 10 micron for EFI engines, 25 Micron for carb engines.
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Old 06-02-2015 | 10:57 PM
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Originally Posted by MILD THUNDER
Old style canister filers, were 10 micron for EFI engines, 25 Micron for carb engines.
EFI runs 2 filters?
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Old 06-02-2015 | 10:58 PM
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Originally Posted by 14 apache
EFI runs 2 filters?
Yes, most had the spin on filter, plus a filter before the injector rail if I recall right.
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