[AT] Leaking fuel fitting

Tom tmartin at xtra.co.nz
Sat Jan 19 10:39:36 PST 2013


In my experience, any filter that required pressure to cause fuel to flow through, was ready for the bin. 
As for downdraft carburetors, the fuel pump is a lift pump rather than a pressure pump, there only to fill the carburetor bowl.
On the subject of copper fuel lines, I've never seen them as original fitments only as the result shadetree mechanical repair...

Tom

--- On Sun, 20/1/13, charlie hill <charliehill at embarqmail.com> wrote:

From: charlie hill <charliehill at embarqmail.com>
Subject: Re: [AT] Leaking fuel fitting
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Date: Sunday, 20, January, 2013, 5:01 AM

Larry think about it.  If you have a fuel pump pushing the fuel under 
pressure the pump will force the fuel through the filter.
If it is a gravity flow system the filter CAN, if it's too small, restrict 
the flow enough to affect the engine performance.
Updraft carbs on tractors are gravity flow systems.  Down draft carbs on 
your cars or trucks have a fuel pump.
There may be cases where this is not true but it is in all applications I'm 
familiar with.

Charlie

-----Original Message----- 
From: Larry Goss
Sent: Saturday, January 19, 2013 10:39 AM
To: Antique tractor email discussion group
Subject: Re: [AT] Leaking fuel fitting

Am I missing something here?  How does the style of carburetor affect the 
force of gravity between the gas tank and the engine?

When I was employed in small engine repair, we had to pay attention to the 
style of fuel filter we installed, but the only criteria was whether or not 
the product had a fuel pump.  I presume the difference is based on the 
micron size of the filter element, but I have never bothered to check the 
specs on the various ones to see if that really is the difference.

Larry


----- Original Message -----
From: charlie hill <charliehill at embarqmail.com>
To: Antique tractor email discussion group <at at lists.antique-tractor.com>
Sent: Sat, 19 Jan 2013 02:14:40 -0500 (EST)
Subject: Re: [AT] Leaking fuel fitting

I know what Roy is talking about.  There are some inline filters that are
designed for pressurized lines and they will not always gravity flow
enough fuel for an up draft carb but there are plenty out there that will.

Charlie

-----Original Message----- 
From: jtchall at nc.rr.com
Sent: Friday, January 18, 2013 10:54 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Leaking fuel fitting

Roy, we've added a lot of in line fuel filters to tractors and lawnmowers
with no problems. None of them were automotive filters (that I am aware of)..
Napa keeps a good selection of them. I have one tractor that has a sediment
bowl type filter with a replaceable filter. It looks better on a restored
tractor than a plastic in line filter. With that one you don't have to
convert to rubber lines. To the untrained eye it looks like it belongs on
the tractor.

John Hall


-----Original Message----- 
From: Roy Morgan
Sent: Friday, January 18, 2013 5:50 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Leaking fuel fitting


On Jan 18, 2013, at 9:05 AM, Cecil R Bearden wrote:

> ... The b est thing that
> ever happen ed years ago was when they came out with those in line
> fuel
> filters.  They stopped the vibration and filtered much better

Do I remember right that normal car fuel filters have too much
restriction, and we should look for the right kind to put on gravity
fed fuel systems?  The '51 IHC W-4 here, for instance?

Roy

Roy Morgan
k1lky at earthlink.net
K1LKY Since 1958 - Keep 'em Glowing!



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