: Which way does fuel filter go?

20-02-2006, 02:28 PM
Gidday all,

I just received my stone cartridge fuel filter.

Silly question.............but which way does the fuel flow through from the tank, or doesn't it matter?

It is similar to this:

The stone cartridge is attached to a brass disc with a centre hole. This is inserted into one half of the filter housing and is pushed up against an internal o'ring by a spring which sits against thebottom of the stone filter basket and the other end of the filter housing.

I'm assuming fuel flows into the stone basket from the brass disc end (ie non spring end) and onwards to the carby via the spring end.

Correct?...........or doesn't matter?

(My old filters havebeen the basic mesh type which were easy to work out.)


SteveEdited by: stevo1957

20-02-2006, 02:58 PM
"I'm assuming fuel flows into the stone basket from the brass disc end (ie non spring end) and onwards to the carby via the spring end"

yup id say your right

20-02-2006, 04:28 PM
as long as the fuel passes through the filter, its all good http://www.ausrc.com/forum/smileys/smiley1.gif

unless theres some kind of check valve there.

20-02-2006, 05:18 PM
make sure you scratch an arrow on it. that way if you have things apart formaintenanceyou dont accidentally hook it up backwards and flush all the crud into your engine. http://www.ausrc.com/forum/smileys/smiley3.gif

22-02-2006, 04:11 AM
Mmmmm unless I'm reading it wrong I'd say to install it the other way.

My take on filters is that the best way to run them is so that the fuel
passes from the tank... through the OUTSIDE of the filter.... to the
inside bore of the filter.... then to the carby.

You want to be able to clean a filter and this is best done by blowing
air or some cleaning fluid through them. If you have rund the
fuel from inside the filter to outside then they must be cleaned with
the filter assembled otherwise you can't pass the fluid/air through
them. But if you have rund the fuel for outside the filter to
inside then you can clean them by just holding the element and pushing
air into the filter bore.

A filter will work regardless of which way you run the fuel through it,
so the best thing is to run the fuel so that the filter is easy to

22-02-2006, 04:21 AM

You must be a psychic! http://www.ausrc.com/forum/smileys/smiley2.gif

I was just about to put a post up.

Whilst putting out the recycling staff last night, I found the small card that the filter was packaged in...........and voila...........a picture with an arrow showing fuel flow direction! (didn't see it when I ripped open the packaging.)

You are 100% correct - fuel flow from the tank comes via the "spring" end, through the stone canister from the outside, then down to the carb.