Why don't fuel filters stop all rust

[ACUDANUT]

Have a wix fuel filter, but rust is still entering my carb. WTH 

[polywideblock]

so it was a clogged filter in the carb then 

         don't know how its getting past filter , unless its dissolved in the fuel somehow 

[green69rt]

Just a couple of thoughts...  Where is the rust showing up?  In the float bowls?   Are you sure its rust and not just some red colored deposit from the gas??  Sometimes gasoline distributors add color to the gas so they can distinguish one mix from another.

[MoParJW]

The rust particles just keep breaking down until they are small enough to pass through the filter, unfortunately.

[ACUDANUT]

Poly, I have not looked at the carb yet.  It's been too cold and rainy lately.  I like a sunny warm day to open the barn up and play.  I'll let you know what I find.
A Better mechanic friend of mine tells me no filter stops all rust getting to the carb.  So I am stumped on that thought.

[c00nhunterjoe]

If you are fighting that amount of rust, then i would be replacing the tank and lines.

[ACUDANUT]

Yea, I know it's new tank time. I'm just waiting until the car is painted.

[BSB67]

It is either a bad filter or the particle size.

[matrout76]

might not be rust...

could be varnished gas that has deposited on the inside walls of the fuel line and is now being "cleaned" off by the new gas.

I bought a kids 90cc four wheeler that had sit for a couple years.  Got it running and the kids rode it for a day.  went to start it the next time, and it didn't have any power.  pulled the carb apart and there was a bunch of brown flakes in the float bowl and clogging the jets. 

After doing this the second time, i replaced the old fuel lines.  I cut one open, turned it inside out, and brown flakes peeled off the inside of the hose.  Finally, after cleaning the carb 4 or 5 times, i think all of the gunk is out of the fuel system.

[dstryr]

I replaced the tank in my RR in 2003 because the center carb would fill with super fine sediment every few tanks of gas.  I also sprayed most of a can of carb cleaner through the lines and then blew out with compressed air and haven't had trouble since.  The fine rust is like baby powder and I think it goes right through the filter.

[ACUDANUT]

Great info, Thanks. 

[ACUDANUT]

Found my problem.  The old gas has turned into/like a varnish (it stinks bad).  It has clogged the carb with crap. Now I need to clean both bowls and get new gaskets.
Can you think of anything else I should do ?

[matrout76]

if you are seeing it in the carb, its probably in the whole system...which is what i fought with my kids 4-wheeler.

might be worth pulling the fuel lines off at the tank and back-flushing them with something like Berrymans B12 Chemtool which is my go-to carb cleaner.

Or, is there a better fuel filter to put at the carb and just plan on replacing it often?

[ACUDANUT]

Ok, Both bowls are filling now, but it is not squirting fuel ?