I'm in the middle of my carb rebuild and i need some help... when i took apart the floats didn't notice which way the screen in the first pic came out.


the second pic is where the needle/valve assembly fits in. i'm pretty sure the filter screen drops down in w/ the closed end downward (when the airhorn is inverted). i'd really appreciate it if anyone could confirm this for me. Thanks!

 

Well, I'm no guru, but I'm mostly through a rebuild myself. I ran into a similar problem, and asked Sterling about the filter screen. He said he leaves them out of his Sterling carb because they cause fuel restriction at/over 9000rpm. His opinion was that it was unnecessary redundant filtration, so I ditched mine.

This doesn't really answer your question--I didn't notice the orientation of my filter screens--but at least gives ya a bump =).

 

Yeah, just leave them out. When I had them in, the fuel wasn't getting through right.

 

Here's a third to the 'ditch 'em' crowd. Mine were horribly gummed up when I dissembled my carb, and they didn't clean up very well.

 

If you want to put it in, it supposed to fit right on top of the needle-seat. There's a little lip/shelf on the top of the needle seat. The screen is supposed to stay firmly on that and then you screw it in.
The old screens are simple metal cylinders and are difficult to get to sit well. In 82 (I think) they went to a much nicer, higher-flow conical plastic one that really fits on the top well.

 

Thank you! thats the way i thought it'd go, but if i can leave them out i'm gonna. this is good because they're easy to lose (which i had done, but finally found it, guess i spent 30 minutes for nothing). thanks again for all the prompt help.

 

Sterling, I don't think you can ever seperate the word 'guru' from someone who's smart with carbs. You're screwed, pal.

 

My screen fell completely apart when I went to put it back in -_-

 

There are also two screens in the banjo fittings on each fuel bowl pipe feeder, as well. They're not nearly as fine messh as the tiny screens, but still pretty delicate. They get mangled no matter how careful you are, but can usually be reshaped by putting it on a pen and rolling it on the table to take out the crinkles.

Usually with a simple rebuild you don't need to open them. But if it's a junkyard carb that's been exposed to rain, those screens (brass) do get corroded and blocked with copper oxide dust.