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Message started by h20skier on 03/01/10 at 07:57:07

Title: Fuel air mixture
Post by h20skier on 03/01/10 at 07:57:07

I made a mistake adjusting my idle speed with the fuel air mixture screw. Does anyone know how to set it to the correct mixture. I have been told by a couple of mechanics that they do it by sound.

Title: Re: Fuel air mixture
Post by Serowbot on 03/01/10 at 08:04:59

Without an exhaust analyzer, your ears are the tool... turn in 'till the idle drops,.. turn out 'ill the engine either lugs or stops increasing,... then set it in between...
If that don't work for you, just set it 1 1/2 turns out from closed and see how it runs...

Title: Re: Fuel air mixture
Post by h20skier on 03/01/10 at 08:09:40

Thanks

Title: Re: Fuel air mixture
Post by h20skier on 03/01/10 at 08:12:18

Serowbot is it closed when the screw is almost all the way out?

Title: Re: Fuel air mixture
Post by Serowbot on 03/01/10 at 08:23:36

Closed is in, clockwise... leanest setting,......

Out gets richer...counter clockwise...

;)

Title: Re: Fuel air mixture
Post by h20skier on 03/01/10 at 08:31:48

Thanks the 1 1/2 turns from closed was suggested by someone else too. I think I will try that first.

Title: Re: Fuel air mixture
Post by justin_o_guy2 on 03/01/10 at 11:47:52

close that with a gentle hand. That thing is a tiny little needle on the end & will "booger up" with very little effort.

Title: Re: Fuel air mixture
Post by Routy on 03/01/10 at 16:05:54

From the horror stories I've read about that air screw, I can't believe I was lucky enough to not have to touch it,.....fact is, I've never seen it, ....and don't want to ! :) But I feel for those that have had problems w/ it.

Title: Re: Fuel air mixture
Post by verslagen1 on 03/01/10 at 16:16:58

Not really a problem to be feared of.
But if you're a klutz, leave it be.

Title: Re: Fuel air mixture
Post by Routy on 03/01/10 at 16:23:14

I think a better idea is,...if it don't need adjusting, don't adjust it. Don't try to correct anything much above a fast idle by turning a screw that is not going to have much if any effect on it.

Title: Re: Fuel air mixture
Post by h20skier on 03/01/10 at 16:35:57

Justin, I already tightened it down pretty good, backed off 1 1/2 turns and it seems to be running well. I guess if I "boogered" the end it probably wouldn't run very well? Wish I had seen your post earlier.

Title: Re: Fuel air mixture
Post by h20skier on 03/01/10 at 16:36:31

Thanks for everyone's help.

Title: Re: Fuel air mixture
Post by justin_o_guy2 on 03/02/10 at 17:05:40

I guess you got away with it. I wouldnt make a habit out of it...

Title: Re: Fuel air mixture
Post by h20skier on 03/03/10 at 11:00:29

I am not touching it again.

Title: Re: Fuel air mixture
Post by thumperclone on 03/03/10 at 13:39:10

theres an old post in the tech section lancers i think "simple carb tuning"
or "carb tuning 101"