Carb. Question

tenn red

On 94 DS 290 motor, when you turn screw in on fuel mixture , does that decrease gas mixture ? What I am wondering which way makes the gas richer .

BGW

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lockman1

I've been confused about that for years until... well?... just now!

Technically, it's an "idle circuit", (for a smooth idle)
Being that pedal start carts don't really ever idle...
(and it stops being used the second the throttle plate opens...)
a general setting of 1-1/2 to 2 turns out would be a nominal setting.

on 4 stroke engines, it's considered a "Fuel" screw,
so, yes... turning the screw IN decreases the amount of fuel, (lean)
and turning the screw OUT increases the amount of fuel. (rich)

Here's a pretty good article that explains it.
(granted, it pertains to a motorcycles, BUT... it's the same idea!)

http://www.chronicmx.com/chronic-mx-...oke-dirt-bike/

Hope this helps!

cruisinkruty

good article on adjustable carbs....thanks