Brian wrote,
>Just got my new Weber from SS, and a manifold to replace my Strombergs that
>wouldn't keep an idle after my engine fire. Any tips on
>installing/adjusting??? I'm not even sure which is idle adjustment and
>which is fuel mixture
The idle speed screw connects with the throttle linkage.
The idle mixture screw is at the bottom of the carb under the primary
throttle.
The secondary also has a throttle stop, but this is not easy to get at,
as should have been set at the factory (dont mess with it).
Just to be certain the idle mixture screw is set right (more or less),
screw it all the way clockwise (gently) until it bottoms out on its seat.
DO NOT USE ANY FORCE!
Count the exact number of turns it takes.
It should be 1.5 turs.
Now screw it back out (anti-clockwise) 2.5 turns.
We start it out on the rich side to make sure we can keep the engine
running while we fine tune it. Engines will forgive a rich mixure
when they are cold, but not a lean one.
It ought to run out of the box, after you get it started, disengage to
choke, let the engine warm up, adjust your idle speed, then adjust
the idle mixture screw in or out to get a smooth idle.
Screw the idle mixture screw in (clockwise) until the engine just begins
to run rough, then screw the idle mixture screw out until it smooths back
out.
Once a smooth idle is found (at the proper RPM), turn the screw
1/4 turn anticlockwise to be certain you are running just a tad rich.
If you live in a warm area, you can probably skip the following step.
DGxV carbs usually come with the choke plate and choke unloader preadjusted
at the factory, but the choke throttle setting will need to be set on the
actual application.
The next morning (with the engine cold), be certain that the carb is
fully choked. Adjust the choke throttle stop so that the engine
runs at about 2000 to 2500 RPM with the choke throttle stop cam at its
highest (most choked) postition. This will insure that the engine should
start and stay running on a very cold morning.
Hope this helps.
Jarrid Gross
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