yes it does, You will see a little tube about 1/4 inch long sticking into
the venturi of the primary. It is held in place by a screw located between
the primary and secondary venturis. You can actually see it squirt gas when
you push in the accelerator. Failure to do so may be caused by a bad pump
which may be located by following the linkage around to a lever which
actuates the pump. It is located on the float bowl part of the carb, a
little square box with a plate covering it held on with 4 screws. The lever
is in the midle of the plate. Inside there is a diaphram and spring assembly
which can go bad and is relatively easy to replace. You could also have a
clog somewhere in the casting or in the accelerator jet. All of which can be
cleaned out with carb cleaner. One warning, wear protective eye gear when
cleaning a carb. You'd be surprised to find that some of those cast chanels
end up pointing at your eye. There is a book, Weber Carburators by Pat
Braden that is really good ~$14.
Chris Reichle
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From: mgs-owner
To: mgs
Subject: Weber carbs
Date: Saturday, September 13, 1997 1:46PM
Does the Weber downdraft carb have an "accelerator" or "primer" pump
(like an old Holley) so that when you step on it hard it squirts some
raw gas into the engine??
If so, how can I check it out?
Is so, and if bad, how can I repair it?
TIA
Dwade
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