Thanks Joe and Bill for the tips. Yeah, I think there is some dirt in
there. The needle taper is fine. I did a mini-cleaning but I just
popped off the top of the carb and didn't take it completely apart. I
will do that and install a new kit in it. The car sat for many years
and the gas had turned to varnish. I cleaned the tank and fuel lines
out. I cleaned out the carb but probably not good enough. thanks much,
Nick.
On Tuesday, August 21, 2007, at 08:29 AM, JLSAVARD@xxxxxxx wrote:
In a message dated 8/21/2007 10:56:18 A.M. Eastern Daylight Time,
nick.barb@xxxxxxxxxxxxx writes:
I know this is a bit off topic but it is a Mopar, a 1939 Plymouth.
It
has a Carter B and B carb with a manual choke. The car has a rough
engine idle but very smooth when accelerating. When I try to adjust
the idle mixture nothing really happens. After the car has warmed up
if I pull the choke out slightly, the car idles beautifully. Any
thoughts greatly appreciated. thanks, Nick Nichols
Nick,
The first thing I would do is to remove the idle adjusting screw and
see if the tapered end is still a taper. Sometimes over time people
trying to adjust the idle close the needle (soft brass) so tightly
into the seat (harder cast Iron) that the taper is deformed and won't
adjust.
Beyond that, the B&B single is a very simple carburetor to clean.
(Assuming that it is the same or similar to the ones from the
1950's.) You may have some crud in one of the air bleeds or > something.
Joe Savard
Lake Orion, Michigan
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