You can squirt a bit of carb cleaner on the throttle shaft bearings and see if
the idle changes which will help diagnose worn shaft bearings.
Also check for contamination within the idle jets and at the bottom of the fuel
bowl as minute stuff will get by the carb's. mesh filter and clog the idle
jet's tiny ports far more so than the larger ports of emulsion
tubes and main/air corrector jets.
Really minute stuff such as corrosion from the fuel tank/system will also get
by even the best of fuel filters but you'll see this
(brown 'sludge') at the bottom of the fuel bowl if this is the case, though
this minute stuff normally begins clogging the tiny progression holes as well
eventually leading of off-idle roughness on initial gently acceleration as well
as uneven or
less than stable idle.
Cap'n. Bob '60 :{)
-----Original Message-----
From: WeslakeMonza1330@aol.com
Sent: Tuesday, September 22, 2009 4:18 AM
To: derbydave@cox.net, spridgets@autox.team.net
Subject: Re: [Spridgets] Weber Help
It must be a really old and well used carb for that to happen. A good
weber specialist ought to be able to do this for you. There is a book about
Webers _www.veloce.co.uk_ (http://www.veloce.co.uk) that shows how to do
this for yourself.
Regards
Weslake-Monza 1330
In a message dated 22/09/2009 02:19:59 GMT Daylight Time, derbydave@cox.net
writes:
Running a 1275cc with a DCOE 45 13 Weber (made in Italy) Dual Sidedraft
Brevettato in 59 bugeye and have suffered all summer with erratic idle
speed
and inconsistent return to stable idle.
My winter project is to correct this problem.
It looks like the ball bearings in the throttle shaft need to be replaced.
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