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Re: Carb Question

To: William M Walters <billwalters2@juno.com>
Subject: Re: Carb Question
Date: Sat, 11 Mar 2000 15:22:55 -0800
Cc: spridgets@autox.team.net
References: <20000308.073217.-340411.0.billwalters2@juno.com>
Hi Bill

I would check for a blown diaphragm on the Dissy or a leaky vacuum tube.  Get
out the carb cleaner and give her a squirt with the engine running, if the
rpm's go up then you got a leak.  I had some bad ones on the charcoal
canister.  Had a carb that wouldn't adjust no mater what I did.

Rick

William M Walters wrote:

> I recently began helping (???) my nephew work on a '73 1275 engine.  It
> runs, but not very well. I have some experience with the SU carbs and
> equalizing them with a Unisyn.  My problem is that I can't seem to get
> the rear carb to have any vacuum unless the idle screw is cranked down to
> about 3500 rpm.  The front carb has good vacuum at all rpm's.
> I have run compression tests, and all cylinders are around 140-150
> pounds.  A vacuum gauge hooked to the intake manifold at the vacuum
> advance nipple shows good draw, but it bounces around a lot.  Are the two
> things connected?  The PO said he put a carb kit in so I'm a little
> concerned as to whether he might have done something wrong.
> Any help you can give will be appreciated.
> Bill
> Former Bugeye owner
> http://dl.www.juno.com/get/tagj.


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