[Mgs] Importance of 3 screws in float chamber lid

[Simon Matthews]

Don,

I just looked through the various Haynes manuals and saw that the float
chambers are different. I guess I will buy a reverse drill bit and try to
remove the remains of the screw.

Meanwhile, would anyone like to hazard some guesses as to what could cause
the problem that I wanted to fix: over-revving at idle when hot (revs at
about 3000 rpm when hot, but is around 1000 rpm when cold).

Simon

On Fri, Nov 23, 2012 at 7:58 PM, Don <don at napanet.net> wrote:

> Simon,
> the float bowls are a different design on MGAs.  Try posting on the MG
> Experience that you are looking for a float bowl for HS4 carb and I bet you
> can get one inexpensively and quickly.  I would try removing the remains of
> the screw on yours before taking it apart; can't hurt it really.  I think
> these carbs can function ok with two screws, but better to have three.
> Don Scott
>
>
>
>
>
> At 07:07 PM 11/23/2012, Simon Matthews wrote:
>
>> Are the float chambers the same size on carbs off an '57 MGA (this is a
>> '71
>> MGB)? I have a spare set of carbs for an MGA in my garage. I could use the
>> float chamber from that if necessary.
>>
>> Simon
>>
>> On Fri, Nov 23, 2012 at 3:46 PM, gordies garage <mg_garage at comcast.net
>> >wrote:
>>
>> > I think I'd spend a little time trying to remove the remains of the
>> screw,
>> > but would plan on replacing the float bowl if removal caused any damage
>> at
>> > all to the pot metal of the bowl.  Used carbs and parts are fairly cheap
>> > and it would be straight forward to replace the float bowl and you would
>> > know you have the proper 3 screws.
>> >
>> > Good luck.
>> > Gordie '62 MGA
>> >
>> > ------------------------------****--------------------
>>
>> > From: "Simon Matthews" <simon.d.matthews at gmail.com>
>> > Sent: Friday, November 23, 2012 5:59 PM
>> > To: "MGS" <mgs at autox.team.net>
>> > Subject: [Mgs] Importance of 3 screws in float chamber lid
>> >
>> >  On starting to look at over-revving issues, I noticed that one of the
>> >> float
>> >> chambers has 2 screws in the lid. On removal, the reason becomes
>> obvious:
>> >> the remains of a screw stuck in the threads.
>> >>
>> >> So, my question is: how important is it to attempt to remove the shank
>> of
>> >> the screw and put in a new screw? If I mess up the removal, I might
>> damage
>> >> the float chamber, which then apparently means a new carburettor (Moss
>> >> doesn't show the float chamber as a separate item). So I am wondering
>> >> about
>> >> re-assembling with only 2 screws.
>> >>
>> >> Simon
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