[Spridgets] SU help needed

Pete Chast pchast at francomm.com
Fri Jun 24 20:40:58 MDT 2011

Hmm. You have an unknown situation I'd proceed as follows....

You have the top of the chamber off and it will not move OR you have the  
piston out and can not separate the chamber?
Have you removed the bottom jet chamber.. I don't remember what to call it.

first possibility:
Clearances are tight. things must be square and parallel. In either case  
get some really light oil like a penetrant and saturate
things. Let it sit for a day. Using a - really light- plastic mallet tap  
the sides and top of the case. If it was slightly separated
tap it back together. More oil. try to turn things by hand - no pliers...  
Fiddle some more. eventually it will separate.

Second possibility is gummed up gas. get Seafoam and drown the carb in it  
after draining the oil for an hour. let sit for several
hours. try to turn by hand. slosh it around and drain. new Seafoam.   

On Fri, 24 Jun 2011 21:25:46 -0400, J Foster <tr3.4.me at gmail.com> wrote:

> I've got a pair of SU's for my 73 Midget that I'm hoping to rebuild.
> I'm not the least bit familiar with SU carbs other than having browsed
> several guides found online about the operation and maintenance of
> them.
> I've begun cleaning / disassembling the carbs but the pistons are
> stuck in the suction chambers. I've also attempted to unscrew and
> remove the piston dampers from the top of the chambers and, while the
> knob on top will unscrew, the damper will not come out the top either
> (it should; shouldn't it?).
> I've tried soaking one of them in a parts cleaner for several days now
> with no apparent progress. Any suggestions / recommendations on how
> to get these apart?
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