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Re: SU Carbs

To: Michael Ferguson <fergie@ntplx.net>, TR List <triumphs@autox.team.net> charset=ISO-8859-1
Subject: Re: SU Carbs
From: Dave Massey <105671.471@compuserve.com>
Date: Sun, 20 Jun 1999 11:21:11 -0400
Michael Ferguson Writes:

>TR3 was running VERY rich. Tried adjusting jet adjusting screw, but jet 
>collar was turning with it. Turned out the locking nut was loose. Removed
>carbs from engine, re-centered, tightened locking nut, reassembled and
>installed. Pistons move freely.
>
>Opened both jets by 15 flats, set throttle stop per instructions in every
>manual I own (barely holds a piece of paper). Started engine, let it warm
>up...and CANNOT make it run properly!! I get black exhaust and a VERY
rough
>idle at about 1000-1200RPM - any lower and it stalls. Black exhaust says
too
>rich so closed jets one flat at a time. No improvement, still black
exhaust,
>rough running. Kept tightening jet until all the way in! NO CHANGE.
>
>No matter where I have things set, lifting piston by 1/32" increases idle
>slightly. And the thing STILL runs like a tank.
>
>Am I doing something wrong or are my carbs in need of major surgery?
Thanks
>for your help.

Michael, 

Almost sounds like thge float level is too high.  Did you just rebuild the 
carbs?  If so the float valve replacement may require resetting the float 
level.  Or some dirt is holding one of them open.

Dave Massey
57 TR3 (with SU's)
71 TR6 (with ZS's)
80 TR8 (also with ZS's)


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