Subject: [Healeys] HS4 needles (tri-carbs)

From: Bob Haskell via Healeys <[email-masked]>
Date: Mon, 9 May 2022 22:34:30 -0400

I found an inconsistency in the BT7/BN7 parts lists for the carburetter 
needles fitted to the tri-carbs (HS4s).  The 4th and 5th editions have 
the standard/rich needles swapped.

Part Number
	AKD 1151 4th edition
	AKD 1151 5th edition
AUD1127
	Needle - standard (DJ)
	Needle - rich (DJ)
AUD1128
	Needle - rich (DK)
	Needle - standard (DK)
AUD1126
	Needle - lean (DH)
	Needle - lean (DH)

Other references that match the 4th edition:

  * Tuning S.U. Carburetters, by Speed Sport Motobooks - July 1970.
  * SU Carburetters, by Interauto, 1972.
  * Burlen's web catalog
    <https://sucarb.co.uk/carbspec/carburettor/essentials/id/395/>

Other references that match the 5th edition:

  * AKD 5036 issue 3, Carburetter Service Parts List, page SJ8

If the needle charts in the Speed Sport Motobooks and Interauto books 
are to be believed, then the info in the 4th edition is correct.

Cheers,

Bob Haskell
Austin Healey 3000 BN7/BT7 registrar

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