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HIF SU mixture screw

Started by BillPaul, June 19, 2022, 11:32:05 AM

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Thank you John Twist for great YouTube segment on tuning SU's.   My '73 GT had not run in 30+ years.  The car now runs but very rough. I used the YouTube segment but the rear unit would not enrich. I pulled the unit back off and discovered the screw frozen in the body full clock wise. It's been soaking in liquid wrench but dare I try to use the heat method. Great stuff on YouTube. Thanks in advance
Bill Paul
Original owner.


You should contact John Twist directly at:

John H Twist
University Motors Online
100 East Beltline Avenue SE
Grand Rapids MI 49506-2410
Cell  616 307 6737
American MGB Association
phone/text: 773-769-7084

North America's oldest and largest club for all MGBs, MGB-GTs & Midgets.  A nonprofit organization founded in 1975 and offers color magazines, emagazines, technical advice, member recommendations on service shops, registration of your MG, a tradition of service & FREE member classified ads that appear in the magazine & on the website.

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