Austin Healey Sprite – M. G. Midget IGNITION SYSTEM DETAILS

Austin Healey Sprite – M. G. Midget

IGNITION SYSTEM DETAILS

(information from SPRITE, MIDGET, 1958-71 AUTOBOOK, by Kenneth Ball, Autopress Ltd. 1971)

Spark plug type all capacities cxcept Sprite IV and Midget III Champion N5
Spark plug type (Sprite IV and Midget III) Champion N9Y
Spark plug gap 0.025
Contact breaker gap 0.014
Static setting, Premium fuel:  
  948 cc (high compression) Sprite I 5 deg. before TDC
  948 cc (high compression) Sprite II and Midget I 4 deg. before TDC
  1098 cc (high copression) Sprite III and Midget II 5 deg. before TDC
  1275 cc (high comression) Sprite IV and Midget III 7 deg. before TDC
  1275 cc (Sprite IV and Midget III) Exhaust emission control 4 deg. before TDC
Static setting (low compression):
  948 cc (Sprite II and Midget I) 1 deg. before TDC
  1098 cc (Sprite III and Midget II) 3 to 5 deg. before TDC
  1275 cc (Sprite IV and Midget III) 7 deg. before TDC
Stroboscope setting at 600 engine rev/min:
  1098 cc (Sprite III and Midget II) 8 deg. before TDC
  1275 cc (Sprite IV and Midget III) at 1200 rev/min 22 deg.
Stroboscope setting at 1000 engine rev/min:
  1275 cc (Sprite IV and Midget III) Exhaust emission control 10 deg. before TDC
Distributor type (lucas)
  Sprite I D.M.2-P.H.4
  948 cc Sprite II and Midget I D.M.2-P.4
  1098 cc and later 125 cc 25 D.4
  1275 cc (early – no vacuum control) 23 D.4
Coil type (Lucas):
  All models except Sprtie IV and Midget III L.A. 12
  Sprite IV and Midget III 11 C.12

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