1969 Triumph HeraldFACTORY OEM SERVICE PROCEDURE

Marelli Distributor Advance Specifications

NOTE: FOR ENGINE RPM & DEGREES, MULTIPLY SPECIFICATIONS BELOW BY 2.
MARELLI DISTRIBUTOR ADVANCE SPECIFICATIONS

Distributor Number Centrifugal Advance (Dist. Degrees & RPM)(1)
Deg. RPM Deg. RPM Deg. RPM Deg. RPM
S93A 4-6 400 9 1/2-11 1/2 750 16-18 1750 22-24 2500
S94A 4-7 400 9 1/2 11 1/2 750 16-19 1750 22-25 2500
S98A Begin 775 2 1/2 1000 7 1/2 1500 13 1/2 1900
S103A Begin 375 8 1/2-9 1/2 750 11 1/2 13 1/2 1500 17-19 2500
S110B 5 1/2 500 11 1/2 1000 15 1/2 1500 19 1/2 2100
S110C 5 500 10 1/2 750 14 1/2 1500 17 1/2 2050
S112BX 7 1/2-9 1/2 1000 12-14 2000 14-16 2500 17 1/2 3000
S118A & AA Begin 450 5 1/2 750 .......... ..... 14 2350
S119A 1 1/2-5 1/2 400 6 1/2-10 1/2 750 11-13 1500 13 1/2-15 1/2 2500
S124A 5 500 9 1000 13 1500 15 1800
S124B 5 500 10 1000 13 1/2 1500 17 2150
(1) If equipped with vacuum advance unit, advance range will be between 10-16°.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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