Briggs & Stratton World Formula 124435-8101-8106-01 Engine Tech Manual

Below you will find brief information for Engine World Formula 124435-8101-8106-01. This manual details the technical specifications and allowable modifications for the Briggs & Stratton World Formula engine used in Quarter Midget racing. It covers engine components, required and allowable modifications, technical procedures, and torque specifications. This ensures fair competition and adherence to QMA rules.

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Briggs & Stratton World Formula Engine Tech Manual | Manualzz

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Key features

  • Direct drive only
  • Electric starter removed
  • Recoil starter removed
  • Any gearbox approved
  • Fuel pump B&S part number 557033 allowed
  • Stock Walbro PZ26 carburetor required
  • Minimum gasket thickness between head bolt holes .041 inches
  • Minimum piston length is 1.768 in.
  • Stock, unaltered B&S "kidney bean" piston - part # 557001 only.

Frequently asked questions

Only gasoline is allowed, with no additives. See QMA Rule Book Article 9 for tech procedure.

Electric starter must be removed, recoil starter must be removed, gearbox is approved with modifications, oil breather must vent to a catch can, and a scatter shield is required.

The minimum exhaust pipe length is 0.520 inches, measured from the bottom of the exhaust flange to the end of the pipe.

A stock Walbro PZ26 carburetor ending in calibration number .A63 is required. No alterations are allowed.
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