Briggs & Stratton CXi Serie Manuel D'utilisation page 14

For engines greater than 80 cc displacement and less than 225 cc displacement:
Category C = 125 hours, Category B = 250 hours, Category A = 500 hours
For engines of 225 cc or more displacement:
Category C = 250 hours, Category B = 500 hours, Category A = 1000 hours
80008114 (Rev F)
14 BRIGGSandSTRATTON.com