Rotax 277 A GEAR DRIVE, Free Air with drive shaft offset towards engine base
Rotax 277 "A" GEAR DRIVE, FA Drive shaft offset towards engine base, for FREE-AIR installation spark plug up (SS)
Rotax 277 "A" gear drive fan cooled engine Drive shaft offset towards engine base, for FREE AIR engine installation spark plug up (SS) or down (HS)
Rotax 277 "A" gear drive FAN-COOLED engine installation spark plug down (HS)
