Engine family: 6ehxs.0334ra - Displacement: 30.1 cc - Emission compliance period: 300 h (EPA Phase 2 / California Tier 2) - Emission control: engine modification & catalyst (label on engine) - Guide bar / chain combinations (3/8" chain): 12" - 12a4cd3745 (Oregon 90SG 45) 14" - 14a4cd3752 (Oregon 90SG 52) 16" - 14a4cd3757 (Oregon 91VG 57).