OEM Ryobi clutch part number 307091001, replaces part numbers 300756007, 300756006, 3075601, 300756001. Fits models: RYOBI RY251PH 25cc String TrimmerRY252CSVNM 25cc String TrimmerRY253SS 25cc String TrimmerRY253SSVNM 25cc String TrimmerRY254BC 25.4cc BrushcutterRY254BCVNM 25.4cc BrushcutterRY25CSEMCVNM 25cc String TrimmerRY25PHEMC 25cc String TrimmerRY60511A Gas CultivatorRY60511B Gas CultivatorRY60512 Gas CultivatorRY60514 Gas CultivatorRY60520 Gas Cultivator TORO/HOMELITE 51930 Curved-Shaft Trimmer51930A Curved-Shaft Trimmer51932 Straight-Shaft Trimmer51932A Straight-Shaft Trimmer51934 Brushcutter51934A Brushcutter51936 Curved-Shaft Trimmer51938 Straight-Shaft Trimmer51940 Brushcutter51944 25.4cc Gas Power Head519455194651947 25.4 cc Gas Power Head51948 25.4 cc Gas Power Head51950 Curved Shaft String Trimmer51950A Curved Shaft String Trimmer51952 Curved Shaft String Trimmer51954 17 in. Gas Trimmer - Curved Shaft51955 17 in. Gas Trimmer - Curved Shaft51956 17 in. Gas Trimmer - Curved Shaft51957 17 in. Gas Trimmer - Curved Shaft51958 17 in. Gas Trimmer - Curved Shaft51970 Straight Shaft String Trimmer51970A Straight Shaft String Trimmer51972 Straight Shaft String Trimmer51973 Straight Shaft String Trimmer51974 18 in Gas Trimmer - Straight Shaft51975 18 in Gas Trimmer - Straight Shaft51976 18 in. Gas Trimmer - Straight Shaft51977 18 in. Gas Trimmer - Straight Shaft51978 18 in. Gas Trimmer - Straight Shaft51978A 18 in. Gas Trimmer - Straight Shaft51990 Brushcutter51990A Brushcutter51992 Brushcutter51993 Brushcutter51998 18 in. Gas Trimmer - Straight Shaft BLACKMAX BM25TEC String Trimmer