Authentic Gravely 59118500 ELEC CLUTCH – HD/PTZ/APEX. OEM replacement part for Gravely 05118900 Clutch, Ogura Double Spring (Superseded to 59118500). Clutch Only – This is the OEM replacement clutch made by Ogura. 991152 (ZT HD 48). 991154 (ZT HD 52). 991156 (ZT HD 60). 991160 (ZT HD 44). 991162 (ZT HD 48). 991188 (Pro-Turn Z 52). 991190 (Pro-Turn Z 60). 991254 (Pro-Turn Z 48). 991151 – Ariens Apex 60 Zero-Turn Mower, Kawasaki FR. 991153 – Ariens Apex 48 Zero-Turn Mower, Kohler. 991155 – Ariens Apex 52 Zero-Turn Mower, Kohler. 991157 – Ariens Apex 60 Zero-Turn Mower, Kohler. 991159 – Ariens Apex 52 Zero-Turn Mower, 23hp Kawasaki FR. 991161 – Ariens Apex 48 Zero-Turn Mower, 23hp Kohler. 991163 – Ariens Apex 60 Zero-Turn Mower, 24hp Kawasaki FR. 991173 – Ariens Apex 48 Zero-Turn Mower, Kohler, CARB. 991311 – Ariens Apex 48 Zero-Turn Mower, Kawasaki FR. 991312 – Ariens Apex 52 Zero-Turn Mower, Kawasaki FR. 991316 – Ariens Apex 48 Zero-Turn Mower, 23hp Kawasaki FR. 991324 – Ariens Apex 48 Zero-Turn Mower, 23hp Kawasaki FR, Side-Discharge. 991327 – Ariens Apex 52 Zero-Turn Mower, 23hp Kawasaki FR, Rear-Discharge. Clutch Only (Not the kit) Replaces. Has been superseded to.