OEM Oregon Part Number 33-130. Oregon 33-130 Electric PTO Clutch Ariens Gravely Zoom PM34Z Zero-Turn Mowers. OEM Oregon Part Number 33-130 OEM Oregon Part Number 33-130 Please Refer to Original Equipment Owners Manual to verify Compatibility. This product is brand new and will come in original factory packaging. We are proud to be a factory authorized retailer. We use several different carriers and choose the most economical for the item and destination based on the estimated transit time displayed.