Your McCulloch equipment has a factory model number and serial number on a sticker-like label or metallic tag attached to the unit in a place away from moving parts (usually near the handle, under the seat, or on the side of the unit). The best way to buy repair parts for your McCulloch is to begin by searching for your McCulloch model number on PartsTree and use the OEM McCulloch parts diagrams to find the parts that fit exactly like the originals from the McCulloch factory. When you locate your McCulloch model tag, take a picture for future repair parts needs. here