The blade is molded to the shaft and must be replaced as an assembly. The fan tower must be removed to do the job. It's not to difficult and can be done with the engine in the sled. The pipe, recoil, recoil cup, lower pulley and right front engine mount must be removed before the tower can be removed. Check the bearings for the fan to make sure they are good. I have a perfect fan assembly for a Phazer with bearings, top and bottom pulleys and belt if you need them. $35 + shipping. 262-767-9023
Good Luck, Phil (opsled)