Make sure the legs on the u-shaped clevis are both perfectly parallel and perpendicular to the shaft. Bend the leg(s) with a needlenose pliers. Start reeling an instant BEFORE the bucktail hits the water. Most times that'll get the blade turning right away. If I can't get a blade to to no matter what, I cut the treble off for a spare and the lure goes into the garbage. A bucktail whose blade doesn't turn 99 out of 100 times is a worthless bait IMO. A Mepps has never let me down but others have.