its held on with 4 nuts.it takes apart as follows, phililp screw in middle.spring under screw, small cover remover and has 1 dog held with a little screw. (do i need 2 dogs? ) the pully seems fine. i see that the outside case is worn and missing some of the round metal that holds the pullyin place. i wish i had a town dump neer me to scavange parts. i start the h35 and leave the recoil starter on the ground. last week it stalled 1 mile away. man that s*cked