The prop on my 2.5 Yamaha started to slip at high speed so took it off and went to local prop shop snd low and behold no new prop ..we phoned around town and none available ..prop guy told me of a trick he has used..carve out the old rubber ehich eas vulcanised in onto the bushing clesn prop snd bushing with sandpaper and acetone ..set on a flat surface eith bushing in place ..set a bolt in the bushing hole snd mix up some two part epoxy and pour between bushing and prop..did not beleive it but it works