We have a gator 6x4 that has one of these and the crank bushing seized up on it. Contacted deere and they say they can;t get a new bushing have to get a new block for a cool g. or new motor for 1900. They said they were going to check with kaw to see if they can get just the bushing. my quiestion is if they can't what material should i use to have one made out of . the old one was almuinum but was thinking or going brass like i have seen in several old briggs flathead kart motors. anybody else done this before