lost that is what i am. had aCV 20h.p. kohler blow on me found one on ebay got it in but they had sent me wrong engine. what they had sent me was aCV 25 hp kohler which right dia. crank but not long enough , can i make this crank longer it is about 1/2 to 3/4 inch to short. Got a good deal on it. any help would be greatly appr.