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But the I hit a rock took a small chunk out of the prop and the vibration got worse especially when turning left. I pulled the drive today and the gimble bearing seems smooth and the ujoints feel good. I think I need a prop.
You definately need a prop, whether it's your old one repaired, or preferably a new one, you are still better off with the non optimal pitched prop than one that causes a vibration. Lets consider what a vibration is in relation to drive components, it is essentially an unbalance that causes undue wear and tear on moving components. In the short term there are safety measures in check, which will protect the vital components, however although these are life extending components (bushings etc.) when these components are faced with an out of balance condition they wear quickly (similar to an annodes functionality)leaving the major components of the drive unprotected, and through continued exposure, extreme wear and fatigue will ultimately cause the major components to FAIL. This will result in many more of your hard earned dollars to be spent to rectify the problem. As for your prop choice if you are unsure how it should or will perform stick to the more forgiving, and cheaper aluminum prop which is close to, or the same as the one you have incidently damaged.
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