[Scott]

Peter
If you're buying a new motor why would you move the bracket to accommodate a 30" shaft yet go back to a 25" shaft ??

Unless I dont understand your question ?

The bracket should have been mounted such that it would run in the best location for a 25" shaft. Not to low as to create drag, not to high as to lose water flow (for your water pickup and cavitation)
There are old posts that address this ... how fast water rises coming off the hull and the offset used to get the motor mounted properly

I see this as having a 30" transom notch and putting a 25" shaft on it.

I think the offset is something like 1-1.5" higher (engine mounted on a bracket)for every 12" of setback (away from the transom) ??

I'm sure Don (Hermco) can get me straight on this ...