Should be able to figure ratio by counting turns of prop compared to input shaft.
As for compatibility, I would guess not. Between DPA and DPE there were changes to teh transom shield and intermediate housing. I think it was with the DPC, so may not be a straight swap.
Many thanks for that. I suspected that I might have a transom assembly issue. The dpe drive comes with its otiginal transom assembly but I don't want to get into swapping all that. Just looking for a straight (uncomplicated, simple, quick,) swap.
Thanks for the response.