[HatTrick]

Boy it sure seems that this prop issue is pretty common. I just went through the same problem (not a huge problem certainly) and I think that dealers are really falling asleep on this one. Anyone repowering or buying a new boat is spending enough money to deserve the correct prop on the motor. When you go out to enjoy such a large investment the dealer shouldn't want you coming back to the dock shaking your head. If there are any dealers out there I would recommend:
1) Ask the customer if they want alum or SS.
2) Put the time into sea trials to identify the correct prop.
3) Since the customer is already dropping a bunch of money, offer a special price on an alum spare prop and prop wrench.

To those dealers already doing this I praise your attention to customer service, it's becoming a lost art.