Another boat for the A4
If I were looking at two boats - same model, condition, etc, I would go with the inboard every time - no question. At the price you say your boat is worth, I would probably not consider most boats with an outoard. You complain about the upkeep costs of your A4 and I wonder what they may be to cause such concern. Spend $75 for electronic ignition and forget about points after that. The rest of the ignition only needs to be replaced every two or three years. Oil change is 3 qts. You can get most of it at your local NAPA.Compare that to the price of a new 9.9 + the bracket, plus running controls to the cockpit and you are well over $1k. That will buy an awful lot of A4 maintenance and a folding prop.Do you race? Otherwise, I would question the need for worrying about the prop on a C27. this is not a knock against the boat - I think they are great boats, but what is an extra quarter knot really going to gain you unless you race? Another answer to this problem is to mark your shaft so that the prop is lined up vertically behind the strut. That will help some. If you do race PHRF you can have your rating adjusted becasue you do not have a folding prop.Add to this the inconveniece of leaning over the transom to raise and lower the engine, the prop popping out of the water, the lost power and torque, less control with prop behind the rudder, loss of battery charging and I think you lose a lot,My opinion.