As a 1998 248 Voyager owner - I have to agree that it's pretty much the same as the 228. One includes the motor mount length and one does not. With twin 150 original OX66 engines, I get 1 mpg when plowing through rough chop and 1.7 at best cruise (25-30 mpg) The two strokes smell terrible, give a headache when trolling, and drink like a sailor. I've had zero problems with them over the 8 years of ownership - but there are big negatives. The up front bump in price for the 4 stroke is worth it.
I'm in the year long process of repowering to a single 4.6L V8 300 Mercury (ridiculous lead times) for a rigged cost of $32k. So if you think a 10k penalty for the 4 stroke is alot - rethink that.
The twin engines also add a significant amount of weight to the transom of this boat. The new single merc will shave off more than 350# from the back and help out with the ride angle and deck scuppers. Full of gear, people and fuel - that rear section can be underwater. The twin 150s do have a ridiculous amount of power and responsiveness. Not so much for top speed - but hole shot and midrange torque is like a ski boat. 15x15 props. The replacement won't have nearly that much traction with a single screw in the water.
228 is a better boat. The Euro-transom of the Voyager is better than the old open transom - but the full transom and outboard bracket of the 228 is the best design. 228 Transom is also easier to add a kicker since it's flat and tall.
And yes - get the hard top.
248 Voyager with the twin Yamahas + Honda kicker:
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