280 is 280,,,, be it twin 140's or a single 225. The 225 was the biggest that Yamaha had back in 1988. Throw some sandbags on the transom to equal the weight of the Zuk and see how she sits in the water. My buddy had a '88 228 that he put my old F225 3.3 on and had no issues. I fished it many...