The lower unit on the '74 40 was shot, so we bought a '75 Evinrude 40 off of Craigslist, that the same tiller would fit on. Just to spruce it up, the lower unit seals were replaced, the carb was rebuilt, and the spark plugs, points, and condensers were replaced. The fuel pump and flywheel were swapped over from the '74, as the flywheel on the '75 was cracked.