Not really about Montgomery boats, but there's a lot of knowledge out on this list, so I'll ask anyway. Dolphin has an inboard diesel -- a 2-cylinder Yanmar weighing about 220 pounds (according to the manual). The rubber engine mounts rest on two engine beds that look, in section, like inverted U shapes with a flange on one side for the mounts. The beds rest on stringers glassed into the hull. The beds are corroded badly enough that it's time to replace them, and ditto for the metal parts of the mounts. Luckily, there is a hatch in the cockpit floor and access from the cabin is unobstructed and the whole width of the engine room. (Of course, if there wasn't a hatch the water wouldn't have leaked in to corrode the beds...). This means that I can get at the engine with relative ease. Here's my plan: Disconnect the prop shaft flange, fuel pipes, exhaust, water inlet, electrical connections and control cables. Remove the bolts that hold the engine mounts to the beds and slide the whole thing (engine, transmission and old mounts) forward and then down (about 6 inches) onto the cabin floor (suitably protected with a piece of plywood. Given that the engine weighs about the same as a well-fed human, I'm thinking that with one helper I can do this without rigging up a hoist that would have to allow it to swing forward. A local sheet metal company say that they can duplicate the beds for me in stainless steel (don't want to do this again) and the new mounts are already waiting in the garage. Put the new mounts on the new beds (I line them up with holes drilled in a plywood template that matches the engine), get the helper back. Lift, slide, wrench (bolts, not back), reconnect, align. Start engine. What could possibly go wrong? If anybody has experience with doing something like this, I'd be most grateful if you could let me know what you wish that you'd known before starting. If you see what I mean. Giles Morris M-15 Umiaq Vancouver 25 Dolphin