Yeah, the hole is m16 I've decided I'm going to replace the mounts with the correct 140mm mounts. I'm assuming I can undo the coupling, hoist the engine up using a chain lift. Cut 20mm off end of tube and then replace engine and tube. Please telle if this is fantasy? Oh and it is no grease stern tube. I'm going to get a professional in to realign
On another note, how do I know if my coupling is flexible or not? I'm thinking if it's not when I do all this I might as well fit one. But no idea which one I have