http://www.offshoreonly.com/forums/s...threadid=49383

Here is the link detailing the whole @^*%#^ $! process.

Yep, as you already know the engine must come out. If the splined coupler is worn on the OD put it back together in the bearing using some Loctite retaining compound. Most likely it will be rusted, good idea to polish it and replace the seal. Make sure to note the seal location as there is no shoulder, it will go in too far if you keep pushing on it.