With the 3400, outboard or
diesel was an option. This carried thru for the first year or two of the 105 model before they removed the outboard option.
Unfortunate as the
4 stroke outboards were just starting to come on strong but missed their window. We swapped out the
2 stroke that came on our 3400 with a
4 stroke and wouldn't want to deal with the expense and
maintenance requirements of the diesel/stillete.