The mechanic looked at my boat today. As I explained before, trim and
tilt acting up. Progressively worse over a period of few weeks. Just
bought boat.

Anyway, mechanic says the seals need replaced in both trim cylinders
and the tilt cylinder as well to the tune of $300 per cylinder.

He said it'd probably be cheaper to get a whole new unit. I've been
checking and it's definitely cheaper to get a whole used unit either a
rebuilt one (~500-600) or just straight used (~300). I'm not sure
what labor costs would be associated with swapping out the unit. Does
the outboard have to be removed to do that? 115 hp Yamaha on a 16'
McKee Craft. Also not sure if I can offset the cost by selling the
core unit back out.

The good news is that the motor itself checks out okay.