Just looking at that pic from chrisallse, I see the hydraulic pipes are quite loose looking.
Not having a seastar system, I don't know, but how does that work? - does the cylinder attach to the engine, and the ram stay fixed?..... I have seen something like this on another local rib, and they kept having to replace the hydraulic pipes due to constant bending and unbending / general wear etc... usually ending up with fluid over the deck of the boat near the transom.....
Looking through my manual, I have an Ultraflex 'Drake'(?) front mount hydarulic outboard cylinder - http://www.ultraflexgroup.it/ut/hydrafl/hydrafl.html
Maybe a bit overkill for a 75hp engine, but it's a tidy system that doesn't have too many turns from lock to lock and is very easy to handle on higher power turns in both dirs.