I believe that one of my trim cylinders is leaking on my Yami 250 TXRY (204 hours on each). I was tilting up my engine after a trip this weekend and noticed that the pump was making a gurgling sound and was tilting the engine very slowly until the trim piston rods were at their maximum stroke. At this point, the tilt cylinder raised the engine to the full up position without a problem which makes me think it is only the trim cylinders that are not working properly (leaking). I also noticed a fairly large oil sheen on the water behind my boat. Would anyone know if this is a difficult repair that should be tackled by a factory mechanic? Thank you.