We noticed a small trickle of water coming into the bildge from the back plate?,while we where boating. The bildge pump seemed to run alot so thats why we looked. It's an 1999 18' Welcraft with a 305 chev and a mercruiser outdrive. I don't know what series outdrive it is yet but what do you suppose is leaking and how tough a job to repair. I'm pretty good with a socket and wrench...Regards,........Tom