I am working on a freinds 99 Bayliner Capri with a mercury Force 4 125 HP outboard. The hydraulic trim pump cylinder combo is leaking fluid out the bottom of the motor/pump through what looks a machined hole or in that general area. Where is the cheapest place to get a rebuild kit or whole assembly. He said it started leaking the first time he fired it this spring. I was wondering if there is any way for water to get in there and freeze. I am a jet boat guy who is jsut tryin ot help out a freind.