engine hatch actuator

So purchased a 2005 340 Sundancer 500hrs on engines 4 months ago. I had a survey so I was aware of most of the issues, and made an offer based on the issues. I had a local mechanic (half price) go through and replace or fix all hoses in engines and alternator, belts, heat exchangers, one...

I have been having some grief with my engine hatch actuator. Mine is the design where it is screwed to the keel stringer in between my Cat Diesels. It started making some noise so I removed it and dissembled the gearbox. Water and some rust!!!!! No damage so I cleaned it up and regreased...