trim/tilt leaking oil

[Legallimit]

I have been having a problem with my trim.tilt assembly leaking oil for past 2 seasons. My mechanic told me that the piston shaft has a pit on it, and oil leaks past seal. He said the whole assembly needs to be replaced. I have been adding oil every time I use boat. This last for the day only.
My question, is there a way to replace shaft and seals while motor on boat. I trailer so access no problem, and will this take care of problem? Is this something I can do myself? Also my concern is that if oil is leaking out, water is possible leaking past seal and getting in. If so, can i remove. Is it worth it to replace. Any help, please,

[boats.net]

Don't know what motor you have or which cylinder is leaking but if it's the center tilt cylinder then may have to remove power trim unit to get shaft out.

[vb23456]

2cyl Saltwater 150 tilt leak

I too am having tilt cylinder leak and have to add oil every other use or so. Where do I find info to fix this?

Thanks,
Skip
Va Beach, VA