Trim motor problem.

[kydonky]

Not sure on how much fluid to add. I haven't had to do that since my first boat several years ago. I would just call a dealer or repair place and ask.

Check for an overflow port. That would be a small screw cap to remove. Fill untill fluid comes out of the overflow. Similar to the lower unit overflow port or a tractor hydraulic overflow port.

I would suggest having a mechanic do the repair as well. If you lost your fluid then you have a leak. Bad seal somewhere or a crack. A mechanic may be able to locate leak, replace an O ring or seal.

If you do it yourself check it out really good for a leak. Whe I check for leaks (in any number of situations) I place newspaper under and around the part suspect of leaking. If something drips on the newspaper it will show readily. May be one of the hydraulic lifts but they can be rebuilt.