Refit of 2006 boat

[Charlie]

I recently purchased a 2006 Nordship 40ds. Love the boat. Doña Marinita seems to be telling me she needs some preventative maintenance. The boat was very lightly used and had only 800 hours on the engine. I don't want to have problems. I plan on :

1) Adjusting the valves
2) Replacing the seals on the saildrive
3) Replacing the saildrive gasket
4) Replacing the impeller
5) Replacing the belt
6) Replacing the rear main seal
7)Replacing the mixing elbow
8)Inspecting the heat exchanger

What I am unsure of is whether or not to replace rubber parts such as:

Engine hoses
Motor mounts
Fuel lines

And what about the

Water pump
Through hulls

Thee standing rigging, the sails, and the running rigging have all been replaced.

Does anyone have a list of what to replace after a boat turns 18?