It depends, oil should be changed annually. But if you're putting those kind of hours on a trip in a short period of time (a month or two etc,.),...
I don't think much grows in freshwater, so bottom paint there doesn't need to be so effective, but does have to be compatible. I haven't...
Call a CAT dealer. Gaugesavers might be able to fix the screen.
Sherwin Williams makes house paint, I wouldn't use anything from them on a bottom. Seahawk, Micron. and Trinidad make bottom paint that is ok...
Dealer should be able to look up the part numbers with your serial number.
You want the MAN 1200s. 1000s aren't enough HP to make the hull shine, get on top, ride right. Sunseeker and most Euro builders aren't known for...
Galleons are not built that great. The 66' Sunseeker is a GREAT sea boat. I put close to 10,000 NM's on one. 26 knot cruise, good range, great...
I recommended he replace the 25+ year old system with a modern one that he could get down the street. I'm not repairing any 25 year old head...