Compression Post Rot
Bob Poff's correct that there have been issues with the compression post and cross beam rotting due to water penetration. It should be noted that this is more common on boats made after 1983 that did not have the aluminum mast base casting (normally painted black) under the mast. Later boats without the base had water intrusion around the deck electrical pass-thru tubing inside the mast because of too short of a stand-off. Wrinkles in the fiberglass of the cross-beam arch on the head side of the mast post are the telltale signs.
The chainplate issue is a relatively new one on the forum and bears watching to see if it is endemic to the model run.
These boats also had gate not ball valve thru-hulls that need to be looked at in survey and replaced immediately if necessary.
Fixed port light leaks are common, as are gasket compression leaks of the opening ports due to age-affected rigidity--solutions for both well documented on the forum.
The Yanmar is near bullet proof with prescribed regular care. The relay issue is due to an insufficient gauge wire between the starter button and the starter motor solenoid--another well documented solution that exists.
You'l need at least 12K but probably better off with 16K air conditioning down there. Battery location is a PITA, but others have moved them to other locations within the salon. Two water tanks, one on the port side and one in the stern (if you can't find it). Replacement rudders from Foss Foam in Florida are available if needed. Earliest models may have smaller rudders (came from the H31), later ones are a little broader. Have not noticed any problems with mine.
Under sail, it is a tad tender above 15 knots due to the tall rig, but the first reef in the main should be in by then. Run a 135 headsail to not overpower it. Ran across the Chesapeake last fall with just a partially rolled in 135 in 25+ knots, doing over 6 knots SOG--had no tendency to bury the nose in the quartering sea of 3 to 4 footers. Performs very well in light air on a broad reach too. Steering hasn't been noted as tender, but doesn't like a heavy weather helm (traveller down helps). Prop walks to port in reverse, but driving straight with a light throttle hand can be learned and achieved.