I don't know about Lancers in particular, but things you should pay attention to on any boat include, but are not limited to;
. Find out how old it is (hopefully less than 10 years, 15 at the outside), and if its been "tuned", or adjusted, lately.
...halyards and sheets
need to be in good condition and adequately sized for the loads they'll see.
Ground tackle...anchor, chain, rode
(if present), and anchor-roller need to be sturdy, and more-than-adequate for the vessel. Don't skimp here.
Through-hulls...sound, no soggy wood bases. Make sure you know where every one is, and you can get to it. Exercise the handles to make sure each one operates correctly. Keep tapered wood plugs on hand in event of a failure.
shaft, and rudder
, glands...ensure that these important glands (where the prop and rudder
shaft exit the hull) have sufficient packing, and are adjusted correctly. Most are designed to allow just a drop or 2 of water
to pass, to lubricate the packing. Too much (too loose), or not enough (too tight) are not good. Make sure the two bolts controlling this are adjusted evenly.
Proper, working, navigation
lights...running, steaming, and anchor
Inspect the helm
, and its linkages. Get familiar with the quadrant, how it works, and potential failure modes (and their solutions).
...endless blah blah blah here. At least monitor oil
level (if appropriate), and operating temps. Carry spare raw-water impellers, and know how to replace one.
Batteries...assuming they're lead-acid, check water-level. Only add distilled water.
That's a good starting point. I'm sure I missed lots, but you get the idea. Hopefully the owner can shed light on all of these areas. If he can't, that by itself is something to be wary of...
Enjoy your boat!