Go to this site for info...........
Okeedokee....Follow me as I take you to a great Catalina website where you can download the owners manual, see the chronology of changes through them model years and learn about every aspect of the the 30. Great stuff.1) click on "resources"2) click on "Sailing Web Sites"3) click on Page 2 at the botom of the page4) scroll down and click on "International Catalina 30 Association" CONGRADS YOU ARE NOW ON A FANTASTIC RESOURCE SITE5) click on Technical Library on the left side6) Click on Catalina Yachts Library - chronology of improvments through the model yearsCheck out all the other info (Brochures, owners manual, systems, etc, etc).I suggest you join the Association. You'll get some great literature, quarterly Mainsheet Magazine and excellent technical advise on the 30. Cool decals too!!The newer the model the better as I see it. If you can get the wheel over the tiller you will have more cockpit space. If you can get the diesel over the gas engine, you can avoid the issue with fumes; however, the Atomic four is one heck of an enduring machine. The first diesel, the Universal 11 HP is considered to be underpowered by many for the 30 in currents, heavy seas and tidal situations. The Universal M-18 (14 hp) came out in 87-88 followed by the M-25 (22 hp). Look at your cruising area, tides and conditions and get the proper power you will need (Probably Atomic 4 gas vs. Universal Diesel 11 hp). Many changes evident through the model years, but the interior pretty much kept the same configuration. With that huge quarterberth and convertible dinette, you have plenty of space for a family for weekending and even extended cruising. We have the '88 Mark II model and love the wing-keel feature. Its a great family boat and with these boards and tons of support and parts vendors you've made a great choice. Very wise and downright necessary for a proper survey. Weak links are rusting keel bolts and the "Catalina Smile", mast compression post slumping (evident on deck), older wire harness issues, osmotic blistering, etc, etc. Good luckBob'88 Mark II"Breezin II"Lake Lanier, GA