The 32 Convertible (3227) is a great boat! (of course I would say that, as I have one) Does it have Mercruisers or Crusaders? Generator? Upper and lower stations? Fresh water or salt?
A frig is about $1000 for a direct 120/12V marine replacement - not a difficult job to replace except getting the new one through the door and down into the galley - but it will go in!
Water heater is located in the middle cabin and is pretty easy to get at - but if you replace, you may want to go with a smaller/on demand type at about 1500 watts and 1.5 to 2 gallons. If you go with a regular marine water heater, get the heat exchanger model that heats the water with engine heat - not much more expensive but does not require electrical to heat the water when you run an engine.
The A/C (if original) will be an R22 system, and R22 is not made/hard to find/expensive. You would need to replace it with a newer system and that's about $1600-2200 for a 16K BTU unit. The new unit will come with new controls that are much better than the original and don't require the water pump to run continuously. The A/C unit is located in the bottom of the locker in the center cabin and is not a difficult replacement.
The generator might be an issue depending on age and hours - the original would likely be a single cylinder Onan 4.5 Kw- these run pretty well but are fairly noisy. A replacement would be something like a Kohler 5E or Westerbeke that will be a pretty big ticket, but will be smoother and less noisy. Weight is a consideration here - as the generator is far astern in the boat.
These boats hold up well structurally, but watch for any leaks around windows and hatches that may let water drain down inside and get to the plywood cabin decking or wood trim. Check the bottom of the locker in the cockpit - the door often leaks water in and the floor will develop rot over time. Check the inside of the bench seat on the flying bridge for water damage. The sliding door rollers are subject to rust and wear and the door is not that easy to remove, but replacement parts are available and not expensive. The swim platform often gets soft due to water intrusion on the wood core. You can recore it from the bottom with new material or replace it. I've seen several 3227s where they replaced the swim platform with a larger one. I recored mine but reinforced it in stress areas.
Both Crusader and Merc engines are reliable if properly serviced up to about 1500-2000 hours, but you are talking about 30+ year old engines, so ignition/electronic parts will be at end of life. However these boats are pre-computer ignition, so the systems are pretty simple. Merc uses their proprietary Thunderbolt HEI system and Crusader uses a more generic system - if it works, don't fix it - but expect to replace any original items in the near future. The carburetors are likely Quadrajets - great when they work right, but sometimes develop internal leaks, and hard to rebuild unless you are an expert. There are several Q-jet specialty shops that will sell you a bolt-on replacement for about $300. I assume the boat has a closed cooling system, so look for the usual issues with the heat exchangers, hoses, strainers, etc.
The V-drives are pretty bullet-proof as long as long as oil has been checked and maintained, but the port side is hard to get to and some folks don't ever check it - that's why Carver put the warning lights on the panels. The lights often are on under 1200 RPM, but should go off about 1200 RPM unless the oil is low.
I hope this helps! Good luck and see you on the water!
