Spare Part Check List

I asked our diesel mechanic to come up with a list of stuff to keep onboard based on failures he had seen in the field, and ready availability of parts from the manufacturers.
In addition to the things Pascal listed, we kept plenty of copper crush washers in various sizes needed for the fuel systems.
We keep a spare set of injectors and a spare raw water pump for our genset.

I think it's necessary to ask what kind of cruising this boat does since most boats do no more than day cruising and will simply be towed in when something goes wrong. A lot of money can get wasted. Of course, if the boat does extensive cruising the sky's the limit. Murphy's Law guarantees that what breaks will be the one item you don't have. I think props, belts and racor filters should top you list however.

Not sure about the Inferred thermometer but Yep, I agree with that list.

Oh hang on, missing the big hammer. (That's for dealing with the Electronics.)

As NYCAP said "depends on what it does" and to a great extent where it does it. There of course are the basics, belts and pump impellers for all the engines, a variety of hardware, a couple of GFCI outlets and a few breakers that fit the panel, 3 changes of fuel filters, set of props and maybe shafts (mostly because of the lead times to get them made)... Most Ferrettis don't go very far, and with todays environment of "just in time" logistics, it doesn't make a lot of sense to carry a bunch of expensive parts onboard, especially with these sport cruisers where weight and space are at a premium. There is also the factor with parts stored on a boat that they become corroded and trashed before they get used. I've run into that more than a few time when I'd get called in for a repair and need a part and the owner goes "Got one" only to pull it out of the packaging to find junk. With electronic parts, there are continuous upgrades and "superceeded by"s that it's usually in your interest to get them when you need them. The more economically viable solution is to have good towing insurance than to make a large parts investment. A world cruiser obviously has different requirements and I'd have spare turbos, a couple of head and cylinder kits, injectors, hoses......

Teaminvicta, Do you have a f/t captain? If not, how mechanical are you? A P/T captain is going to make emergency repairs to get you home or more likely call a tow. Unless you are very hands on (which doesn't really go with that boat) spare parts are almost useless. Some hose wrap in case of a split, a spare belt and filters. Spare props because they can take a week or more to get and whacking one is not that uncommon (I've heard ). I wouldn't bother with shafts. If they're bent you've got other problems and not moving for awhile. Again it really depends on where, and what type of cruising. The wonderful thing today is that everything can be Fed-Ex'd. I once had an exhaust coupling blow in Charleston enroute to Miami on a Sunseeker. I believe we had it in 3 days.

Try 12...

1) Duct tape
2) Spare blender motor

Well supplied electrical spares and terminal box with proper tools.
Spares for tenders.
AirCon spares.
Toilet spares.
Spare fluids.
Oil sorbs.

True sailors always have a spare bottle of rum on board in case the primary supply(s) run out.
Priorities people! Priorities!