Changes in the International Maritime Dangerous Goods (IMDG) code have seen all articles containing engines (cars, machinery, lawnmowers, etc.) will now be classified as UN3166, or Class 9 Dangerous Goods.

The changes, coming into effect on 1^st January 2012, will now require all seafreight cargo containing an engine (either flammable liquid or gas) to comply with new regulations regarding how the cargo is presented prior to shipping.

Fuel tanks filled to one-quarter capacity, fuel shut-off valves securely closed and faulty equipment to undergo repairs – are just some of the changes now made mandatory by IMDG code, and it is the responsibility of the shipper to ensure the cargo complies. Documentation declaring the aforementioned will also have to be submitted before goods are loaded on board. The cargo also needs to be clearly labeled with UN3166 signage.

Another change also coming into force on 1^st January 2012 is the requirement that any seafreight containers containing dangerous goods in limited quantities will require the limited quantity mark on all four sides of the container.

This mark is in addition to any regular DG placards that are on the container.

Source:  http://shashikallada.wordpress.com/2011/12/04/un-3166-vehicle/