Year is unimportant on Tohatsu/Nissan OB's. Model/serial is everything. Assuming you are looking at an MFS25B. That motor is EFI, and very reliable; quite smooth at 3 cylinders. We have not had any warranty issues, and no major repairs on the 25/30B motors. As always with any OB, verify cooling and compression before buying. If it hasn't been done recently, change oil, filter, and LU lube, as well as the wp kit. As with any 4-stroke, do not overfill the oil; 1/2 to 3/4 on the stick is good. As with any EFI, drain the vapor separator in the off season. Best to disconnect the gas line when not in use, to avoid over-pressurizing the fuel system due to solar heating.