What year is Merc Kiekhaefer 200 20hp outboard Serial number 2439731?

To determine the year of a Mercury Kiekhaefer 200 20hp outboard motor with the serial number 2439731, you can refer to the serial number chart provided by Mercury. Typically, for the 200 series, serial numbers in the range of 2430000 to 2450000 were produced around the mid-1960s. Thus, it is likely that this particular outboard motor is from the year 1966.