Help with year (x2) oldies

[kodibass]

I was just given 2 older merc outboards a 4.5 hp sn# 5398501 & a 20 hp sn# 5086223 could I get the year of manufacture for these please. thanks

 

[carholme]

Re: Help with year (x2) oldies

4,5 4.5 1-cyl 5270784 5595531 1979 USA

From here:

Mercury 2-takt, 1-cyl, 2,2 - 5 hp, produktions?r, modellguide

20 200/20 2-cyl 4819249 5183392 1978 USA

From here:

Mercury 2-takt, 2-cyl, 18-25 hp, produktions?r, modellguide

Gerry