finding yr of my old merc's 20hp and 115hp

[lakemichigansalmon]

can anyone tell me a place to look up the year of my old merc's i just purchased. they are thunderbolt ignition, one is a model 200 and the other is 1150. serial numbers are 3431104 and the 115 is serial 3849914. thanks for any help.

 

[Laddies]

Re: finding yr of my old merc's 20hp and 115hp

20hp--1972 115---1974