[jperez06]

I have a 6 HP Mercury Twin Kiekhaefer Corp motor with the serial number 1678154. Could you tell me what year this motor is?

Also would you happen to know where I could find a owners manual for it?

[Scaaty]

http://www.oldmercs.com/siteguide.html..check here..

[davebad22]

I think it's a 1964. Here is a link to a chart I found the s# on.
Sound about right?

http://www.maxrules.com/Merc_model_files/2p2-6.html