1971.
1972
the serial number is 6548158
An 85 hp Mercury outboard, serial number 3858432, would be a 1973 year model.
Thank you for your reply, the HP is 7.6 Mercury Thunderbolt In order to determine the year model for a Mercury outboard, in addition to the serial number, the engine horsepower is needed as well.
Serial number 1999327
In addition to the serial number, the horsepower rating is needed to determine the year model.
Merc 850 854590512 thru 4831998 1977
visit on the web oldmercs.comselect the model guide.you can identify the year up to 1985 from this list
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