On the older model Merc's, the serial number and horsepower rating are compared to a model/year chart. This chart has a serial number run listing for the various models manufactured in a particular year. The late model engines now print the year of manufacture on the sticker affixed to the swivel bracket.
To find the year model of a Mercury outboard, both the serial number, and the horsepower of the engine, are needed.
In order to find the year model for a Mercury outboard, the horsepower, in addition to the serial number, is needed.
Both the serial number, and the horse power rating are needed to determine the year model of a Mercury outboard.
2.5 mercury serial no. OD992320 WHAT YEAR IS IT
You have to check with the serial number that is on the engine.
In order to find the year model of a Mercury outboard, you will need to know both the engine serial number, and the horsepower rating.
To find out how old a 4HP Mercury outboard is, you can look at the label on the transom bracket, where you will see a two digit number giving you the year it was built.
From what I can find in serial number tables, your outboard is made in 1975. My refernce: http://www.marinshopen.se/Hj%c3%a4lpmedel/Modellguide/Mercury/3565Hk/tabid/107/Default.aspx
The serial / model number sticker on a 1997 model, 25 hp Mercury outboard is located on the starboard, (right) side of the swivel bracket.
Here is a website you can go to find out.. www.oldmercs.com
Look for a silver tag on the starboard transom bracket
I cant find the year does any one know it's a 9.9