A 90hp Mercury outboard, serial number 6114748 is a 1982 year model.
It is a 1965 Model year 90hp
The serial number, along with the horse power for Mercury outboards, will tell you the year model only. The serial number, and hp rating of a particular engine, is compared to a model year chart to determine the year of manufacture. Models produced in the early 80's and later, also have a model and year designation printed on the serial number label. Example.... 90ELPTO, 90hp, electric start, power trim, oil injected.
1964 90-S Starflite
if it is not clearly marked on the cowel you'll have to call mercury and have them source the serial number, while in the boat looking out the back on the center of your steering ram there will be a serial number as well as if you open the cowel and from same spot look back to the powerhead casting there will be another number on there witch you can source model and other info hope this helps
There are various models of Mercury 90hp engines with different compression ratios. Typically, compression ratios for a 90hp Mercury outboard engine range from 9:1 to 10:1. It's best to consult the specific model's technical specifications for accurate compression ratio information.
I have a 1984 90hp Mercury outboard and the fuel mixture is 50:1 which is one pint of 2 cycle motor oil for every 6 gallons of gas.
It is a 1965 model year Mercury 90HP.
Only the 3 cylinder models from 1987 and up
A 1987 Evinrude 90HP will weight around 120 pounds .G <a href="http://www.argoboat-ny.com"> Argo Boat </a>
im pretty sure its 50:1 but i would call a local mercury dealer just to make sure
The 3 cylinder model Mercury 90, uses a NGK BUHW-2, or Champion L78V. The 6 cylinder model, takes a NGK BUHW, or a Champion L76V.