i just bought one and it has three carburators
The dry weight of an 1990 model, 115 Mercury outboard is 326 lbs.
The plug gap for the 1990 model, 100 hp Mercury outboard is .040 in.
1990
50:1 or 16oz of oil to 6 gallons gas
The listed dry weight for a 1990 model, 75 hp Mercury outboard is 299 lbs.
A 35 hp Mercury outboard, serial number OC144498, would be a 1990 tear model.
A 115 hp Mercury outboard, serial number OC238909, would be a 1990 year model.
An 8 hp Mercury outboard, serial number OC231325, would be a 1990 year model.
1990-91.
The year, 1990
A 1990 Model, 40 hp Mercury outboard, has a dry weight of 182 lbs.
The "OC" model 75 hp Mercury outboards were manufactured in 1990.