-+ i have a 1987 20hp Mercury - mix is 50:1
This engine should have a VRO pump and if it has been bypassed the mixture is 50:1
Mercury outboard, 8hp, sn A721731 manufactured in 1987.
A 9.9hp Mercury outboard, serial number OB120743, is a 1987 year model.
1987
50.1 ratio
50 to 1
A 9.9 hp Mercury outboard, serial number OB103554 would be a 1987 year model.
A 35 hp Mercury outboard, serial number OB201519, would be a 1987 year model.
50/1
A 20 hp Mercury outboard, serial number OB152174, would be a 1987 year model.
A 9.9 hp Mercury outboard, serial number OA927309, is a 1987 year model.