Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 81Get this manual
7Install pump onto engi neTorqu to 50-60 lbin(S .6-6.B Nm) 8Insta ll hoses onto proper fittings and secure with sta-straps9Run eng ine and check for leaks 3If necessary, adjust float level by bending float hinge within bend area of hinge as shown
Carburetor Adjustments
Float Adjustment
NOTE: Fl oat level adjustment is the onl adj ustment made to adjust fl oat1Turn carbu retor upside downRemove screws secu ring float bowl and remove fl oat bowl'8089
a Hinge Bend Area 01 Hinge
IMPORTANT: 207 cu Inengines have cross over fuel Intake design for each cylinderCarburetors mounted In front of cylinders 1, and actually provide luel lor cylinders 2, and 6Carburetors mounted in front of cylinders 2, and actually provide luellor cylinders 1, and 5This must be kept in mind II jetting Is to be changed, particularly for cylinder whose main Jet Is slightly richer than the other cylinders