Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 83Get this manual
STANDARD CARBURETOR JETTING
MAIN JET
WO-8-2A .078
IDLE JET
VLS VL6 VL1 .060 VL' VL3 VL VL' VL
VENT JET
VL VL' VL, VL
.078 .078 .084 .078
.060 .060 .060 .060
.080 .080 .080 .080
WO-S-3A WO-8-4A WO-S-5A WO-8-6A
Bottom Bottom
Center Center
WO-9-4WO-9-1 WO-9-4WO-9-2 WO-9-3 WO-9-4 WO-9-S WO-9-6