1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 89Get this manual
3Install float pin and needle valveNeedle valve should slide into valve seat on float
5Install float bowl53674
aScrew (4)Float Bowl Retaining Screw Float Float Pin Needle Valve
Silencer Installation
1Install plate, silencer, and retaining plateInstall
bolts and collars53679
NOTE: Measure float height with carbo scale, repace float if height is not within specification (10.0O.5mm(O.39O.02 in)Take measurements at the mid-line of the float opposite its pivot sideAfter installing, check for smooth movement of the float28380