1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 110Get this manual
S Install stem gasketS Install fuel bowl gasket S Install float bowl
51119Stem GasketFuel Bowl Gasket
aFloat BowlScrew (4) Torque 18 lbin(2.1 Nm)
NOTE: If spring clip on inlet needle was removed, or if needle was replaced, be sure spring clip is reattachedS Attach spring clip on inlet needle to metal float tab and place needle into its seat
IDLE AIR SCREW
Idle air screw is preset by the manufacturer and is NOT for field serviceIf the idle air screw should become misadjusted, set air screw at 14 TURN OUT from LIGHTLY SEATED positionaSpring ClipFloat Tab