1984-1986 Mercury Force 4HP Outboards Service Manual, Page 15Get this manual
Fuel level in ttle nozzle well depends on the fuel being consumed by the engine, which In turn depends on throttle openingFigure 4 THROTTLE
SHAFT ASSEMBLY
Flgur5Adjusting ThrottlFollow.r Arm IdlAdJu.tm.nt
Figure 4High Speed OperationIt is not necessary to remove engine cover to adjust idle screwIt can be adjusted through opening in support plate
CARBURETOR ADJUSTMENTS
ThrottlAdJustm.ntProper adjustment of the throttle follower on the throttle cam is important for obtaining good overall running quality and the best possible fuel economy