Carburetor Adjustments; Trailering Boat/Outboard - Mercury 50 User Manual

CARBURETOR ADJUSTMENTS

The carburetors have been cal~brated and
pre-set at factory to provide best perfornl-
extreme changes in weather and/or eleva-
tion may necessitate further carburetor
adjustment.
IMPORTANT: To maintain peak engine
performance when operating at HIGHER
ELEVATIONS, it will be necessary to in-
stall a LEANER fixed high speed jet. (See
your authorized service facility.)
LOW SPEED MIXTURE
Pre-set lo* speed mixture screws as fol-
lows:
Lightly tighten screw-turn clockwise
Back-out screw 1-1/4 turns counter-
clockwise.
When trallerlng or transporting the boat/
outboard. ~t recommended that outboard
remain In normal operating p o s ~ t ~ o n
Tilt lock mechanism (on non power trtm
models) is NOT intended to support out-
board durtng trailering. Damage to boat or
outboard could occur if add~tional support
is not used.
Start engine Allow to run at IDLE for
several minutt s
With engine k t IDLE, shift to FORWARD
GEAR.
T u r n s c r c d counterclockwrse u n t l l
engine starts "load-up" or fire unevenly
(TOO RlCH I
S l o w l y t ' ~ n screw c l o c k w f s e untrl
engrne fires a ! eqly anti RPM Increases
creases and misfires (TOO LEAN)
Set low spero rnixture screw at polnt mid-
way betwreri -00 R I L H and TOO LEAN
When in dould, set s,ightly RICH rather
If ddequata rodd cleardnce presents a
problem, placf3outboard In full tilt-up posl-
b e t w e e n s w vel b r a c k e t a n d c l a m p
brackets Low :r outboard to rest o n block