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SERVICE AND ADJUSTMENTS
CARBURETOR
Note: Adjust the carburetor
for better starting
and low
speed
operation.
The high speed system, which meters fuel from high
idle to wide open throttle, is factory equipped with a
jet that is not adjustable. The jet can be replaced with
a jet for high altitude operation. Consult your Sears
Service Center for installation. The Idle Mixture isad-
justable.
ENGINES
THAT
HAVE
BEEN
RE-JETTED
FOR
HIGH
ALTITUDE
OPERATION
MUST
BE
RE-
JE'I-rED
WHEN
OPERATING
AT A LOWER
ALTI-
TUDE
OR SERIOUS
ENGINE
DAMAGE
CAN RE-
SULT.
INITIAL SE'i-rlNG
IMPORTANT:
DO NOT OVERTIGHTEN
- NEEDLE
AND SEAT MAY BE DAMAGED.
BEFORE STARTING MOTOR
•
Remove motor cowl.
•
Turn idle adjustment
needle in, clockwise, until it
seats lightly (Figure 24).
•
Back
needle
out one and one half (1-1/2)
full
turns.
FINAL ADJUSTMENT
IMPORTANT:
DO NOT
ADJUST
LEANER
THAN
NECESSARY
TO OBTAIN
SMOOTH
IDLING.
IT IS
BE'n'ER
TO HAVE IDLE SET A LITTLE
RICH THAN
TOO
LEAN.
A LEAN
SETTING
CAN CAUSE
MO-
TOR DAMAGE.
With boat tied securely to dock, start motor and
run until fully warmed
up.
Set controls to lowest reliable idle in gear position.
Turn idle adjustment
needle slowly open, coun-
terclockwise,
until motor loses power and begins
to roll do to an over-rich mixture.
Note this posi-
tion (Figure 24).
Slowly tum needle closed, clockwise, until motor
runs smoothly and begins to pick upspeed.
Con-
tinue turning clockwise until motor pops or stalls
due to lean mixture.
Note this position.
Set needle halfway between
the two positions.
•
Repeat as needed for fine tuning.
Figure
24
- 23 -
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