Mercury 4-Stroke 9.9 HP User Manual

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Propeller Installation
Standard Gear Case
WARNING
If the propeller shaft is rotated while the engine is
in gear, there is the possibility that the engine will
crank over and start. To prevent this type of acci-
dental engine starting and possible serious inju-
ry caused from being struck by a rotating propel-
ler, always shift outboard to neutral position and
remove spark plug leads when you are servicing
the propeller.
Flo-Torq I Drive Hub Propellers
a
c
b
d
a - Forward Thrust Hub
b - Propeller
c - Rear Thrust Hub
d - Propeller Nut – Tighten
Flo-Torq II Drive Hub Propellers
e
a
c
b
d
a - Forward Thrust Hub
b - Replaceable Drive Sleeve
c - Propeller
d - Rear Thrust Hub
e - Propeller Nut – Tighten
Big Foot Gear Case
WARNING
If the propeller shaft is rotated while the engine is
in gear, there is the possibility that the engine will
crank over and start. To prevent this type of acci-
dental engine starting and possible serious inju-
ry caused from being struck by a rotating propel-
ler, always shift outboard to neutral position and
remove spark plug leads when you are servicing
the propeller.
Flo-Torq I Drive Hub Propellers
a
c
b
a - Forward Thrust Hub
b - Propeller
c - Propeller Nut – Tighten
Flo-Torq II Drive Hub Propellers
a
c
b
d
e
a - Forward Thrust Hub
b - Propeller
c - Replaceable Drive Sleeve
d - Rear Thrust Hub
e - Propeller Nut

Mercury 4-Stroke 9.9 HP Specifications

General

Engine Type	4-Stroke
Horsepower	9.9 HP
Cylinders	2
Starting System	Manual or Electric
Weight	84 lbs (38 kg)
Full Throttle RPM Range	5000-6000 RPM
Gear Ratio	2.08:1
Fuel Induction System	Single Overhead Cam (SOHC)
Shaft Length	15" / 20"
Steering	Tiller or Remote
Fuel Type	Unleaded Gasoline
Alternator Output	6 Amps