Operator’s Manual
Viper® 99cc 4-Cycle Engine
11
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7. Turn the On/Off switch to the ON position.
SEE FIGURE 6
8 Grasp starter handle and pull out slowly, until resistance is
felt. Without letting it retract, pull rope with a rapid stroke.
DO NOT
pull out the rope all of the way. Let it return to its
original position very slowly. Repeat this step until engine
starts.
9. After engine begins operating, move choke lever to “Half
Choke.”
SEE FIGURE 4.
10. Run engine for 30 to 45 seconds at “Half Choke” position
until engine warms up.
11. After starting the engine, slowly move the choke lever to
the “Open Choke” position as the engine warms up. Move
throttle to desired speed.
SEE FIGURE 3
To Stop the Engine:
1. Set the throttle lever to the low speed position and allow the
engine to run at low speeds for 1-2 minutes before stopping.
2. On manual-start models, turn the On/Off switch to the OFF
position.
SEE FIGURE 7
3. Pull the starter handle slowly and return the handle to its
original position when resistance is felt. This operation will
prevent outside moisture from entering the combustion
chamber.
A
B
A
B
FIGURE 6
FIGURE 7
