Troy-Bilt 1900678 - Manual (Page 19)

There are three operating positions identified on the
throttle control: CHOKE, F-S (Fast-Slow), and STOP.
The Fast and Slow settings are provided with detent
type stops that “catch” the lever when those settings
are engaged. To move the lever out of the detent stops,
push the lever a short distance to the right.
Before starting the engine, always make sure that
the blade drive and wheel drive controls are disengag­
ed. Then, move the throttle lever all the way forward
(past the Fast detent stop) to the CHOKE position. As
soon as the engine starts, gradually pull the lever back
to the Slow detent stop. Do not leave the throttle in the
choke position. Doing so could harm your engine.
NOTE: A warm engine requires less choking than a
cold engine.
Once the engine is sufficiently warm, move the lever
to the desired engine speed for your particular mowing
task. The engine is designed to be operated at full
speed to give you the best cut and fastest traction drive
(on self-propelled models). However, if preferred,
slower speeds can be used.
To stop the engine, release the blade and wheel
drive control handles, put the engine throttle lever in
the Slow position, and then pull the throttle lever all the
way back to the STOP position.
FUEL SHUT-OFF VALVE
(8 HP Engine Only)
The 8 HP (24" mower) engine is equipped with a
fuel shut-off valve. The valve is located on the back of
the engine below the air cleaner assembly. See Photo
3-5.
To shut off the fuel flow to the carburetor, turn the
valve clockwise until it stops turning. To open, turn the
valve counterclockwise several turns. Always remember
to open the fuel valve before attempting to start the
engine.
NOTE: Close the fuel shut-off valve when the engine is
transported to prevent fuel leakage.
Photo 3-5: Fuel shut-off valve (8 HP engine).
ENGINE RECOIL STARTER
On all models, the recoil starter rope handle is
located on top of the engine, on the right side as view­
ed from the operator’s position behind the handlebars.
See Photo 3-6.
Photo 3-6: Engine recoil starter rope (5 HP engine
shown).
To start the engine, first place your left hand on the
right side handlebar grip to help stabilize the mower.
Then grasp the starter rope handle with your right
hand and pull the rope out slowly until it is harder to
pull because of engine compression. Next, pull the
rope with a rapid, continuous, full-arm stroke. Do not
let the starter rope snap back against the rope guide.
Let the rope rewind slowly.
KEY SW ITCH STARTER
(Electric Start Engine Only)
The key switch starter for electric start engines is
located on the right handlebar. See Photo 3-7. There
are three operating positions identified on the switch:
OFF, RUN, and START.
Photo 3-7: Key switch starter
To start the engine, first insert the key firmly into the
slot. Then, turn the key to the START position. Do not
hold the key in the start position for longer than a few
seconds. Prolonged cranking can damage the starter
motor if cranked more than 15 seconds per minute.
When the engine starts, release the key and It will
automatically return to the RUN position.
There are two ways to stop the electric start engine:
1. Release the blade control and wheel drive handles,
put the engine throttle lever in the SLOW position, and
then pull the throttle lever all the way back to the STOP
position. Turn the key to the OFF position and remove
the key.
2. Release the blade control and wheel drive handles,
then put the engine throttle lever in the SLOW posi­
tion. Turn the key to the OFF position and remove the
key.
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