Starting/Stopping Instructions; Operating Instructions; Maintenance & Repair Instructions - Cub Cadet BC5090 Manual De Operación

OIL AND FUEL INFORMATION
The use of fuel additives, such as STA-BIL® Gas Stabilizer or an equivalent, will inhibit corrosion and minimize the
formation of gum deposits. Using a fuel additive can keep fuel from forming harmful deposits in the carburetor for up to
six (6) months. Add 0.8 oz. (23 ml) of fuel additive per gallon of fuel according to the instructions on the container.
NEVER add fuel additives directly to the unit's gas tank.
FUELING THE UNIT
WARNING:
Remove fuel cap slowly to avoid injury from fuel spray.
Never operate the unit without the fuel cap securely in place.
WARNING:
DO NOT USE E85 FUEL IN THIS UNIT. It has been
proven that fuel containing greater than 10% ethanol will likely
damage this engine and void the warranty.
1. Remove the fuel cap (Fig. 19).
2. Place the gas container's spout into the fill hole on the fuel tank (Fig. 19) and fill the tank.
NOTE: Do not overfill the tank.
3. Wipe up any gasoline that may have spilled.
4. Reinstall the fuel cap.
5. Move the unit at least 30 ft. (9.1 m) from the fueling source and site before starting the engine.
NOTE: Dispose of the old gasoline in accordance with federal, state and local regulations.

STARTING/STOPPING INSTRUCTIONS

WARNING:
Operate this unit only in a well-ventilated outdoor area.
Carbon monoxide exhaust fumes can be lethal in a confined area.
WARNING:
Avoid accidental starting. Make sure you are in the
starting position when pulling the starter rope (Fig. 22). To avoid serious
injury, the operator and unit must be in a stable position while starting.
STARTING INSTRUCTIONS
1. Check the oil level in the crankcase. Refer to Checking the Oil Level.
2. Fill the fuel tank with fresh, clean unleaded gasoline. Refer to Fueling the Unit.
NOTE: There is no need to turn the unit on. The On/Off Control is in the ON ( I )
position at all times (Fig. 20).
3. Fully press and release the primer bulb 10 times, slowly. Some amount of fuel
should be visible in the primer bulb and fuel lines (Fig. 21). If fuel can not be seen
in the bulb, press and release the bulb until fuel is visible.
4. Place the choke lever in Position 1 (Fig. 21).
5. Crouch in the starting position (Fig. 22). Press the throttle lockout in and squeeze
the throttle control lever. Pull the starter rope 5 times.
6. Place the choke lever in Position 2 (Fig. 21)
7. Press the throttle lockout in and squeeze the throttle control, pull the starter rope
in a controlled motion 3 to 5 times to start engine.
8. Keep the throttle squeezed and allow the engine to warm up for 30 to 60 seconds.
9. Continue squeezing the throttle control, move the choke lever to Position 3 (Fig. 21)
and continue warming the engine for an additional 60 seconds. The unit may be
used during this time.
NOTE: Unit is properly warmed up when engine accelerates without hesitation.
IF... the engine hesitates, return the choke lever to Position 2 (Fig. 21) and
continue warm-up.
IF... the engine does not start, go back to step 3.
IF... the engine fails to start after a few attempts, place the choke lever in Position 3 and squeeze the throttle
control. Pull the starter rope out with a controlled and steady motion 3 to 8 times. The engine should start. If
not, repeat.
IF WARM... If the engine is already warm, go back to step 5.
STOPPING INSTRUCTIONS
1. Release your hand from the throttle control. Allow the engine to cool down by idling.
2. Press and hold the On/Off Control switch in the OFF (O) position until the unit comes to a complete stop (Fig. 20).

OPERATING INSTRUCTIONS

HOLDING THE TRIMMER
WARNING: Always wear eye, hearing, foot and body protection to
reduce the risk of injury when operating this unit.
Before operating the unit, stand in the operating position (Fig. 23). Check for the following:
• The operator is wearing eye protection and proper clothing
• With a slightly-bent right arm, the operator's right hand is holding the shaft grip
• The operator's left arm is straight, the left hand holding the assist handle
• The unit is at waist level
• The cutting attachment is parallel to the ground and easily contacts the grass without the need to bend over
ADJUSTING TRIMMING LINE LENGTH
WARNING:
Do not remove or alter the line cutting blade assembly. Excessive line length will make
the clutch overheat. This may lead to serious personal injury or damage to the unit.
The Bump Head™ cutting attachment allows you to release trimming line without stopping the engine. To release
more line, lightly tap the cutting attachment on the ground (Fig. 24) while operating the trimmer at high speed.
NOTE: Always keep the trimming line fully extended. Line release becomes more difficult as the cutting line
becomes shorter.
Each time the head is bumped, about 1 inch (25.4 mm) of trimming line is released. A blade in the cutting attachment
shield will cut the line to the proper length if excess line is released.
For best results, tap the Bump Head™ on bare ground or hard soil. If line release is attempted in tall grass, the engine
may stall. Always keep the trimming line fully extended. Line release becomes more difficult as the cutting line
becomes shorter.
NOTE: Do not rest the Bump Head™ on the ground while the unit is running.
Some line breakage will occur from:
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick, stalky weeds
• Forcing the line into objects such as walls or fence posts
TIPS FOR BEST TRIMMING RESULTS
• For best trimming results, operate unit at full throttle.
• Keep the cutting attachment parallel to the ground.
• Do not force the cutting attachment. Allow the tip of the line to do the cutting, especially along walls. Cutting with
more than the tip will reduce cutting efficiency and may overload the engine.
• Cut grass over 8 inches (200 mm) by working from top to bottom in small increments to avoid premature line wear
or engine drag.
• Cutting from left to right improves the unit's cutting efficiency. Clippings are thrown away from the operator.
• Slowly move the trimmer into and out of the cutting area at the desired height. Move either in a forward-backward
or side-to-side motion. Cutting shorter lengths produces the best results.
• Trim only when grass and weeds are dry.
• The life of your cutting line is dependent upon proper adherence of explained
trimming techniques, what vegetation is cut, and where vegetation is cut.
For example, the line will wear faster when trimming against a foundation wall as
opposed to trimming around a tree.
DECORATIVE TRIMMING
Decorative trimming is accomplished by removing all vegetation around trees, posts,
fences and more.
Rotate the whole unit so that the cutting attachment is at a 30° angle to the ground (Fig. 25).
USING THE CUTTING BLADE
WARNING:
Always wear eye, hearing, foot, body protection and the shoulder strap to reduce the risk
of injury when operating this unit.
WARNING:
Do not use the cutting blade for edging or as an edger. Severe personal injury to yourself
or others can result.
Before operating the unit with the cutting blade, stand in the operating position (Fig. 23). Refer to Holding the Trimmer.
4
Cutting Blade Operating Tips
Gas Can Spout
To establish a rhythmic cutting procedure:
• Plant feet firmly, comfortably apart.
Fuel Cap
Fuel Tank
• Bring the engine to full throttle before entering the material to be cut. At full throttle the
Fig. 19
blade has maximum cutting power and is less likely to bind, stall or cause blade thrust
(which can result in serious personal injury to the operator or others).
• Cut while swinging the upper part of your body from left to right.
• Always release the throttle trigger and allow the engine to return to idle speed
when not cutting.
• When you are finished, always unsnap the unit from the harness before taking off
the harness.
• Swing the unit in the opposite direction as the blade spins, which increases the cutting action.
• After the return swing, move forward to the next area to be cut plant your feet again.
• The cutting blade is designed with a second cutting edge. You can use it by removing the blade, turning it upside
down, and reinstalling it.
To reduce the chance of material wrapping around the blade, follow these steps:
ON (I) OFF (O)
• Cut at full throttle
• Swing the unit into material to be cut from your left to your right (Fig. 26)
• Avoid the material just cut as you make the return swing
Throttle
Control
Fig. 20
Choke Lever Primer Bulb
MAINTENANCE SCHEDULE
Fig. 21
Starting Position
Starter
Perform these required maintenance procedures at the frequency stated in the table. These procedures should also be
Rope
a part of any seasonal tune-up.
NOTE:
NOTE:
Throttle
Control
NOTE:
Fig. 22
FREQUENCY
Every 10 hours
Change 1st 10 hours
Every 25 hours
LINE INSTALLATION
This section covers both SplitLine® and standard
single line installation.
Always use original equipment manufacturer 0.105 in.
(2.67 mm) replacement line. Other types of line may
make the engine overheat or fail.
There are two methods to replace the trimming line:
• Wind the inner reel with new line
• Install a prewound inner reel
Winding the Existing Inner Reel
Fig. 23
1. Hold the outer spool with one hand and unscrew the bump knob clockwise (Fig. 27).
Inspect the bolt inside the bump knob to make sure it moves freely. Replace the
bump knob if damaged.
2. Remove the inner reel from the outer spool (Fig. 27).
3. Remove spring from the inner reel (Fig. 27).
4. Use a clean cloth to clean the inner reel, spring, shaft and inner surface of the
outer spool (Fig. 28).
5. Check the indexing teeth on the inner reel and outer spool for wear (Fig. 29). If
necessary, remove burrs or replace the reel and spool.
NOTE:
Single Line Installation
Go To Step 8 for SplitLine® Installation
6. Take approximately 18 feet (6 m) of new
trimming line, loop it into two equal lengths.
Insert each end of the line through one of the
two holes in the inner reel (Fig. 30). Pull the line
through the inner reel so that the loop is as
small as possible.
7. Wind the lines in tight even layers, onto the reel
(Fig. 31). Wind the line in the direction indicated
on the inner reel. Place your index finger
between the two lines to stop the lines from
overlapping. Do not overlap the ends of the
line. Proceed to step 11.
Fig. 24
SplitLine® Installation
8. Take approximately 10 feet (3 m) of new
trimming line. Insert one end of the line through
one of the two holes in the inner reel (Fig. 32).
Pull the line through the inner reel until only
about 4 inches is left out.
9. Insert the end of the line into the open hole in
the inner reel and pull the line tight to make the loop as small as possible (Fig. 32).
10. Before winding, split the line back about 6 inches.
11. Wind the line in tight even layers in the direction indicated on the inner reel.
NOTE:
12. Insert the ends of the line into the two holding slots (Fig. 33).
13. Insert the ends of the line through the eyelets in the outer spool and place inner
reel with spring inside the outer spool (Fig. 34). Push the inner reel and outer spool
together. While holding the inner reel and outer spool, grasp the ends and pull
firmly to release the line from the holding slots in the reel.
Fig. 25
NOTE:
14. Hold the inner reel in place and install the bump knob by turning counterclockwise. Tighten securely.
INSTALLING A PREWOUND REEL
1. Hold the outer spool with one hand and unscrew the bump knob clockwise (Fig. 27). Inspect the bolt inside the
bump knob to make sure it moves freely. Replace the bump knob if damaged.
2. Remove the old inner reel from the outer spool (Fig. 27).
3. Remove the spring from the old inner reel (Fig. 27).
4. Place the spring in the new inner reel.
NOTE:
5. Insert the ends of the line through the eyelets in the outer spool (Fig. 34).
6. Place the new inner reel inside the outer spool. Push the inner reel and outer spool together. While holding the inner
reel and outer spool, grasp the ends and pull firmly to release the line from the holding slots in the spool.
7. Hold the inner reel in place and install the bump knob by turning counterclockwise. Tighten securely.
OPERATING INSTRUCTIONS
WARNING:
Blade thrust may occur when the spinning blade contacts an object that it does not
immediately cut. Blade thrust can be violent enough to cause the unit and/or operator to be propelled in any
direction, and possibly lose control of the unit. Blade thrust can occur without warning if the blade snags,
stalls or binds. This is more likely to occur in areas where it is difficult to see the material being cut.
WARNING:
The blade continues to spin after the engine is turned off. The coasting blade can
seriously cut you if accidentally touched.
WARNING:
Do not sharpen the cutting blade. Sharpening the blade can cause the blade tip to break
off while in use. This can result in severe personal injury to yourself or others. Replace the blade.
WARNING:
Do not clear away any cut material with the engine running or blade turning. To avoid
serious personal injury, turn off the engine. Allow the blade to stop before removing materials wrapped
around the blade shaft.
MAINTENANCE AND REPAIR INSTRUCTIONS
WARNING:
To prevent serious injury, never perform maintenance or repairs with unit running. Always
service and repair a cool unit. Disconnect the spark plug wire to ensure that the unit cannot start.
Some maintenance procedures may require special tools or skills. If you are unsure about these procedures
take your unit to any non-road engine repair establishment, individual or authorized service dealer.
Maintenance, replacement, or repair of the emission control devices and system may be performed by any
non-road engine repair establishment, individual or authorized service dealer.
Please read the California/EPA statement that came with the unit for a complete listing of terms and
coverage for the emissions control devices, such as the spark arrestor, muffler, carburetor, etc.
MAINTENANCE REQUIRED
Clean and oil air filter
Change oil
Change oil
Check rocker arm to valve clearance and adjust
Check spark plug condition and gap
WARNING:
Never use metal-reinforced line, wire, chain or rope. These can break off and become
dangerous projectiles.
Always use the correct line length when installing trimming line on the unit. The line may not release
properly if the line is too long.
Failure to wind the line in the direction indicated will cause the cutting
attachment to operate incorrectly.
The spring must be assembled on the inner reel before reassembling the cutting attachment.
The spring must be assembled on the inner reel before reassembling the cutting attachment.
Fig. 26
Outer Spool
Spring
Inner Reel
Bolt
Bump Knob
Fig. 27 Fig. 28
Index Teeth
Fig. 29
Loop
Fig. 30 Fig. 31
Loop
Holding Slots
Fig. 32 Fig. 33
Fig. 34
SEE
p. 5
p. 5
p. 5
p. 5
p. 5
Spring