Maintenance And Repair Instructions; Cleaning And Storage; Troubleshooting; Specifications - MTD Yard-Man YM2BV Manual De Uso

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.
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the frequency stated in the table. These procedures should also be
a part of any seasonal tune-up.
NOTE: 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.
NOTE: 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.
NOTE: 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.
FREQUENCY MAINTENANCE REQUIRED
Before starting the engine Fill the fuel tank with fresh fuel mixture
Every 10 hours Clean and re-oil the air filter
Every 25 hours Check the spark plug condition and gap
AIR FILTER MAINTENANCE
WARNING:
To avoid serious personal injury, always turn your
trimmer off and allow it to cool before you clean or service it.
WARNING:
Wear gloves to prevent injury when handling unit.
Cleaning the Air Filter
Failure to maintain your air filter properly can result in poor performance or can cause
permanent damage to your engine.
1. Open the air filter cover. Push the locking tab on the top of the cover inward, then
pull the air filter cover out and down. (Fig. 20).
2. Remove the air filter (Fig. 21).
3. Wash the filter in detergent and water. Rinse the filter thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly coat the filter.
5. Squeeze the filter to spread and remove excess oil.
6. Replace the filter (Fig. 21).
NOTE: If the unit is operated without the air filter, you will VOID the warranty.
7. Reinstall the air filter cover. Position the slots on the bottom of the air filter cover
onto the tabs at the bottom of the back plate (Fig. 21).
8. Swing the cover up until the tab on the air filter backplate snaps into place in the
slot on the air filter cover (Fig. 22).
IDLE SPEED ADJUSTMENT
WARNING:
This unit will need to be running during idle speed
adjustment. Wear protective clothing and observe all safety
instructions to prevent serious personal injury.
Also, DO NOT set unit on any surface except a clean, hard area while
starting or performing any adjustments. Debris, such as gravel, sand,
dust, grass, etc., could be thrown by the blower tube and damage
property or cause serious injury to bystanders or operator.
The idle speed of the engine is adjustable. An idle adjustment screw is between the
air filter cover and the engine starter housing (Fig. 23).
NOTE: Careless adjustments can seriously damage your unit. An authorized
service dealer should make carburetor adjustments.
If, after checking the fuel and cleaning the air filter, the engine still will not idle, adjust
the idle speed screw as follows:
1. Start the engine and let it run at a high idle for a minute to warm up. Refer to Starting/Stopping Instructions.
2. Release the throttle trigger and let the engine idle. If the engine stops, insert a small Phillips in between the air filter
cover and the engine cover (Fig. 23). Turn the idle speed screw in, clockwise, 1/8 of a turn at a time (as needed)
until the engine idles smoothly.
Checking the fuel, cleaning the air filter, and adjusting the idle speed should solve most engine problems. If not and all
of the following are true:
• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
Have the carburetor adjusted by an authorized service dealer.
REPLACING THE SPARK PLUG
Use a replacement part number 753-06193. The correct spark gap is 0.025 in. (0.635 mm).
1. Stop the engine and allow it to cool.
2. Grasp the plug boot firmly and pull the cap from the spark plug.
3. Clean dirt from around the spark plug. Remove the spark plug from the cylinder
head by turning a 5/8 in. socket counterclockwise.
CAUTION:
Do not sand blast, scrape, or clean electrodes. Grit in
the engine could damage the cylinder.
4. Replace cracked, fouled or dirty spark plug. Set the spark gap at 0.025 in. (0.635
mm) using a feeler gauge (Fig. 24).
5. Install a correctly-gapped spark plug in the cylinder head. Turn the 5/8 in. socket clockwise until snug.
If using a torque wrench, torque to:
110-120 in.•lb. (12.3-13.5 N•m)
Do not over tighten.
6. Reinstall the spark plug boot.
WARNING:
clean or do any maintenance on it.
CLEANING
Use a small brush to clean off the outside of the unit. Do not use strong detergents. Household cleaners that contain
aromatic oils such as pine and lemon, and solvents such as kerosene, can damage the plastic housing or handle. Wipe
off any moisture with a soft cloth.
STORAGE
• Never store a fueled unit where fumes may reach an open flame or spark.
• Allow the engine to cool before storing.
• Store the unit locked up to prevent unauthorized use or damage.
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
SEE
LONG TERM STORAGE
If planning on storing the unit for an extended time, use the following storage procedure:
p. 3
1. Drain all fuel from the fuel tank into a container with the same 2-cycle fuel mixture. Do not use fuel that has been
stored for more than 30 days. Dispose of the old fuel/oil mix in accordance with federal, state and local regulations.
p. 5
2. Start the engine and allow it to run until it stalls. This ensures that all fuel has been drained from the carburetor.
p. 5
3. Allow the engine to cool. Remove the spark plug and put 5 drops of any high quality motor oil or 2-cycle oil into the
cylinder. Pull the starter rope slowly to distribute the oil. Reinstall the spark plug.
NOTE: Remove the spark plug and drain all of the oil from the cylinder before attempting to start the unit after storage.
Locking Tab
4. Thoroughly clean the unit and inspect it for any loose or damaged parts. Repair or replace damaged parts and
tighten loose screws, nuts or bolts. The unit is ready for storage.
Air Filter Cover
Fig. 20
CAUSE
Locking Tab
Air Filter THE ENGINE WILL NOT START
The fuel tank is empty
The primer bulb was not pressed enough
Back
Plate
The engine is flooded
The fuel is old and/or improperly mixed
Tabs
The spark plug is fouled
Fig. 21
THE ENGINE WILL NOT IDLE
Locking Tab
The air filter is plugged
The fuel is old and/or improperly mixed
Improper idle speed
THE ENGINE WILL NOT ACCELERATE
Air Filter Cover
The fuel is old and/or improperly mixed
Fig. 22
The air filter is plugged
Idle Adjustment
Screw THE ENGINE LACKS POWER OR STALLS
The fuel is old and/or improperly mixed
The air filter is plugged
The spark plug is fouled
NOTE: For repairs beyond the minor adjustments listed above, locate your nearest authorized service center by
calling the Customer Support Department at 1-800-800-7310 (U.S.) or 1-800-668-1238 (Canada).
Fig. 23
UNIT*
Engine Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 cc
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,600–4,200 rpm
Operating RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,800–8,500 rpm
Blower Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 mph (233 kmh)
Blower Air Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445 cfm (12.6 cmm)
Mulching Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to 10:1
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 in. (0.635 mm)
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture
0.025 in.
Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40:1
(0.635 mm)
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 oz. (414 ml)
Approximate Weight (no fuel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 lbs. (5.44 kg)
* All specifications are based on the latest product information available at the time of printing. We reserve the right
Fig. 24
to make changes at any time without notice.

CLEANING AND STORAGE

To avoid serious personal injury, always turn your unit off and allow it to cool before you

TROUBLESHOOTING

SOLUTION
Fill the fuel tank with properly mixed fuel
Press the primer bulb fully and slowly 10 times
Move the choke lever to Position 3, hold down the
trigger and pull the starter rope
Drain the fuel tank and add fresh, properly mixed fuel
Clean, gap or replace the spark plug
Clean or replace the air filter
Drain the fuel tank and add fresh, properly mixed fuel
Adjust according to the Idle Speed Adjustment section
Drain the fuel tank and add fresh, properly mixed fuel
Clean or replace the air filter
Drain the fuel tank and add fresh, properly mixed fuel
Clean or replace the air filter
Clean, gap or replace the spark plug

SPECIFICATIONS

5