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Public Resource Code Section 4442 to use or operate
the engine on any forest-covered, brush-covered, or
grass-covered land. Other states or federal areas
may have similar laws.

This spark ignition system complies with Canadian
ICES-002.

The enclosed

Engine Owner’s Manual

is supplied

for information regarding the US Environmental
Protection Agency (EPA) and the California
Emission Control Regulation of emission systems,
maintenance, and warranty. Replacements may be
ordered through the engine manufacturer.

For models with stated engine horsepower, the gross
horsepower of the engine was laboratory rated by the
engine manufacturer in accordance with SAE J1940.
As configured to meet safety, emission, and operating
requirements, the actual engine horsepower on this class
of lawn mower will be significantly lower.

Do not tamper with the engine controls or alter the
governor speed; doing so may create an unsafe condition
resulting in personal injury.

Safety

This lawn mower meets or exceeds the CPSC blade
safety requirements for walk-behind rotary lawn mowers
and the B71.1 specifications of the American National
Standards Institute in effect at the time of production.

Read and understand the contents of this manual
before you start the engine.

The safety alert symbol (Figure 2) is used to alert you
to potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible injury
or death. Improperly using or maintaining this mower
could result in injury or death. To reduce this potential,
comply with the following safety instructions.

The following instructions have been adapted from the
ANSI/OPEI standard B71.1-2003.

This cutting machine is capable of amputating
hands and feet and of throwing objects. Failure
to observe the following safety instructions could
result in serious injury or death.

General Operation

Read, understand, and follow all instructions on the
machine and in the manual(s) before starting.

Do not put hands or feet near or under the machine.
Keep clear of the discharge opening at all times.

Only allow responsible adults, who are familiar with
the instructions, to operate this machine.

Clear the area of objects such as rocks, wire, toys,
etc., which could be thrown by the blade. Stay
behind the handle when the engine is running.

Be sure the area is clear of bystanders before
operating. Stop machine if anyone enters the area.

Do not operate machine barefooted or while wearing
sandals. Always wear substantial footwear.

Do not pull machine backward unless absolutely
necessary. Always look down and behind before and
while moving backward.

Never direct discharged material toward anyone.
Avoid discharging material against a wall or
obstruction. Material may ricochet back toward
the operator. Stop the blade when crossing gravel
surfaces.

Do not operate machine without the entire grass
catcher, discharge guard, rear guard, or other safety
protective devices in place and working.

Never leave a running machine unattended.

Stop the engine and wait until the blade comes
to a complete stop before cleaning the machine,
removing grass catcher, or unclogging the discharge
guard.

Operate machine only in daylight or good artificial
light.

Do not operate machine while under the influence
of alcohol or drugs.

Never operate mower in wet grass. Always be sure
of your footing; walk; never run.

Disengage the drive system, if so equipped, before
starting the engine.

If the machine should start to vibrate abnormally,
stop the engine and check for the cause immediately.
Vibration is generally a warning of trouble.

Always wear eye protection when operating machine.

See manufacturer’s instructions for proper operation
and installation of accessories. Only use accessories
approved by the manufacturer.

Slope Operation

Slopes are a major factor related to slip and fall accidents,
which can result in severe injury. Operation on all slopes
require extra caution. If you feel uneasy on a slope, do
not mow it.

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Summary of Contents for 10640

Page 1: ...an Authorized Service Dealer or Lawn Boy Customer Service and have the model and serial numbers of your product ready Figure 1 identifies the location of the model and serial numbers on the product W...

Page 2: ...nd follow all instructions on the machine and in the manual s before starting Do not put hands or feet near or under the machine Keep clear of the discharge opening at all times Only allow responsible...

Page 3: ...fill containers inside a vehicle or on a truck or trailer bed with a plastic liner Always place containers on the ground away from your vehicle before filling Remove gas powered equipment from the tr...

Page 4: ...read the instructions before servicing or performing maintenance 4 Cutting dismemberment hazard of hand or foot mower blade stay away from moving parts and keep all guards and shields in place 5 Cutt...

Page 5: ...th oil in the engine but it does come with a bottle of oil 1 Remove the dipstick Figure 4 Figure 4 2 Slowly pour oil into the oil fill tube until the oil level reaches the Full line on the dipstick Fi...

Page 6: ...gnition key electric start models only 3 Air filter 10 Grass bag 4 Fuel tank cap 11 Battery electric start models only 5 Oil fill Dipstick 12 Cutting height levers 4 6 Recoil start handle 13 Battery c...

Page 7: ...or daily 1 Remove the dipstick wipe it clean and fully install the dipstick Figure 9 Figure 9 2 Remove the dipstick and check the oil level Figure 9 If the oil level is below the Add mark on the dipst...

Page 8: ...Engine 1 Firmly push in the primer 3 times with your thumb holding the primer in for a second before releasing it each time models 10643C and 10644C only Figure 11 Figure 11 Note If the air temperatu...

Page 9: ...uthorized Service Dealer Figure 16 Mulching the Clippings Your mower comes from the factory ready to mulch the grass and leaf clippings back into the lawn If the grass bag is on the mower remove it re...

Page 10: ...n appearance If the grass is too long the mower may plug and cause the engine to stall Mow only dry grass or leaves Wet grass and leaves tend to clump on the yard and can cause the mower to plug or th...

Page 11: ...dulls quickly Refer to your Engine Operator s Manual for any additional yearly maintenance procedures Important Refer to your Engine Operator s Manual for additional maintenance procedures Preparing f...

Page 12: ...s 1 Perform the pre maintenance procedures refer to Preparing for Maintenance 2 Remove the dipstick Figure 21 Figure 21 3 Tip the mower onto its side with the dipstick down to drain the used oil out t...

Page 13: ...mportant You will need a torque wrench to install the blade properly If you do not have a torque wrench or are uncomfortable performing this procedure contact an Authorized Service Dealer Examine the...

Page 14: ...pel drive bar and ensure that the cable is loose Note The cable must be loose with the self propel drive bar in the released position otherwise the mower may creep when the bar is disengaged Cleaning...

Page 15: ...corrosion during the off season 7 Loosely install the spark plug 8 Tighten all nuts bolts and screws 9 Charge the battery for 24 hours then unplug the battery charger an store the mower in an unheated...

Page 16: ...tarting difficulties due to the following Failure to follow proper maintenance procedures Rotary mower blade striking an object Contaminants in the fuel system Improper fuel consult your Operator s Ma...

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