background image

Form No. 3361-328 Rev B

20in Mulching/Rear Bagging Lawn
Mower

Model No. 10640—Serial No. 290000001 and Up

Model No. 10640C—Serial No. 290000001 and Up

Model No. 10641—Serial No. 290000001 and Up

Model No. 10641C—Serial No. 290000001 and Up

Model No. 10642—Serial No. 290000001 and Up

Model No. 10642C—Serial No. 290000001 and Up

Model No. 10643C—Serial No. 290000001 and Up

Model No. 10644C—Serial No. 290000001 and Up

Model No. 10645—Serial No. 290000001 and Up

Model No. 10646—Serial No. 290000001 and Up

Model No. 10647—Serial No. 290000001 and Up

Operator's Manual

Introduction

Read this information carefully to learn how to operate
and maintain your product properly and to avoid injury
and product damage. You are responsible for operating
the product properly and safely.

You may contact Lawn-Boy directly at
www.Lawn-Boy.com for product and accessory
information, help finding a dealer, or to register your
product.

Whenever you need service, genuine Lawn-Boy parts,
or additional information, contact 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. Write the numbers in the
space provided.

Figure 1

1.

Model and serial number plate

Model No.

Serial No.

This manual identifies potential hazards and has
safety messages identified by the safety alert symbol
(Figure 2), which signals a hazard that may cause serious
injury or death if you do not follow the recommended
precautions.

Figure 2

1.

Safety alert symbol

This manual uses two words to highlight information.

Important

calls attention to special mechanical

information and

Note

emphasizes general information

worthy of special attention.

Warning

CALIFORNIA

Proposition 65 Warning

The engine exhaust from this product

contains chemicals known to the State of

California to cause cancer, birth defects,

or other reproductive harm.

Important:

This engine is not equipped with a

spark arrester muffler. It is a violation of California

© 2008—Lawn-Boy® Inc.
8111 Lyndale Avenue South
Bloomington, MN 55420

Register at www.Lawn-Boy.com.

Original Instructions (EN)

Printed in the USA

All Rights Reserved

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...

Reviews: