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Form No. 3379-226 Rev A

21in Mulching/Rear Bagging Lawn
Mower

Model No. 10730—Serial No. 314000001 and Up

Model No. 10732—Serial No. 314000001 and Up

Model No. 10734—Serial No. 314000001 and Up

Model No. 17730—Serial No. 314000001 and Up

Model No. 17732—Serial No. 314000001 and Up

Model No. 17734—Serial No. 314000001 and Up

Operator's Manual

Receive a free side-discharge chute by
completing the

Discharge Chute Order

Form

when you register your product at

www.Lawn-Boy.com! Please allow four to five
weeks for delivery.

Introduction

This rotary-blade, walk-behind lawn mower is intended
to be used by residential homeowners. It is designed
primarily for cutting grass on well-maintained lawns
on residential properties. It is not designed for cutting
brush or for agricultural uses.

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.

g024069

1

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 2 words to highlight information.

Important

calls attention to special mechanical information

and

Note

emphasizes general information worthy of special

attention.

© 2013—Lawn-Boy® Inc.
8111 Lyndale Avenue South
Bloomington, MN 55420

Register at www.LawnBoy.com.

Original Instructions (EN)

Printed in the USA

All Rights Reserved

*3379-226* A

Summary of Contents for 10730

Page 1: ...rly 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...

Page 2: ...Starting the Engine 9 Using the Self propel Drive Self propel models only 10 Stopping the Engine 10 Mulching the Clippings 10 Bagging the Clippings 10 Operating Tips 11 Maintenance 12 Recommended Main...

Page 3: ...rain could cause a slip and fall accident Tall grass can hide obstacles Do not mow on wet grass or excessively steep slopes Poor footing could cause a slip and fall accident Do not mow near drop offs...

Page 4: ...a caution when servicing them Do not change the engine governor setting or overspeed the engine Maintain or replace safety and instruction labels as necessary To best protect your investment and maint...

Page 5: ...plug wire and 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...

Page 6: ...coil starter Rope in the Rope Guide Important To start the engine safely and easily whenever you use the machine install the recoil starter rope in the rope guide Hold the blade control bar to the upp...

Page 7: ...high and you run the engine you may damage the engine 6 Install the dipstick securely Important Change the engine oil after the first 5 operating hours change it yearly thereafter Refer to Changing th...

Page 8: ...roved for use Never use gasoline that contains more than 10 ethanol by volume such as E15 contains 15 ethanol E20 contains 20 ethanol or E85 contains up to 85 ethanol Using unapproved gasoline may cau...

Page 9: ...height levers as shown in Figure 9 Figure 9 1 Raise the machine 2 Lower the machine Important The cutting height settings are 32 mm 1 1 4 inches 44 mm 1 3 4 inches 57 mm 2 1 4 inches 70 mm 2 3 4 inch...

Page 10: ...Figure 15 Mulching the Clippings Your machine comes from the factory ready to mulch the grass and leaf clippings back into the lawn If the grass bag is on the machine remove it before mulching the cl...

Page 11: ...Adjusting the Cutting Height page 9 When cutting grass over 15 cm 6 inches tall mow at the highest cutting height setting and walk slower then mow again at a lower setting for the best lawn appearanc...

Page 12: ...ore annual storage Yearly Change the engine oil Replace the blade or have it sharpened more frequently if the edge dulls quickly Refer to your Engine Operator s Manual for any additional yearly mainte...

Page 13: ...e by pulling gently on the upper corners of the cover If the cover comes loose repeat steps 4 and 5 Changing the Engine Oil Service Interval After the first 5 hours Yearly Run the engine a few minutes...

Page 14: ...arger to the wire harness located below the ignition key Figure 21 Figure 21 2 Plug the charger into a wall outlet Note When the battery no longer holds a charge recycle or dispose of the lead acid ba...

Page 15: ...when servicing the blade 1 Disconnect the spark plug wire from the spark plug Refer to Preparing for Maintenance page 12 2 Tip the machine onto its side with the air filter up 3 Use a block of wood to...

Page 16: ...ar 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 machine may creep when you disengage the bar Cleaning the Under...

Page 17: ...lug and tighten it with a torque wrench to 20 N m 15 ft lb 8 Tighten all nuts bolts and screws 9 Charge the battery for 24 hours then unplug the battery charger an store the machine in an unheated are...

Page 18: ...Notes 18...

Page 19: ...Notes 19...

Page 20: ...rts such as filters fuel lubricants oil changes spark plugs air filters blade sharpening or worn blades cable linkage adjustments or brake and clutch adjustments Components failing due to normal wear...

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