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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
© 2008—Lawn-Boy® Inc.
8111 Lyndale Avenue South
Bloomington, MN 55420
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
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.
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.
Important: This engine is not equipped with a
spark arrester muffler. It is a violation of California
Register at www.Lawn-Boy.com.
Form No. 3361-328 Rev B
Figure 2
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.
Original Instructions (EN)
Printed in the USA
All Rights Reserved

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Questions and answers

Daniel
May 11, 2025

Which model 10641 is compatible with? Which other model is the grass bag compatible with?

1 comments:
Mr. Anderson
May 20, 2025

The Lawn-Boy models compatible with part number 10640 are:

- 10640 (290000001–290999999)(2009) 20In Mulching/Rear Bagging Lawn Mower
- 10640C (290000001–290999999)(2009) 20In Mulching/Rear Bagging Lawn Mower
- 10641 (290000001–290999999)(2009) 20In Mulching/Rear Bagging Lawn Mower
- 10641C (290000001–290999999)(2009) 20In Mulching/Rear Bagging Lawn Mower
- 10642 (290000001–290999999)(2009) 20In Mulching/Rear Bagging Lawn Mower
- 10647 (290000001–290999999)(2009) 20In Mulching/Rear Bagging Lawn Mower
- 10662 (280000001–280999999)(2008) Insight Lawn Mower

This answer is automatically generated

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10640c1064110641c1064210642c10643c ... Show all

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