Service Bulletin B1730083-07A

Page 1 of 1 Revision History RevA 28-Aug-2017 Issued bulletin

SERVICE BULLETIN

To: All Dealers and Customers Bulletin Number: B17-30083-07A Date: 28-Aug-2017 Brand: Husqvarna Product: Walk mowers with Honda GCV-160 engines Dates Produced: 01-Dec-2012 through 31-May-2017 Affected Market(s): North America, Latin America and Mexico

Description/Background: Issue: Honda engine chugs and stalls after start-up.

This bulletin is to inform our dealers and customers of Honda’s corrective action for units produced with the Honda GCV-160 engine within the specified serial number range below.

Action Required: Follow Honda service bulletin SB-53, dated November-2016. See attached copy for your reference.

** IMPORTANT ** A Husqvarna dealer that is an authorized Honda servicing dealer may perform this work as an authorized Honda servicing dealer. A Husqvarna dealer that is not an authorized Honda servicing dealer must refer the servicing work to an authorized Honda servicing dealer.

NOTE: Unauthorized modifications to the emission control system is considered Tampering and subject to penalties as defined in the US Code of Federal Regulations, Title 40: Protection of Environment

Warranty Reporting: File warranty claim through Honda warranty system as described in attached bulletin.

Affected Serial Number Range(s): 120112MXXXXXX to 053117MXXXXXX

Models Affected:

If you have questions, contact us. Husqvarna Dealers call 1-800-448-7543 All other customers call 1-800-487-5951

Model Brand

96143013000 HUSQVARNA

96145000905 HUSQVARNA

96145000906 HUSQVARNA

96145002303 HUSQVARNA

96145002402 HUSQVARNA

96145003200 HUSQVARNA

Model Brand

96133000500 HUSQVARNA

96133001905 HUSQVARNA

96133003000 HUSQVARNA

96133003100 HUSQVARNA

96143012600 HUSQVARNA

96143012800 HUSQVARNA

© 2016 American Honda Motor Co., Inc.— All Rights Reserved Page 1 of 4First Issue Date: November 2016 PTB54757.TE100.2016.11

CONSUMER INFORMATION: The information in this service bulletin is intended for use only by skilled technicians who have theproper tools, equipment, and training to correctly and safely service and repair your Honda engine. These procedures should not be attemptedby “do-it-yourselfers,” and you should not assume that this bulletin applies to your engine, or that your engine has the condition described. Todetermine whether this information applies, contact an authorized Honda Engine dealer.

OVERHEAD-VALVE ENGINE #53

NOVEMBER 2016

This bulletin applies only to units within the affected serial number range that have the described symptom.

GCV160LA0S3BENGINE CHUGS AND STALLS AFTER START-UP

SYMPTOM

When the engine is initially started and the choke is fully closed, the engine chugs at low speed for 10 seconds or longer before the engine speed increases. After the engine speed increases, the engine runs smoothly and the auto-choke opens normally as it warms up.

However, in some cases, the engine speed never increases and the engine simply floods, then stalls, and cannot be restarted until it is allowed to rest for a few minutes.

The symptom is more likely to occur at very warm ambient temperatures and/or higher elevations.

Using the incorrect type of gasoline (contaminated, old, leaded, etc.) can also contribute to this symptom. Use only fresh, regular unleaded gasoline (86 octane or higher) containing no more than 10% ethanol or 5% methanol by volume. Engine damage due to incorrect fuel usage is not covered under the Distributor’s Limited Warranty.

AFFECTED UNITS

*The affected model is a flywheel brake, auto-choke, recoil start lawn mower engine.

CAUSE

In some operating conditions, high engine speed and governor spring pre-load delay the choke opening response, which prevents the choke from initially opening far enough for the engine speed to increase.

CORRECTIVE ACTION

A longer governor spring is available, which enhances choke operation. For any affected unit with the described symptom, replace the governor spring and readjust the engine speed using the “PROCEDURE” on page 2. Before replacing the governor spring, read the entire procedure to become familiar with all of the steps.

If the engine is being operated above 5,000 feet (1,500 m), the carburetor should be re-jetted following service bulletin General Information #19. Re-jetting is not covered under the Distributor’s Limited Warranty.

To ensure easy starting, remind your customers to allow the engine to run for at least 3 minutes after starting a cold engine before stopping the engine. This will ensure the choke fully opens.

MODEL SERIAL NUMBER RANGE

GCV160LA0S3B* GJARA-3584241 ~ 7362785

Page 2 of 4 © 2016 American Honda Motor Co., Inc.— All Rights ReservedPTB54757.TE100.2016.11

OVERHEAD-VALVE ENGINE #53

NOVEMBER 2016

PROCEDURE

1. With the engine off, remove the existing governor spring.

2. Install the new spring.

Make sure the hooks are facing inward as shown.

3. Remove and inspect the spark plug. It is likely carbon fouled due to the chugging condition. Replace the spark plug if necessary. Tighten the spark plug to 15 lbf-ft (20 N•m).

4. Start the engine and allow it to run for at least 3 minutes until the choke fully opens.

5. Adjust the engine speed to 2,950 ~ 3,050 rpm by slightly twisting the governor spring tab.

• Clockwise increases spring tension and engine speed.

• Counterclockwise decreases spring tension and engine speed.

Make sure the engine speed is between 2,950 and 3,050 rpm or the symptom may recur.

Original Spring New Spring

Part # 16561-Z0L-000 16561-Z0L-900

# of Coils 21 13

Overall Length

69 mm 71 mm

DANGERThe blades are rotating during this procedure.

The blades are sharp and spin at a high speed. If you come in contact with a spinning blade, it will cut you severely and can amputate fingers and toes.

Keep your hands and feet away from the mower deck while the engine is running.

GOVERNOR SPRING

ORIGINAL SPRING

NEW SPRING

SPARK PLUG

SPARK PLUG CAP

GOVERNOR SPRING TAB

DECREASES

INCREASES

© 2016 American Honda Motor Co., Inc.— All Rights Reserved Page 3 of 4PTB54757.TE100.2016.11

OVERHEAD-VALVE ENGINE #53

NOVEMBER 2016

PARTS INFORMATION

Order parts using your normal parts ordering procedures.

WARRANTY INFORMATION

Duration

In WarrantyThe normal warranty applies.

Out of WarrantyAny repair performed after warranty expiration may be eligible for goodwill consideration. Contact Techline or your District Service Manager. You must request consideration and receive a decision before starting work.

VIN Information

Processing

Service bulletin warranty claim submission requirements apply. After completing the Service Bulletin repair procedure, submit one warranty claim per unit with the following information:

PART NUMBER QTY DESCRIPTION

16561-Z0L-900 1 Spring, Governor

98079-55846 1 Spark Plug (BPR5ES)

MODEL SERIAL NUMBER RANGE

GCV160LA0S3B GJARA-3584241 ~ 7362785

Dealers• Select Service Bulletin claim type.

• Enter VIN information.

• From the Service Bulletin drop-down menu, select OHV53 (Overhead-Valve Engine Service Bulletin #53) for the appropriate model and repair.

All others:

• Defect code: 093

• Labor Operation Number: 1161C5

• Flat Rate Time: 0.2 hr

• Failed Part: 16561-Z0L-000