Husqvarna 521SSR, 521SSE manual To Adjust the Carburetor, To Adjust or Replace the Spark Plug

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MAINTENANCE

TO ADJUST THE CARBURETOR

The carburetor is not adjustable. Engine performance should not be affected at altitudes up to 7,000 feet. For operation at higher elevations, contact your nearest autho- rized service center.

IMPORTANT: Never tamper with the engine governor, which is factory set for proper engine speed. Over−speed- ing the engine above the factory high speed setting can be dangerous. If the engine−governed high speed needs an adjustment, contact an authorized service center. They have the proper equipment and experience to make any necessary adjustments.

TO ADJUST OR REPLACE THE SPARK PLUG

THIS SPARK IGNITION SYSTEM COMPLIES WITH CANADIAN ICES-002.

Check the spark plug every twenty−five (25) hours. Re- place the spark plug if the electrodes are pitted or burned or if the porcelain is cracked.

The spark plug is housed in the engine compartment under the top cover and cannot be seen under normal conditions.

WARNING: STOP the engine. Wait for it to cool before removal of spark plug.

CAUTION: DO NOT clean the plug with abrasives.

1.Remove the fuel cap (see Figure 23).

2.Remove the screws from the shroud. Remove the shroud. Install the fuel cap.

3.Disconnect the spark plug wire (see Figure 24).

4.Clean the area around the spark plug base to prevent dirt from entering the engine when the spark plug is re- moved.

5.Remove the spark plug.

6.Check the spark plug. If the spark plug is cracked, fouled or dirty, it must be replaced .

7.Set the gap between the electrodes of the new spark plug at 0.030 inch (Figure 25).

8.Install the spark plug in the cylinder head and firmly tight- en. Recommended torque is 18 to 20 foot pounds. Attach the spark plug wire.

9.Remove the fuel cap and install the shroud (see Figure 23).

10.Install the fuel cap.

1740274

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Fuel Cap

Shroud

Figure 23

Spark Plug

Wire

Spark

Plug

Figure 24

.030” (0.76 mm) Gap

Figure 25

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Contents 1740274 Operator’s ManualFor Your Records IntroductionRules for Safe Operation Operating Symbols and their meaningsTraining Children Table of Contents Identifying Your Snowthrower Safety DecalsLimited Warranty OWNER’S Information Warranty StatementHUSQVARNA’S Obligations Under the Warranty Procedure to Obtain Warranty Consideration Items not Covered by this WarrantyExceptions and Limitations Customer ResponsibilitiesParts Bags Contents AssemblyTools Required for Assembly HOW to Remove the Snow Thrower from the CartonHOW to Install the Chute HOW to Assemble the HandleChecklist Know Your Snowthrower OperationEngine and Snow Thrower Operating Controls HOW to Control Snow Discharge HOW to Stop the SnowthrowerHOW to Throw Snow HOW to Move ForwardFuel Mixture Chart mixture HOW to MIX the Fuel MixtureBefore Starting the Engine HOW to Start the Engine HOW to Stop the EngineHOW to Start a Cold Engine Switch boxSnow Throwing Tips HOW to Clear a Clogged Discharge ChuteDRY and Average Snow WET Packed SnowService Recommendations Service RecommendationsAfter Each USE LubricationHOW to Lubricate the Idler ARM HOW to Adjust the Belt Tension MaintenanceHOW to Replace the Auger Belt HOW to Free the Auger Cable HOW to Replace the Scraper BladeHOW to Adjust the Auger Control Cable HOW to Adjust the Chute CrankIt cannot make contact with the spark plug HOW to Replace the Drive Belt HOW to Replace the Auger To Adjust or Replace the Spark Plug To Adjust the CarburetorThis Spark Ignition System Complies with Canadian ICES-002 OFF Season Storage StorageRemoving the Snowthrower from Storage Problem Look for Remedy Trouble Shooting Chart