Briggs & Stratton SPVH21675 Mower Blade Replacement, Standard Blade Wear Limit, Blade Sharpening

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!

WARNING

!

DO NOT attempt any maintenance, adjustments or service with engine and blade running. STOP engine and blade. Disconnect spark plug wire and secure away from spark plug. Engine and components are HOT. Avoid serious burns, allow sufficient time for all components to cool. Wear heavy leather gloves when handling or working around cutting blades. Blades are extremely sharp and can cause severe injury.

Mower Blade Replacement

Standard Blade Wear Limit

1.Inspect the blade (Figure 15) frequently for signs of excessive wear or damage:

(A)New blade

(B)Wear limit (notch starts)

(C)Dangerous condition! Do not use on the mower! Replace with a new blade.

A

B

C

Figure 15: Mower blade wear limits

!

WARNING

!

DO NOT use a cutting blade that shows signs of excessive wear or damage. Refer to the Section entitled “MOWER BLADE REPLACEMENT” for proper blade inspection and service procedures.

Blade Sharpening

1.Disconnect the spark plug wire and secure the end away from the plug.

2.Tilt the mower up on its rear wheels. Do not tilt the mower with the spark plug or carburetor down.

Important: Drain the fuel tank before tipping the mower. DO NOT tip the machine with the carburetor or spark plug down. Oil from the crankcase will saturate the air filter and cause the engine to be hard to start or not start at all. If contamination does occur, the air filter will have to be replaced.

3. Remove the blade (B, Figure 16).

Make sure that blade hub is seated between flanges

A

C

B

D

E

Figure 16: Removing the mower blade

4.Sharpen the blade on a grinding wheel at an angle of 22 to 28 degrees (B, Figure 17). DO NOT sharpen the blade beyond the original cutting edge (A).

5.Check blade for balance. If necessary, correct balance by grinding heavy end of blade.

6.Reinstall blade (B, Figure 16). Note the correct assembly order:

(A)Blade hub

(B)Blade

(C)Blade flange (facing up)

(D)Cone washer (concave side up)

(E)Capscrew

7.Check torque of blade retaining cap screw. Recommended torque should be 40 ft. lbs.

Do not sharpen beyond original cutting edge

22-280

B

End view of blade assembly

A

Figure 17: Sharpening the mower blade

Maintenance

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Contents Variable Speed Rear Discharge Walk Behind Mowers Date of Purchase Retailer Retailers Phone Number Equipment Product RegistrationEngine Table of Contents Slope Operation Protection for ChildrenPreparation From Previous ColumnOperation Maintenance and StorageFeatures and Controls Starting and Operation Pre-Start Check ListEngine and Blade Stopping Handle Height AdjustmentPropelling the Mower Installing the Discharge Deflector Cutting Height AdjustmentRecycling Operation Removing the Recycling Plug Installing the Grass BagService After First 5 Hours Maintenance IntroductionService Periodic Wheel Drive Components Storage ProcedureStandard Blade Wear Limit Mower Blade ReplacementBlade Sharpening Wheel drive controls Wheel Drive Control AdjustmentEngine Drive Belt Replacement Belt ServiceTo Install the Rear Cover Rear Cover Removal and InstallationTo Remove the Rear Cover Season Service ScheduleProbable Cause Corrective Action TroubleshootingDisclaimer of Warranty Year Limited WarrantyPage Slope Guide Page Page Part Number Product Specifications All Common Service Parts

SPVH21675, NSPVH21675 specifications

Briggs & Stratton NSPVH21675 and SPVH21675 are advanced vertical shaft engines designed to deliver reliable power for various outdoor equipment. Known for their durability and performance, these engines are ideal for lawn mowers, pressure washers, and other gardening tools, making them a popular choice among both residential and commercial users.

One of the standout features of the NSPVH21675 and SPVH21675 is their robust construction, which includes a cast-iron cylinder sleeve that enhances strength and prolongs engine life. This ensures that these engines can withstand the rigors of tough outdoor tasks while maintaining optimal performance. The design is further complemented by an aluminum crankcase that contributes to reduced weight without sacrificing durability.

Another key aspect of these engines is the innovative Direct Inject Technology. This advanced fuel management system allows for improved fuel efficiency by optimizing the air-fuel mixture delivered to the combustion chamber. As a result, users can expect enhanced power output while consuming less fuel, making these engines an eco-friendlier option.

The NSPVH21675 and SPVH21675 also feature a unique intake and exhaust system that maximizes airflow. This design not only enhances engine performance but also contributes to quieter operation. Operators will appreciate the reduced noise levels, making their time spent working outdoors more pleasant.

In terms of maintenance, Briggs & Stratton has engineered these models with user-friendly accessibility in mind. Routine checks and maintenance tasks are straightforward, allowing operators to spend more time on their projects rather than on upkeep. The engines are also equipped with an oil alert system, which helps prevent issues related to low oil levels, promoting longevity and reliability.

Both engines are designed with versatility in mind, able to power a range of equipment with different requirements. This adaptability is further exemplified by their electric start option, which simplifies the starting process and is particularly beneficial for larger machines that may require more effort to start.

Overall, the Briggs & Stratton NSPVH21675 and SPVH21675 engines represent a blend of power, efficiency, and ease of use. With their innovative technologies, robust construction, and user-friendly designs, they are a top choice for anyone in need of reliable outdoor power equipment solutions. Whether for personal use or professional landscaping, these engines provide the performance and durability to get the job done efficiently and effectively.
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