Briggs & Stratton 21A900 676 393761, 757, 843 697158, 758, Note −−−−−− 847 790442, 676A 396903

Page 16

21A900

REF.

PART

 

REF.

PART

 

REF.

PART

 

NO.

NO.

DESCRIPTION

NO.

NO.

DESCRIPTION

NO.

NO.

DESCRIPTION

676

393761

Deflector−Muffler

757

697607

Link−Counterweight

843

697158

Sleeve−Lever

 

 

(Side Out)

758

697391

Counterweight

 

 

Used on Type No(s).

 

 

Used on Type No(s).

 

 

(Used After Code Date

 

 

0139, 0140, 0142,

 

 

0101, 0105, 0115,

 

 

05100200).

 

 

0166.

 

 

0117, 0119, 0120,

 

 

−−−−−− Note −−−−−−

847

790442

Dipstick/Tube

 

 

0121, 0122, 0134,

 

 

795940 Counterweight

 

 

Assembly

 

 

0136, 0137, 0138,

 

 

 

 

−−−−−− Note −−−−−−

 

 

 

 

(Used Before Code

 

 

 

 

0139, 0140, 0141,

 

 

 

 

790443 Dipstick/Tube

 

 

 

 

Date 05100300).

 

 

 

 

0142, 0144, 0145,

 

 

 

 

Assembly

 

 

 

 

Must Use Kit 795940,

 

 

 

 

0147, 0149, 0150,

 

 

 

 

Used on Type No(s).

 

 

 

 

Includes Sump And

 

 

 

 

0151, 0153, 0154,

 

 

 

 

0115, 0121, 0122,

 

 

 

 

Counterweight.

 

 

 

 

0157, 0159, 0161,

 

 

 

 

0133, 0137, 0139,

 

 

 

 

795957 Counterweight

 

 

 

 

0162, 0166, 0168,

 

 

 

 

0140, 0141, 0142,

 

 

 

 

(Used Before Code

 

 

 

 

0172, 0173, 0176,

 

 

 

 

0143, 0144, 0145,

 

 

0179, 0180, 0184,

 

 

Date 05100300).

 

 

0147, 0149, 0150,

 

 

0185, 0186, 0187,

 

 

Used on Type No(s).

 

 

0151, 0153, 0154,

 

 

0188, 0191, 0192,

 

 

0101, 0105, 0115,

 

 

0157, 0159, 0161,

 

 

0195, 0198, 0199.

 

 

0119, 0121, 0122,

 

 

0162, 0164, 0165,

676A

396903

Deflector−Muffler

 

 

0129, 0156, 0157,

 

 

0166, 0170, 0173,

 

 

(Side Out)

 

 

0165, 0172, 0173,

 

 

0178, 0179, 0185,

 

 

Used on Type No(s).

 

 

0176, 0178, 0179,

 

 

0187, 0188, 0189,

 

 

0178.

 

 

0180, 0186, 0187,

 

 

0191, 0197, 0199.

677

690661

Screw

 

 

850

100100

Sealant−Liquid

 

 

0188, 0189, 0190,

 

 

(Muffler Deflector)

 

 

 

 

(Rocker Cover Gasket

 

 

 

 

0191, 0192, 0195,

 

 

687

697175

Slide−Control

 

 

 

 

and Breather Gasket)

 

 

0197, 0198, 0199.

 

 

 

 

Used on Type No(s).

 

 

 

 

(Used After Code Date

 

 

 

 

Must Use Kit 795957,

 

 

 

 

0139, 0140, 0142,

 

 

 

 

07071800).

 

 

 

 

Includes Sump And

 

 

 

 

0166.

 

 

851

692424

Terminal−Spark Plug

 

 

 

 

Counterweight.

688

690395

Cap−Friction

 

 

864

697346

Adapter−Muffler

759

697392

Pin−Counterweight

 

 

Used on Type No(s).

868 KΔ690968

Seal−Valve

 

 

783

693713

Gear−Pinion

 

 

0139, 0140, 0142,

877

393456

Wire/Connector−

 

 

0166.

789

698329

Harness−Wiring

 

 

Alternator

689

691855

Spring−Friction

789A

790544

Harness−Wiring

 

 

(Dual Circuit)

689A

690529

Spring−Friction

797

693167

Nut

877A

393814

Wire/Connector−

 

 

Used on Type No(s).

 

 

(Brush Retainer)

 

 

Alternator

 

 

0139, 0140, 0142,

801

691283

Cap−Drive

 

 

(DC Only)

 

 

0166.

802

691286

Cap−End

877B

393537

Wire/Connector−

691

K692407

Seal−Governor Shaft

803

 

Housing−Starter

 

 

Alternator

692

691301

Spring−Detent

 

 

(Not Serviced

 

 

(5 To 9 Amp

697

690372

Screw

 

 

Separately, Order

 

 

Regulated)

 

 

(Drive Cap)

 

 

877C

399916

Wire/Connector−

 

 

 

 

Starter Motor 693551)

705

790561

Nut

 

 

 

 

Alternator

823

698941

Screw

 

 

 

 

(Fuel Tank)

 

 

(10 To 16 Amp

 

 

 

 

(Muffler Adapter)

 

 

718

690959

Pin−Locating

 

 

 

 

Regulated)

830

691095

Stud−Rocker Arm

 

 

729

691335

Clip−Wire

 

 

 

832

790293

Guard−Muffler

 

 

 

 

 

(Wire Retainer)

 

 

 

 

 

 

 

Used on Type No(s).

 

 

 

729A

691224

Clip−Wire

 

 

 

 

 

 

 

0147, 0149, 0150,

 

 

 

 

 

(Starter Motor)

 

 

 

 

 

 

 

 

 

0151, 0184.

 

 

 

729B

694123

Clip−Wire

 

 

 

 

 

741

697128

Gear−Timing

836

690367

Screw−Muffler Guard

 

 

 

750

790832

Screw

842

K691031

Seal−O Ring

 

 

 

 

 

(Oil Pump Cover)

 

 

(Dipstick Tube)

 

 

 

 

 

 

 

 

 

 

 

 

KIncluded in Engine Gasket Set−Ref. No. 358.

DIncluded in Carburetor Overhaul Kit−Ref. No. 121 or 121A.

zIncluded in Carburetor Gasket Set−Ref. No. 977 or 977A. Δ Included in Valve Gasket Set−Ref. No. 1095.

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5069−16

Assemblies include all parts shown in frames.

02/07/2008

16

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Image 16
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Contents Illustrated Parts List With warning labels affixed 847 Valve Gasket SET Walbro See textNikki Emissions Label 1070 1005B 37A 187 187A 601 240 For additional information 697377 23A 693555399265 K391086S691003 121 790031697352 78A 690364137Dz281165S 192216 691840 202265 691024 311 497608387A 808656 267 794904474C 696457 523 699908584 794682 524676 393761 757843 697158 758398661 968 6974201040 698368 6919561263 697124 1270 6971561264 697104 −−−−−− Note −−−−−− 1319 794467

21A900 specifications

Briggs & Stratton is a name synonymous with reliability and innovation in the small engine industry. Among its varied product lineup, the Briggs & Stratton 21A900 stands out for its performance and efficiency, making it an excellent choice for both homeowners and professionals.

The Briggs & Stratton 21A900 is a versatile engine specifically designed for lawn mowers and other outdoor power equipment. One of its hallmark features is its compact design, making it lightweight while still delivering robust performance. This makes it an ideal choice for residential lawn care, as well as for commercial landscaping operations.

One of the key technologies employed in the 21A900 is the Overhead Valve (OHV) design. This technology enhances engine efficiency by placing the valves in the cylinder head, allowing for better airflow and improved combustion. This results in increased power output and fuel efficiency, making it eco-friendlier compared to older engine designs.

In addition, the engine is equipped with a reliable starter mechanism, which enables easy starts even in cold conditions. The ReadyStart® system is a notable feature that eliminates the need for manual priming or choking, ensuring that users can get to work with minimal fuss.

The 21A900 also boasts a governor system designed to maintain engine speed under varying loads. This is particularly beneficial for lawn mowers, as it allows the engine to adjust power output automatically when encountering tougher grass or uneven terrain. As a result, users can enjoy consistent performance without constantly adjusting the throttle.

Durability is another significant characteristic of the 21A900. Briggs & Stratton engines are known for their rugged construction and the 21A900 is no exception. Built with high-quality materials, it promises long-lasting performance and reduced maintenance issues, which translates to lower total cost of ownership for users.

Maintenance is made easier with the inclusion of features such as a top-mounted oil fill and a convenient oil drain. This user-friendly design simplifies routine oil checks and changes, ensuring that the engine stays in top shape.

In summary, the Briggs & Stratton 21A900 engine combines advanced technologies, user-friendly features, and durable construction to deliver a powerful and efficient solution for outdoor power equipment. Whether used in a residential or commercial setting, the 21A900 ensures reliable performance for all lawn care needs. This engine exemplifies the commitment of Briggs & Stratton to quality and innovation, making it a trusted choice for users around the world.
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