Briggs & Stratton
Lawn & Garden Engine

Model # 40S877-0021-G1 Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 40S877-0021-G1 engine, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 219 parts  |

Lawn & Garden Equipment Engine Air Filter (replaces Bs-792105) 792105
#445

Blower housing/air cleaner diagram

Lawn & garden equipment engine air filter (replaces bs-792105)

Part #792105

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Lawn & Garden Equipment Engine Fuel Line (replaces 1734994sm, 327290ma, 691050, 7012638yp, 7032016yp, 7032956yp, 7041996yp, 7076272yp, 7077351yp, 791866, 798512, 809322, 809499) 791766
#187

Carburetor/fuel supply diagram

Lawn & garden equipment engine fuel line (replaces 1734994sm, 327290ma, 691050, 7012638yp, 7032016yp, 7032956yp, 7041996yp, 7076272yp, 7077351yp, 791866, 798512, 809322, 809499)

Part #791766

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Lawn & Garden Equipment Engine Governor Gear (replaces 698231) 793338
#219

Engine sump/oil pump/dipstick diagram

Lawn & garden equipment engine governor gear (replaces 698231)

Part #793338

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Lawn & Garden Equipment Engine Oil Seal (replaces 791892, Bs-795387) 795387
Lawn & garden equipment engine oil seal (replaces 791892, bs-795387)

Part #795387

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Lawn & Garden Equipment Engine Flywheel Key (replaces 222698, 690974, Bs-222698s) 222698S
#24

Cylinder/crankshaft/camshaft diagram

Lawn & garden equipment engine flywheel key (replaces 222698, 690974, bs-222698s)

Part #222698S

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Lawn & Garden Equipment Engine Spark Plug 792015
#337

Cylinder head/intake manifold diagram

Lawn & garden equipment engine spark plug

Part #792015

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Lawn & Garden Equipment Engine Ignition Coil (replaces 799651) 592846
#333

Flywheel/alternator/starter diagram

Lawn & garden equipment engine ignition coil (replaces 799651)

Part #592846

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Lawn & Garden Equipment Engine Intake Valve Push Rod (replaces 498746) 690982
#1026A

Cylinder head/intake manifold diagram

Lawn & garden equipment engine intake valve push rod (replaces 498746)

Part #690982

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Lawn & Garden Equipment Engine Exhaust Valve Push Rod (replaces 498745) 690981
#1026

Cylinder head/intake manifold diagram

Lawn & garden equipment engine exhaust valve push rod (replaces 498745)

Part #690981

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Lawn & Garden Equipment Engine Crankcase Gasket 594195
Lawn & garden equipment engine crankcase gasket

Part #594195

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Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings…

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure…

Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank…

Repair guides for gas line trimmers

These step-by-step repair guides will help you safely fix what’s broken on your grass line trimmer.

How to rebuild a line trimmer carburetor

How to rebuild a line trimmer carburetor

If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow…

Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer carburetor

How to replace a line trimmer carburetor

If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these …

Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer fuel line

How to replace a line trimmer fuel line

The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yours…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your lawn & garden engines

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