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Onan
Lawn & Garden Engine

Model # B43M-GA016 Official Onan engine

Here are the diagrams and repair parts for Official Onan B43M-GA016 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 277 parts  |
Lock 5/16" - Code 21bj, 21bk, 21bw 850-0045
#23

Fuel system diagram

Lock 5/16" - code 21bj, 21bk, 21bw

Part #850-0045

The manufacturer no longer makes this part, and there's no substitute part

Flat Washer 526-0122
#40

Cylinder block diagram

Flat washer

Part #526-0122

The manufacturer no longer makes this part, and there's no substitute part

Flat Washer 526-0018
#39

Cylinder block diagram

Flat washer

Part #526-0018

The manufacturer no longer makes this part, and there's no substitute part

Element 140-1216
#4

Fuel system diagram

Element

Part #140-1216

Replaced by #45-083-02-S

?
Manufacturer substitution
This part replaces 140-1216. Substitute parts can look different from the original.
This item is not returnable
$25.09 | 
17% OFF Phone Price : $30.09
In Stock
Ring 113-0189-10
#4C

Piston and rod diagram

Ring

Part #113-0189-10

The manufacturer no longer makes this part, and there's no substitute part

Valve 123-1175
#21

Cylinder block diagram

Valve

Part #123-1175

The manufacturer no longer makes this part, and there's no substitute part

Crankshaft Kit 104-1432
#9C

Crankshaft and fylwheel diagram

Crankshaft kit

Part #104-1432

The manufacturer no longer makes this part, and there's no substitute part

Solenoid 307-1031
#5

Starter motor diagram

Solenoid

Part #307-1031

The manufacturer no longer makes this part, and there's no substitute part

Cover Assembly 160-1285
#4

Breaker box diagram

Cover assembly

Part #160-1285

The manufacturer no longer makes this part, and there's no substitute part

Gasket 110-0068
#17

Cylinder block diagram

Gasket

Part #110-0068

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas walk-behind mowers

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Why does my lawn mower run rough?

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Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

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 15 minutes or less
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How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

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Repair difficulty
Time required
 45 minutes or less

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

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