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Onan B48G-GA020/3858C gas engine Parts
Here are the diagrams and repair parts for Onan B48G-GA020/3858C gas engine, as well as links to manuals and error code tables, if available.
By Schematic
SELECT DIAGRAM
Browse Parts for B48G-GA020/3858C Gas Engine
Piston and rod diagram
Ring
Part #113-0189-05
The manufacturer no longer makes this part, and there's no substitute part
Fuel system diagram
Screw
Part #815-0480
The manufacturer no longer makes this part, and there's no substitute part
Piston and rod diagram
Connecting Rod
Part #114-0257-20
The manufacturer no longer makes this part, and there's no substitute part
Oil system diagram
Gasket
Part #122-0321
The manufacturer no longer makes this part, and there's no substitute part
Carburetor diagram
Shaft
Part #146-0281
The manufacturer no longer makes this part, and there's no substitute part
Fuel pump parts diagram
Diaphragm
Part #142-0555
The manufacturer no longer makes this part, and there's no substitute part
Cylinder block diagram
Valve Insert
Part #110-1824-10
The manufacturer no longer makes this part, and there's no substitute part
Cylinder block diagram
Gasket
Part #110-1921
The manufacturer no longer makes this part, and there's no substitute part
Lead Assembly
Part #336-2378
The manufacturer no longer makes this part, and there's no substitute part
Air housing diagram
Lifting
Part #403-1523
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for gas walk-behind mowers
Choose a symptom to see related walk-behind mower repairs.
Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…
Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…
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Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…
Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…
Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…
Repair guides for gas walk-behind mowers
These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.
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Repair time and Difficulty
60 minutes or less
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Learn how to replace the transmission on your lawn mower if it's locked up or won't drive the wheels.…
Repair time and Difficulty
60 minutes or less
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…
Repair time and Difficulty
45 minutes or less
Effective articles & videos to help repair your lawn & garden engines
Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
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