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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.
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Browse Parts for B48G-GA020/3858C Gas Engine
Piston and rod diagram
Ring
Part #113-0189-30
The manufacturer no longer makes this part, and there's no substitute part
Cylinder block diagram
Bearing
Part #101-0405
The manufacturer no longer makes this part, and there's no substitute part
Cylinder block diagram
Plug
Part #517-0120
The manufacturer no longer makes this part, and there's no substitute part
Flywheel alternator - 15 ampere diagram
Stator
Part #191-1256
The manufacturer no longer makes this part, and there's no substitute part
Ignition diagram
Cable
Part #167-1595
The manufacturer no longer makes this part, and there's no substitute part
Lawn & Garden Equipment Engine Breaker Point Plunger
Part #160-1151
The manufacturer no longer makes this part, and there's no substitute part
Lock Washer
Part #850-0040
The manufacturer no longer makes this part, and there's no substitute part
Pin
Part #516-0059
The manufacturer no longer makes this part, and there's no substitute part
Piston and rod diagram
Bolt
Part #114-0240
The manufacturer no longer makes this part, and there's no substitute part
Cylinder block diagram
Plate
Part #101-0551
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…
Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…
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.
How to replace a lawn mower front deck tray
Learn how to replace the front deck tray on your lawn mower if it's cracked or damaged.…
Repair time and Difficulty
60 minutes or less
How to replace a lawn mower transmission
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.…
Learn about the main parts of a lawn mower and when to replace parts.…
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