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Onan BF-MS3271E engine Parts
Here are the diagrams and repair parts for Onan BF-MS3271E engine, as well as links to manuals and error code tables, if available.
By Schematic
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Browse Parts for BF-MS3271E Engine
Fuel system group diagram
Carburetor
Part #142-0531
The manufacturer no longer makes this part, and there's no substitute part
Gear cover, oil base and oil pump group diagram
Pump
Part #120-0491
The manufacturer no longer makes this part, and there's no substitute part
Starter group diagram
Washer
Part #191-1038
The manufacturer no longer makes this part, and there's no substitute part
Gear cover, oil base and oil pump group diagram
Lawn & Garden Equipment Engine Crankshaft Oil Seal
Part #509-0040
The manufacturer no longer makes this part, and there's no substitute part
Carburetor parts group diagram
Cover
Part #142-0551
The manufacturer no longer makes this part, and there's no substitute part
Ignition group diagram
Lead
Part #167-1581
The manufacturer no longer makes this part, and there's no substitute part
Crankshaft, flywheel, camshaft and piston group diagram
Lawn & Garden Equipment Engine Ball Bearing
Part #510-0015
The manufacturer no longer makes this part, and there's no substitute part
Starter group diagram
Cap
Part #191-1037
The manufacturer no longer makes this part, and there's no substitute part
Cap Screw
Part #800-0034
The manufacturer no longer makes this part, and there's no substitute part
Crankshaft, flywheel, camshaft and piston group diagram
Crankshaft Gear
Part #104-0032
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for gas pressure washers
Choose a symptom to see related pressure washer repairs.
Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…
Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…
Things to do: tune up the engine, inject pump saver into the water pump when storing the pressure washer for the winter…
Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, ba…
Main causes: faulty unloader valve, bad pressure regulator…
Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…
Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…
Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…
Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…
Repair guides for gas pressure washers
These step-by-step repair guides will help you safely fix what’s broken on your pressure washer.
How to replace a pressure washer pump
The pump can be damaged by air in the inlet water supply or by chemicals that remain in the pump body after using the ch…
Repair time and Difficulty
15 minutes or less
How to install a pressure washer O-ring kit
O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps t…
Repair time and Difficulty
45 minutes or less
How to replace a pressure washer unloader valve
The unloader valve recirculates water to protect the pump from damage. If the unloader valve is defective, replace it us…
Repair time and Difficulty
15 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 pressure washer.
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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