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Onan
Lawn & Garden Engine

Model # BF-MS/3265F Official Onan engine

Here are the diagrams and repair parts for Official Onan BF-MS-3265F engine, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 303 parts  |
Element 140-1216
#13

Fuel system group 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 | 
19% OFF Phone Price : $31.09
In Stock
Pre-clner 140-1259
#20

Fuel system group diagram

Pre-clner

Part #140-1259

Replaced by #45-083-01-S

?
Manufacturer substitution
This part replaces 140-1259. Substitute parts can look different from the original.
This item is not returnable
$7.29 | 
12% OFF Phone Price : $8.29
In Stock
Bearing 101-0432-10
#33C

Cylinder block group (for model bg-ms/3344a only) diagram

Bearing

Part #101-0432-10

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

Brush 191-1041

#NI

All parts diagram

Brush

Part #191-1041

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

Valve Cover 110-2274
#6

Cylinder block group (for model bg-ms/3344a only) diagram

Valve cover

Part #110-2274

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

Carburetor Assembly 142-0568
#2

Fuel system group diagram

Carburetor assembly

Part #142-0568

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

Ring 113-0174-10
#16C

Crankshaft, flywheel, camshaft and piston group diagram

Ring

Part #113-0174-10

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

Cap Screw 800-0034
#6

Fuel system group diagram

Cap screw

Part #800-0034

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

Bearing 101-0450-30
#15E

Cylinder block group (for model bg-ms/3344a only) diagram

Bearing

Part #101-0450-30

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

Filter 123-0865
#40

Cylinder block group (for model bg-ms/3344a only) diagram

Filter

Part #123-0865

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.

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Why won't my pressure washer mix in the detergent?

Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…

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Why is smoke coming from the pressure washer's exhaust?

Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…

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Why won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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Why does my pressure washer's engine lose power?

Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…

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Why is the spray from my pressure washer weak?

Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…

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Why doesn't my pressure washer recoil starter work?

Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…

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Why does my pressure washer spray too hard?

Main causes: faulty unloader valve, bad pressure regulator…

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Why won't my pressure washer engine start?

Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…

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Why does water spray out of my pressure washer's pressure relief valve?

Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, ba…

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Repair guides for gas pressure washers

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How to install a pressure washer check valve kit

How to install a pressure washer check valve kit

Air in the inlet water supply can damage the check valves. If the pump won’t build up pressure due to damaged check valv…

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Repair difficulty
Time required
 120 minutes or less
How to install a pressure washer O-ring kit

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…

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Repair difficulty
Time required
 45 minutes or less
How to install a pressure washer chemical injection kit

How to install a pressure washer chemical injection kit

The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace t…

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Repair difficulty
Time required
 15 minutes or less

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

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