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Onan
Lawn & Garden Engine

Model # BG-MS3270A Official Onan engine

Here are the diagrams and repair parts for Official Onan BG-MS3270A 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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ALL PARTS
Showing 10 of 267 parts  |
Pre-clner 140-1259
#20

Fuel system 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
Flat Washer 526-0214
#28

Governor, starter charging alternator & blower housing grp. diagram

Flat washer

Part #526-0214

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

Element 140-1216
#13

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 | 
19% OFF Phone Price : $31.09
In Stock
Flat Washer 526-0018
#5

Cylinder block diagram

Flat washer

Part #526-0018

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

Screw 800-0545
#38A

Gear cover, oil base and oil pump group diagram

Screw

Part #800-0545

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

Screw 815-0290
#23

Governor, starter charging alternator & blower housing grp. diagram

Screw

Part #815-0290

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

Screw 815-0377
#19

Fuel system diagram

Screw

Part #815-0377

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

Screw 800-0540
#39A

Cylinder block diagram

Screw

Part #800-0540

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

Plug 505-0056
#14

Gear cover, oil base and oil pump group diagram

Plug

Part #505-0056

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

Symptoms for gas cooktops

Why won't my cooktop's gas burners ignite or spark?

Main causes: burner igniter switch failure, bad spark module, dirty or damaged spark electrode, wiring failure, lack of …

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Why isn't my cooktop's gas burner heating properly?

Main causes: gas supply problem, faulty pressure regulator, clogs in burner or orifice, burner valve failure…

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Why do my cooktop's spark igniters keep clicking?

Main causes: stuck burner igniter switch, wet igniter switch contacts, faulty spark module…

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Repair guides for gas cooktops

How to replace a spark igniter switch on a gas cooktop

How to replace a spark igniter switch on a gas cooktop

Follow these step-by-step instructions to fix the surface burner ignition system on your gas cooktop by replacing the sp…

Read more
Repair difficulty
Time required
 45 minutes or less
How to replace a spark module on a gas cooktop

How to replace a spark module on a gas cooktop

No flame on your gas cooktop? Installing a new spark module could be the fix you need.…

Read more
Repair difficulty
Time required
 30 minutes or less

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What are the main components of a lawn mower?

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