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Onan
Lawn & Garden Engine

Model # BG-MS3272A Official Onan engine

Here are the diagrams and repair parts for Official Onan BG-MS3272A 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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Showing 10 of 263 parts  |
Lock 5/16" - Code 21bj, 21bk, 21bw 850-0045
Lock 5/16" - code 21bj, 21bk, 21bw

Part #850-0045

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

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 | 
17% OFF Phone Price : $30.09
In Stock
Washer 526-0113
#28

Governor, starter charging alternator & blower housing group diagram

Washer

Part #526-0113

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

Flat Washer 526-0122
#29

Cylinder block group diagram

Flat washer

Part #526-0122

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

Flat Washer 526-0018
#5

Cylinder block group diagram

Flat washer

Part #526-0018

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

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
Ring 113-0186-30
#15E

Crankshaft, flywheel, camshaft and piston group diagram

Ring

Part #113-0186-30

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

Flat Washer 526-0017
#17

Crankshaft, flywheel, camshaft and piston group diagram

Flat washer

Part #526-0017

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

Plug 517-0048
#9

Cylinder block group diagram

Plug

Part #517-0048

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

Lock Flywheel Screw 821-0010
Lock flywheel screw

Part #821-0010

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

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Repair guides for electric water heaters

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How to replace a water heater element

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Repair difficulty
Time required
 30 minutes or less
How to replace an electric water heater thermostat

How to replace an electric water heater thermostat

If the water temperature fluctuates or you don't get enough hot water, follow these instructions to replace your water h…

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Repair difficulty
Time required
 30 minutes or less
How to replace a water heater temperature and pressure (T&P) relief valve

How to replace a water heater temperature and pressure (T&P) relief valve

Replace a broken temperature/pressure (T&P) relief valve on an electric water heater using these instructions.…

Read more
Repair difficulty
Time required
 15 minutes or less

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