Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
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.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

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

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
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
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
Stud 520-0820
#41

Cylinder block diagram

Stud

Part #520-0820

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

Lawn & Garden Equipment Engine Screw 813-0108
#17

Governor, starter charging alternator & blower housing grp. diagram

Lawn & garden equipment engine screw

Part #813-0108

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

Bushing 150-1269
#15

Governor, starter charging alternator & blower housing grp. diagram

Bushing

Part #150-1269

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

Ignition Base 160-1219
#11

Ignition group diagram

Ignition base

Part #160-1219

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

Valve Insert 110-1824-05
#28C

Cylinder block diagram

Valve insert

Part #110-1824-05

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

Lawn & Garden Equipment Engine Breather Tube 140-1169
#1

Fuel system diagram

Lawn & garden equipment engine breather tube

Part #140-1169

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

Lawn & Garden Equipment Engine Starter Assembly 191-0933
Lawn & garden equipment engine starter assembly

Part #191-0933

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

Lock 110-0639
#32

Cylinder block diagram

Lock

Part #110-0639

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

Repair guides for side-by-side refrigerators

How to replace an ice dispenser motor in a side-by-side refrigerator

How to replace an ice dispenser motor in a side-by-side refrigerator

If your side-by-side refrigerator isn’t churning out ice, replacing the motor could fix the problem. These steps explain…

Read more
Repair difficulty
Time required
 45 minutes or less
How to replace a defrost heater in a side-by-side refrigerator

How to replace a defrost heater in a side-by-side refrigerator

If frost is building up in the freezer of your side-by-side refrigerator, the defrost heater could be faulty. Follow the…

Read more
Repair difficulty
Time required
 45 minutes or less
How to replace an evaporator fan motor in a side-by-side refrigerator

How to replace an evaporator fan motor in a side-by-side refrigerator

If your refrigerator isn't as cold as it should be, it could be that the evaporator fan motor isn't circulating air. Thi…

Read more
Repair difficulty
Time required
 60 minutes or less

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

View all
Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Read more
What are the main components of a lawn mower?

What are the main components of a lawn mower?

Learn about the main parts of a lawn mower and when to replace parts.…

Read more

Parts & More