Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
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-MS2980A Official Onan engine

Here are the diagrams and repair parts for Official Onan BG-MS2980A 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  |
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
Gear Cam 105-0332
#6

Crankshaft, flyweel, camshaft and piston group diagram

Gear cam

Part #105-0332

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

Screw 191-1048
#7

Starter parts group diagram

Screw

Part #191-1048

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

Bearing 115-0006-05
#24C

Cylinder block group diagram

Bearing

Part #115-0006-05

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

Crankshaft Gear 104-0032
#7

Crankshaft, flyweel, camshaft and piston group diagram

Crankshaft gear

Part #104-0032

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

Manifold 154-1468
#4

Fuel system group diagram

Manifold

Part #154-1468

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

Tube 149-1299
#38

Cylinder block group diagram

Tube

Part #149-1299

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

Piston Pin 112-0143-40
#11F

Crankshaft, flyweel, camshaft and piston group diagram

Piston pin

Part #112-0143-40

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

Choke Shaft 142-0536
#5

Carburetor group diagram

Choke shaft

Part #142-0536

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

Symptoms for gas leaf blowers

Choose a symptom to see related leaf blower repairs.

View all

What should I do if my leaf blower leaks gas?

Main causes: cracked fuel lines, leaky carburetor seals, damaged fuel tank cap, cracked fuel tank…

Read more

Why does a leaf blower vibrate excessively?

Main causes: damaged fan blade, engine needs a tune up, dirty carburetor…

Read more

Why does my leaf blower run roughly?

Main causes: stale fuel, dirty air filter, bad spark plug, cracked fuel lines, clogged carburetor…

Read more

What should I do if my leaf blower engine smokes?

Main causes: mixing too much 2-cycle oil with the gas, dirty air filter, clogged carburetor, engine needs tune up…

Read more

Why won't my leaf blower start?

Main causes: bad gas, clogged air filter, cracked fuel lines, clogged fuel filter, dirty carburetor, bad spark plug, wor…

Read more

Repair guides for gas leaf blowers

These step-by-step repair guides will help you safely fix what’s broken on your leaf blower.

View all
How to replace a leaf blower carburetor

How to replace a leaf blower carburetor

The carburetor could be the problem If the leaf blower engine won't start even though there's fuel in the tank. Follow t…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace leaf blower fuel lines

How to replace leaf blower fuel lines

Leaf blower fuel lines deteriorate with time and eventually can split or crack. You can remove and replace them yourself…

Read more
Repair difficulty
Time required
 60 minutes or less
How to rebuild a leaf blower carburetor

How to rebuild a leaf blower carburetor

If the leaf blower engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow …

Read more
Repair difficulty
Time required
 60 minutes or less

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

Use the advice and tips in these articles to get the most out of your leaf blower.

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