Model # B43M-GA016 Official Onan engine

Here are the diagrams and repair parts for Official Onan B43M-GA016 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

ALL PARTS

Showing 10 of 277 parts |

Fuel system diagram

Element

Part #140-1216

Replaced by #45-083-02-S

This item is not returnable

$25.09 |

17% OFF Phone Price : $30.09

In Stock

Qty

#39

Cylinder block diagram

Flat washer

Part #526-0018

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

#40

Cylinder block diagram

Flat washer

Part #526-0122

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

Lock 5/16" - Code 21bj, 21bk, 21bw 850-0045

#23

Fuel system diagram

Lock 5/16" - code 21bj, 21bk, 21bw

Part #850-0045

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

Gearcase diagram

Machine screw

Part #815-0046

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

#12

Ignition diagram

Nut

Part #166-0554

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

Cylinder block diagram

Shim

Part #104-0776

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

#12

Cylinder block diagram

Oil tube

Part #120-0735

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

#25

Cylinder block diagram

Valve cover

Part #110-2274

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

Lawn & Garden Equipment Engine Starter Pinion Gear 191-1156

#11

Starter motor diagram

Lawn & garden equipment engine starter pinion gear

Part #191-1156

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

Symptoms for upright freezers

Why does my freezer have a sheet of ice at the bottom?

Main causes: clogged or frozen defrost drain tube…

How to replace a freezer control panel

A freezer control panel that doesn’t show the temperature or respond when you press the buttons could be broken. This DI…

Repair difficulty

Time required

15 minutes or less

How to replace a freezer door switch

When the door switch fails, the freezer can’t detect that the door is closed. Follow the steps in this repair guide to r…

Repair difficulty

Time required

15 minutes or less

How to replace a freezer thermistor

When the thermistor can’t sense the freezer temperature, the freezer is colder or warmer than the set temperature. Follo…

Repair difficulty

Time required

45 minutes or less

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

View all

Top questions about Sears and Sears PartsDirect

What are the main components of a lawn mower?

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

Model # B43M-GA016 Official Onan engine

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for upright freezers

Why does my freezer have a sheet of ice at the bottom?

Repair guides for upright freezers

How to replace a freezer control panel

How to replace a freezer door switch

How to replace a freezer thermistor

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

Top questions about Sears and Sears PartsDirect

What are the main components of a lawn mower?

Parts & More

Stay Connected

Quick links

Let us help you

More resources