Onan
Lawn & Garden Engine

Model # 6CCK-331E/1887E Official Onan gas engine & generator

Here are the diagrams and repair parts for Official Onan 6CCK-331E-1887E gas engine & generator, 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 321 parts  |

Washer, Camshaft Gear Thrust 105A4
#7

Camshaft group diagram

Washer, camshaft gear thrust

Part #105A4

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

Screw, Hex Head Cap - Hardened - 5/16-18 X 1-3/4 - Cylinder Head 114A22

#NI

All parts diagram

Screw, hex head cap - hardened - 5/16-18 x 1-3/4 - cylinder head

Part #114A22

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

Rod, Connecting - Specify: Standard Or .020" Undersize 114C98
#6

Connecting rod & piston group diagram

Rod, connecting - specify: standard or .020" undersize

Part #114C98

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

Needle, Idle Adjusting (contained In Repair Kit #142k371 And #142k387.) 142-40
#14

Carburetor parts group diagram

Needle, idle adjusting (contained in repair kit #142k371 and #142k387.)

Part #142-40

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

Ring, Camshaft Center Pin Snap 150A78
#1

Camshaft group diagram

Ring, camshaft center pin snap

Part #150A78

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

Lever, Idle Stop 145A8
#13

Carburetor parts group diagram

Lever, idle stop

Part #145A8

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

Cushion Assembly, Unit Mounting - Includes Cushions, Spacer Bushing And Hardware 402A145
#44

Cylinder block, oil base & gear cover group diagram

Cushion assembly, unit mounting - includes cushions, spacer bushing and hardware

Part #402A145

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

Joint, Governor Link Ball (replaces #150a300) 150A639
#6

Governor & throttle group diagram

Joint, governor link ball (replaces #150a300)

Part #150A639

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

Nozzle Assembly 142-285
#11

Carburetor parts group diagram

Nozzle assembly

Part #142-285

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

Nut, Governor Adjusting Stud (d) 870-52
#29

Governor & throttle group diagram

Nut, governor adjusting stud (d)

Part #870-52

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

Symptoms for electric water heaters

Main causes: excessive tank sediment, high voltage supply…

Main causes: thermostats need adjustment, bad heating elements, faulty thermostats, tank sediment build-up, broken dip t…

Repair guides for electric water heaters

How to replace a water heater element

How to replace a water heater element

If your water heater runs out of hot water quickly and one of the two heating elements has failed, replace the element f…

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…

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.…

Repair difficulty
Time required
 15 minutes or less

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

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.…

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.…