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  |

Clip, End - Governor Link To Carburetor (b, C, D) 518-6
#9

Governor & throttle group diagram

Clip, end - governor link to carburetor (b, c, d)

Part #518-6

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

Nipple, Close - Brass Pipe - 1/8" - Filter Inlet 502-46
#21

Fuel system & exhaust group diagram

Nipple, close - brass pipe - 1/8" - filter inlet

Part #502-46

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

Sheave, Rope (a, B) 160B222
#5

Crankshaft & flywheel group diagram

Sheave, rope (a, b)

Part #160B222

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

Gasket, Oil Base Mounting (replaces #102b8) 102B158
#20

Cylinder block, oil base & gear cover group diagram

Gasket, oil base mounting (replaces #102b8)

Part #102B158

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

Tube, Breather - Less Valve - Includes Baffle (b, C, D) 123A620
#13C

Cylinder block, oil base & gear cover group diagram

Tube, breather - less valve - includes baffle (b, c, d)

Part #123A620

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

Armature Assembly - Includes Blower And Bearing (d) 201A1041

#NI

All parts diagram

Armature assembly - includes blower and bearing (d)

Part #201A1041

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

Bracket, Variable Speed Lever (contained In Control Assembly 152b85.) (b, C) 152B86
#12

Governor & throttle group diagram

Bracket, variable speed lever (contained in control assembly 152b85.) (b, c)

Part #152B86

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

Bracket, Micro Switch Mounting (b, C) 309B78
#16

Governor & throttle group diagram

Bracket, micro switch mounting (b, c)

Part #309B78

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

Screw, Valve Compartment Cover - 1/4"-20 X 2" 800-11

#NI

All parts diagram

Screw, valve compartment cover - 1/4"-20 x 2"

Part #800-11

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

Harness, Wiring - Micro Switch (d) 338B239
#27

Governor & throttle group diagram

Harness, wiring - micro switch (d)

Part #338B239

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

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Repair difficulty
Time required
 45 minutes or less

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

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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.…