John Deere

OMGC00133

Issue B1

21-Inch Commercial Walk-Behind Rotary Mower

JX85

PIN (010001-)

Introduction

Product Identification

Safety

Operating

Replacement Parts

Service Intervals

Service

Troubleshooting

Using Troubleshooting Chart

Checks

Storing Machine

Assembly

Specifications

Warranty

John Deere Quality Statement

Service Record

All Manuals Close Window

Troubleshooting


Using Troubleshooting Chart

If you are experiencing a problem that is not listed in this chart, see your John Deere dealer for service.

When you have checked all the possible causes listed and you are still experiencing the problem, see your John Deere dealer.

Checks

If

Check

Engine Will Not Start

· Fuel shutoff knob not in open position.

· Fuel tank is empty.

· Stale or dirty fuel.

· Disconnected or dirty spark plug.

· Throttle lever not in correct position.

Engine Starts Hard Or Loses Power

· Dirty fuel tank cap vents.

· Stale or dirty fuel.

· Dirty air cleaner foam or paper element.

· Disconnected or dirty spark plug.

Engine Runs Rough

· Carburetor needs to be cleaned.

· Disconnected or dirty spark plug.

· Throttle lever not in fast position.

· Dirty cooling fins.

· Dirty air cleaner paper or foam element.

Engine Overheats

· Dirty blower housing and cooling fins.

· Oil level too low.

Engine Vibrates Too Much

· Loose blade bolt.

· Blade dull or not balanced.

· Blade brake clutch bolt not tight.

Mower Pushes Or Pulls Hard

· Rear axle not lubricated.

· Traction clutch needs adjustment.

Mower Mows Unevenly

· Pushing mower too fast.

· Mowing too fast around corners and mowing pattern not changed.

· Wheel levers not adjusted in the same position.

· Blade dull or not balanced.

Discharge Chute Plugs

· Grass not dry.

· Cutting height not raised high enough.

· Dirty or full grass bag.

· Mowing too fast.

· Engine not in full throttle position.

Mower Jerks Or Will Not Self-Propel

· Traction belt broken.

· Traction clutch not adjusted.

· Dirty transmission.

· Gear shift lever not in gear.

Mulched Grass Appearance Is Poor: Clumps, Excessive Clippings, Rough Cut, etc:

· Grass not dry.

· Mowing too fast.

· Engine not in full throttle position.

· Blade dull or not balanced.

· Cutting height set too low.