Troubleshooting

Exmark designed and built your lawn mower for trouble-free operation. Check the following components and items carefully, and refer to Maintenance on page 14 for more information. If a problem continues, contact an Authorized Service Dealer.

Problem

 

Possible Causes

 

Corrective Action

 

 

 

 

 

Engine does not start

1.

The fuel tank is empty or the

1.

Drain and/or fill the fuel tank

 

 

fuel system contains stale fuel.

 

with fresh gasoline. If the

 

 

 

 

problem persists, contact an

 

 

 

 

Authorized Service Dealer.

 

2.

The throttle lever is not in the

2.

Move the throttle lever to the

 

 

Choke position.

 

Choke position.

 

3.

The wire is not connected to

3.

Connect the wire to the spark

 

 

the spark plug.

 

plug.

 

4.

The spark plug is pitted, fouled,

4.

Check the spark plug and

 

 

or the gap is incorrect.

 

adjust the gap if necessary.

 

 

 

 

Replace the spark plug if it is

 

 

 

 

pitted, fouled, or cracked.

 

 

 

 

 

Engine starts hard or loses power

1.

The fuel tank contains stale

1.

Drain and fill the fuel tank with

 

 

fuel.

 

fresh gasoline.

 

2.

The fuel cap vent hole is

2.

Clean the fuel cap vent hole or

 

 

plugged.

 

replace the fuel cap.

 

3.

The air cleaner elements are

3.

Service the air cleaner

 

 

dirty and are restricting the air

 

elements.

 

 

flow.

 

 

 

4.

The underside of the lawn

4.

Clean under the lawn mower

 

 

mower housing contains

 

housing.

 

 

clippings and debris.

 

 

 

5.

The spark plug is pitted, fouled,

5.

Check the spark plug and

 

 

or the gap is incorrect.

 

adjust the gap if necessary.

 

 

 

 

Replace the spark plug if it is

 

 

 

 

pitted, fouled, or cracked.

 

6.

The engine oil level is low or

6.

Check the engine oil. Change

 

 

the oil is dirty.

 

the oil if it is dirty or add oil if it

 

 

 

 

is low.

 

 

 

 

 

Engine runs rough

1.

The wire is not connected to

1.

Connect the wire to the spark

 

 

the spark plug.

 

plug.

 

2.

The spark plug is pitted, fouled,

2.

Check the spark plug and

 

 

or the gap is incorrect.

 

adjust the gap if necessary.

 

 

 

 

Replace the spark plug if it is

 

 

 

 

pitted, fouled, or cracked.

 

3.

The throttle lever is not in the

3.

Move the throttle lever to the

 

 

Fast position.

 

Fast position.

 

4.

The air cleaner elements are

4.

Service the air cleaner

 

 

dirty and are restricting the air

 

elements.

 

 

flow.

 

 

 

 

 

 

 

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Exmark Metro 21 manual Troubleshooting, Problem Possible Causes Corrective Action