Checking spark plug, Adjusting carburetor, Replacing fuel filter – John Deere Tractor 100 Series OMG X23532 J0 User Manual

Page 32: Service engine

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Service Engine - 31

SERVICE ENGINE

MX39589

2. Inspect filter (A) for dirt and damage, wash or replace if required.

a.Remove cover (B) and remove emission filter (A) from under rear of
fenderdeck.

b.Wash foam filter in a solution of warm water and liquid detergent. Do
not use oil.

c.Rinse filter thoroughly. Squeeze out excess water in a dry cloth until
filter is completely dry.

If foam filter cannot be cleaned properly or is damaged, replace with a
new filter.

d.Install foam air filter and secure with cover.

Checking Spark Plug

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Let engine cool.

3. Lift hood.

MX16567

Picture Note: Twin cylinder engine shown.

4. Disconnect spark plug wire(s) (A), one on each side on V-twin engines.

5. Remove spark plug(s).

6. Clean spark plug carefully with a wire brush.

7. Inspect spark plug for:

• Cracked porcelain.

• Pitted or damaged electrodes.

• Other wear or damage.

8. Replace spark plug as necessary.

M85200

9. Check plug gap (B) with a wire feeler gauge. To change gap, move the
outer electrode.

• Gap must be 0.76 mm (0.030 in.).

10. Install and tighten spark plugs to 20 N•m (15 lb-ft).

11. Connect spark plug wire(s) and lower hood.

Adjusting Carburetor

NOTE: Carburetor is calibrated by the engine manufacturer and is
not adjustable.

If engine is operated at altitudes above 1829 m (6,000 ft), some
carburetors may require a special high altitude main jet. See your
authorized dealer.

If engine is hard to start or runs rough, check the TROUBLESHOOTING
section of this manual.

Possible engine surging will occur at high throttle with transmission in N
neutral and mower engagement lever disengaged. This is a normal
condition due to the emission control system.

After performing the checks in the troubleshooting section and your engine
is still not performing correctly, contact your authorized dealer.

Replacing Fuel Filter

NOTE: Change filter when fuel is low.

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Let engine cool.

3. Lift hood.

4. Handle fuel safely. (See Handling Fuel Safely in the SAFETY section.)

5. Put a drain pan under fuel filter.

B

A

A

B

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