Checking spark plug, Service engine – John Deere la105 User Manual

Page 30

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Service Engine - 29

SERVICE ENGINE

MX25903

5. Loosen two knobs (A) and remove cover (B).

MX25904

6. Pull filter assembly from air cleaner base (C). Inspect the foam
precleaner (D) without removing it. If the foam precleaner is dirty:

a.Remove it from the paper filter carefully.

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

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

7. Inspect the paper filter element (E). If the paper filter element is
damaged or dirty, replace with new filter.

8. Clean air cleaner base very carefully, preventing any dirt from falling into
carburetor.

9. Install foam precleaner on paper filter element.

10. Install new filter assembly back onto air cleaner base.

11. Install air cleaner cover and tighten two knobs.

12. Lower hood.

Checking and Cleaning Emission Filter (If Equipped)

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

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:

IMPORTANT: Avoid damage! Dirt and debris can enter the engine
through a damaged filter element:

• Do not wash paper element.

• Do not attempt to clean paper element by tapping against
another object.

• Do not use pressurized air to clean element.

• Replace element only if it is very dirty, damaged or the seal is
cracked.

A

B

E

C

D

B

A

A

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