Manual Honda Honda Engines GX120 Regular (page 8 of 43) (English)

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ENGLISH

SPARK PLUG

Recommended Spark Plugs:

AIR CLEANER

Inspection

Cleaning

SEALING

WASHER

SIDE ELECTRODE

CORRECT

HOLE

PLATE

PAPER FILTER ELEMENT

AIR CLEANER COVER

INCORRECT

0.70 0.80 mm

(0.028 0.031 in)

SPARK PLUG WRENCH

AIR CLEANER CASE

RETAINING CLIP

FOAM FILTER ELEMENT

CLOSED END

OPEN END

BPR4ES (NGK)

W14EPR-U (DENSO)

The recommended spark plug is the correct heat range for normal

engine operating temperatures.

An incorrect spark plug can cause engine damage.

For good performance, the spark plug must be properly gapped

and free of deposits.

Disconnect the spark plug cap,

and remove any dirt from

around the spark plug area.

Remove the spark plug with a

13/16-inch spark plug wrench.

Inspect the spark plug.

Replace it if damaged, badly

fouled, if the sealing washer

is in poor condition, or if the

electrode is worn.

Measure the spark plug

electrode gap with a wire-

type feeler gauge. Correct the

gap, if necessary, by carefully

bending the side electrode.

The gap should be:

0.70 0.80 mm (0.028 0.031 in)

Install the spark plug carefully,

by hand, to avoid cross-

threading.

After the spark plug is seated, tighten with a 13/16-inch spark

plug wrench to compress the sealing washer.

When installing a new spark plug, tighten 1/2 turn after the spark

plug seats to compress the washer.

When reinstalling the original spark plug, tighten 1/8 1/4 turn

after the spark plug seats to compress the washer.

A loose spark plug can overheat and damage the engine.

Overtightening the spark plug can damage the threads in the

cylinder head.

Attach the spark plug cap to the spark plug.

A dirty air cleaner will restrict air flow to the carburetor, reducing

engine performance. If you operate the engine in very dusty areas,

clean the air filter more often than specified in the MAINTENANCE

SCHEDULE.

Operating the engine without an air filter, or with a damaged air

filter, will allow dirt to enter the engine, causing rapid engine wear.

This type of damage is not covered by the

Distributor’s Limited

Warranty.

Release the retaining clip, and remove the air cleaner cover.

Hook the bottom edge of the air cleaner cover onto the case,

then secure the cover with the retaining clip.

Wipe dirt from the inside of the air cleaner case and cover, using

a moist rag. Be careful to prevent dirt from entering the air duct

that leads to the carburetor.

Foam air filter element: Clean in warm soapy water, rinse, and

allow to dry thoroughly. Or clean in nonflammable solvent and

allow to dry. Dip the filter element in clean engine oil, then

squeeze out all excess oil. The engine will smoke when started if

too much oil is left in the foam.

Paper air filter element: Tap the filter element several times on a

hard surface to remove dirt, or blow compressed air [not

exceeding 207 kPa (2.1 kgf/cm

, 30 psi)] through the filter

element from the inside. Never try to brush off dirt; brushing will

force dirt into the fibers.

Clean the air filter elements if they are to be reused.

Remove and inspect the air filter elements. If the air filter

element is dirty, clean the air filter elements as described below.

Replace damaged filter elements. Always replace the paper air

filter element at the scheduled interval (see page ).

Place the foam air filter element over the paper element, and

reinstall the assembled air filter elements. Insert the open end of

the air filter elements into the case as shown, so the closed end

is toward the air cleaner cover.

05/02/09 13:18:16 32Z4F800_008

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Honda Honda Engines GX120 Regular Manual

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