Spark Plug Service; Spark Arrester - Hitachi Koki E43 Manual De Instrucciones

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2. Wash the element in a solution of household detergent and warm water, then rinse thoroughly, or wash in
nonflammable or high flash point solvent. Allow the element to dry thoroughly.
3. Soak the element in clean engine oil and squeeze out the excess oil as shown in Fig.17. The engine will
smoke during initial start-up if too much oil is left in the element.
4. Reinstall the air filter element cover.
AIR CLEANER COVER
CLIP
CLIP
Fig.17
FUEL SEDIMENT CUP CLEANING
The sediment cup prevents dirt or water, which may be in the fuel tank from
entering the carburetor. If the engine has not been run for a long time, the
sediment cup should be cleaned.
1. Turn the fuel valve to the off position (horizontal to the ground). Remove the
sediment cup, and O-ring as shown in Fig.18.
2. Clean the sediment cup, and the O-ring, in nonflammable or high flash point
solvent.
3. Reinstall O-ring, and sediment cup.
4. Turn the fuel valve on and check for fuel leaks.

SPARK PLUG SERVICE

To service the spark plug, you will need a spark plug wrench like the one
included with generator. Use recommended spark plugs:BPR6ES(NGK),
W20EPR-U(DENSO). To ensure proper engine operation, the spark plug must be
properly gapped and free of deposits.
CAUTION: If the engine has been running, the muffler will be very hot. Be
careful not to touch the muffler. Be sure to allow the engine to
cool before you touch the spark plug.
1. Remove the spark plug cap.
2. Clean any dirt from around the spark plug base.
3. Use a spark plug wrench to remove the spark plug.
4. Visually inspect the spark plug. Replace it if the insulator is cracked or chipped.
Clean the spark plug with a wire brush if you plan to reuse it.
5. Measure the plug gap with the feeler gauge. Correct as necessary by carefully
bending the side electrode (Fig.19). The gap should be: 0.028-0.031 in (0.70-
0.80 mm)
6. Check that the spark plug washer is in good condition. If it is not, thread the
spark plug in by hand to prevent cross threading.
7. After the spark plug is seated, tighten with a spark plug wrench to compress
the washer. If you are installing a new spark plug, tighten the spark plug 1/2
turn after it seats to compress the washer. If you are reinstalling a used spark
plug, tighten 1/8–1/4 turn after the spark plug seats to compress the washer.
NOTE:
The spark plug must be securely tightened. An improperly tightened
spark plug can become very hot and could damage the engine. Never
use spark plugs which have an improper heat range. Use only the
recommended spark plugs or equivalent.

SPARK ARRESTER

CAUTION: If the generator has been running, the muffler will be very hot.
Allow cooling before proceeding.
NOTE:
The spark arrester must be serviced every 100 hours to maintain its efficiency.
1. Using a Phillips-head screwdriver, remove the spark arrester screw as shown in Fig.20.
2. Use brush to remove carbon deposits from the spark arrester screen as shown in Fig.20. Inspect the spark
arrester screen for holes or tears. Replace the spark arrester if necessary.
16
AIR CLEANER ELEMENT
AIR CLEANER ELEMENT
O-RING
FUEL CUP
Fig.18
0.028-0.031 in
(0.70-0.80 mm)
Fig.19