Craftsman 247.774500 Manual del operador descargar pdf (Pagina 11)

EngineMaintenance

Check Engine0il

• Remove oil fill dipstick.

• Check oil level on dipstick. Level should be at

FULL mark.

• Replace dipstickand tighten.

Changing Engine0il

• Only use high qualitydetergent oil rated withAPI

service classificationSF, SG, or SH. Select the

oil's SAE viscosity grade according to the

expected operating temperature. Refer to

operation section for viscositychart.

• Stop engine and wait several minutes before

checking oil level. With engine on level ground,

the oil must be to FULL mark on dipstick.

• Change engine oil after the first five hoursof

operation, and every 50 hoursthereafter. Change

oil every 25 hours of operation ifthe engine is

operated under heavy load or in high ambient

temperatures.

To Drain0il

Drain oilwhile engine is warm. Followthe instructions

given below.

• Remove oil drain plug and fill dipstick.Catch oil in

a suitable container.

• When engine is drained of all oil, replace drain

plug securely.

• Refill with fresh oil, using the recommended

grade.

• Replace dipstick.

ServiceAir Cleaner

The air cleaner prevents damaging dirt, dust, etc.,

from entering the carburetor and being forced intothe

engine and is important to engine life and

performance. The air cleaner consistsof a paper pre-

cleaner and a foam filter cartridge.

WARNING: Never run the engine without

an air cleaner completely assembled.

Replace paper pre-cleaner once a year or every

100 operating hours. Replace more frequently if

operating under dusty conditions. Replacement

filters are available at any Sears Service Center.

NOTE: Do not attempt to clean or oil the paper pre-

cleaner element.

• Service cartridge every 3 months or every 25

operating hours. Service cartridge more often

under dusty conditions.

To ServiceFoamCartridge

• Loosen air cleaner cover screws, but do not

remove screw from cover. Swing cover down to

remove from hinge.

• Inspect filter for discoloration or dirt

accumulation. If either is present, proceed as

follows:

• Clean inside of body and cover thoroughly.

• Remove foam cartridge and wash in liquid

detergent and water. Squeeze dry in a clean

cloth and saturate in engine oil. Squeeze (don't

twist) in a clean absorbent cloth to remove all

excess oil.

• Reassemble foam cartridge and paper pre-

cleaner in the body. Swing cover down and

tighten the two screws loosened earlier.

WARNING: Temperature of muffler and

nearby areas may exceed 150° F(65°C).

Avoid these areas.

ServiceSparkPlug

• Clean the spark plug and reset the gap to .030" at

least once a season or every 50 hoursof

operation. See Figure 9.

• Clean area around spark plug. Remove and

inspect spark plug.

• Replace if electrodes are pitted, burned or the

porcelain is cracked.

• Check electrode gap with wire feeler gauge and

reset gap to .030 inches.

NOTE: Do not sandblast spark plug. Spark plug

should be cleaned by scraping or wire brushing and

washing with a commercial solvent.

.030" Feeler Gau

Figure 9

Clean Engine

• Clean engine periodically, by removing dirt and

debris with a cloth or brush.

NOTE: Cleanig with a forceful spray of water is not

recommended as water could contaminate the fuel

system.

• To ensure smooth operation of the engine, keep

the governor linkage, springs, and controls free

of debris.

• Every 100 hours of operation, remove

combustion deposits from top of cylinder, cylinder

head, top of piston, and around valves.

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Craftsman 247.774500 Manual del operador Pagina 11

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