DeWalt DW650LAG Instruction Manual download pdf (Page 9)

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High Altitude Operating

Athighaltitude,thestandardcarburetorair-fuelmixturewillbetoo

rich. Performance will decrease and fuel consumption will increase.

A very rich mixture will also foul the spark plug and cause hard

starting.

High altitude performance can be improved by specific modifica-

tions to the carburetor. If you always operate your engine at altitudes

above 1,524 meters (5,000 feet), have your authorized service cen-

ter perform a carburetor modification.

Even with a carburetor modification, engine horsepower will decrease

about 3.5% for each 300 meter (1,000 feet) increase in altitude. The

effect of altitude on horsepower will be greater than this if no car-

buretor modification is made. A decrease in engine horsepower will

decrease the power output of the engine.

NOTE: When the carburetor has been modified for high altitude

operation,theair-fuelmixturewillbetooleanforlowaltitudeuse.If

the engine is used at low altitudes after a carburetor modification, the

carburetor may cause the engine to overheat and result in serious

engine damage. For use at low altitudes, have your authorized ser-

vice center return the carburetor to original factory specifications.

MAINTENANCE

WARNING: When cleaning, use only mild soap and a damp cloth

on plastic parts. Many household cleaners contain chemicals which

could seriously damage plastic. Also, do not use gasoline, turpen-

tine, lacquer or paint thinner, dry cleaning fluids or similar products

which may seriously damage plastic parts. Never let any liquid get

inside the engine; never immerse engine into a liquid.

The following procedures must be followed when maintenance or

service is performed on the engine.

Any service operations not included in this section should be performed

by a D

eWALT factory service center or a DeWALT authorized service

center.

This engine is only for use in D

eWALT approved applications. If used

in unapproved applications, D

eWALT is not responsible for repairs or

damage and the warranty if void.

Maintenance Chart

PROCEDURE



100 





(whichever

comes first)





(whichever

comes first)



Clean air filter (3)

Check oil level

Change oil (1,2,3)

Clean spark plug

Cleanengine’sexterior

Check and adjust valve clearance

(.15 mm intake, .2 mm exhaust) (2)

Clean spark

arrester (if equipped)

Clean debris screen (if equipped)

1. The engine oil must be changed after the first 20 hours of

operation. Thereafter change oil every 150 hours of operation

or monthly, whichever comes first.

See DeWALT shop manual for detail instructions.

Perform more frequently in dusty or humid conditions

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DeWalt DW650LAG Instruction Manual Page 9

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