Joyner Dirt Devil 250 2004, Owner'S Manual And Parts Manual

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SERVICE INSTRUCTIONS
D. Spark Plug
a.
Remove the spark plug and inspect it each time you change
the oil. (Use a spark plug wrench) The electrodes should be
kept clean and free of carbon. The presence of carbon or
excess oil will greatly reduce proper engine performance. If
possible, check the spark plug gap (area between electrodes)
using a wire feeler gauge. This specification is 0.025” -0.030” .
b.
Before installing spark plug coat threads lightly with graphite
grease if possible, to ensure easy removal next time the spark
plug needs inspection.
c. It is advisable to replace the spark plug at least once a year to
insure easy starting and good engine performance.
Figure II
Figure 10
E. Carburetor Adjustment
Never make unnecessary adjustments. The factory recommended settings are correct for most
applications. It’s not necessary to disassemble the screw unless the carburetor needs to be replaced.
Prepare a 50r/w tachometer before adjustment.
a. Warm up the engine (5~l0min)
b.
Tighten the air screw gentle. Back out 2-3/8 turns counter clockwise.
c. Connect the tachometer, adjust the throttle to limit the idle speed. The standard value is (1400RPM).
d.
Turn the air screw counter slowly and observe the RPM of the engine, stop adjusting as the RPM
reaches the top speed.
e. Adjust the screw and adjust the idle speed to an ideal value.
f.
Repeat step 4 and 5 until the rotate speed of engine stables.
F. Cleaning Instructions
Keep your kart clean. With a clean rag, wipe off and dirt and oil from around controls. Wipe off any
spilled fuel and oil. Keep the engine clean of foreign object and be sure to check that air intake fan is
free of debris for proper cooling.
G. Kart Lubrication
Lubricate vehicle every 90 days of use. Apply several drops of oil in specific points.