Guardian Technologies 004582-2 ユーザーズマニュアル

Important: If feeling uncomfortable about doing this procedure or the 
proper tools are not available, please take the generator to the nearest 
service center to have the valve clearance adjusted. This is a very 
important step to insure longest life for the engine.

Make sure the engine is at room temperature (60° - 80° F).
Make sure that the spark plug wire is removed from the spark plug 

and out of the way.

Remove the four screws attaching the valve cover.
Make sure the piston is at Top Dead Center (TDC) of its 

compression stroke (both valves closed). To get the piston at 
TDC, remove the intake screen at the front of the engine to gain 
access to the flywheel nut. Use a large socket and socket wrench 
to rotate the nut and hence the engine in a clockwise direction 
while watching the piston through the spark plug hole. The piston 
should move up and down. The piston is at TDC when it is up as 
high as it can go.

Insert a 0.002 - 0.004 inch (0.05 - 0.1mm) feeler gauge between 

the rocker arm and valve stem. Correct clearance is when a slight 
drag is felt when sliding the gauge back and forth. If the clearance 
is either excessively loose or tight the rocker arms will need 
adjusting.

Loosen the rocker jam nut (Figure 21). Use an 10mm allen wrench 

to turn the pivot ball stud while checking clearance between 
the rocker arm and the valve stem with a feeler gauge. Correct 
clearance is 0.002-0.004 inch (0.05-0.1 mm).

When valve clearance is correct, hold the pivot ball stud in place with 
the allen wrench and tighten the rocker arm jam nut. Tighten the jam 
nut to 174 in/lbs. torque. After tightening the jam nut, recheck valve 
clearance to make sure it did not change.

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Install new valve cover gasket.
Re-attach the valve cover.

Re-attach the spark plug wire to the spark plug.
Repeat the process for the other cylinder.

The generator should be started at least once every seven days 
and be allowed to run at least 30 minutes. If this cannot be done 
and the unit must be stored for more than 30 days, use the following 
information as a guide to prepare it for storage.

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