Generac 005751-0 ユーザーズマニュアル

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 A battery presents a risk of electrical shock 

and high short circuit current. The following 

precautions are to be observed when work-

ing on batteries:

• Remove watches, rings or other metal objects;

• Use tools with insulated handles;

• Wear rubber gloves and boots;

•  Do not lay tools or metal parts on top of the 

battery;

•  Disconnect any charging source prior to connect-

ing or disconnecting battery terminals; and

•  Do not use any jumper cables or booster battery 

to crank and start the generator engine. If any 

battery has discharged, remove it for recharging.

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  Do not open or mutilate the battery. 

Released electrolyte has been known to 

be harmful to the skin and eyes, and to be 

toxic.

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 The electrolyte is a dilute sulfuric acid that 

is harmful to the skin and eyes. It is electri-

cally conductive and corrosive. The follow-

ing procedures are to be observed:

• Wear full eye protection and protective clothing;

•  Where electrolyte contacts the skin, wash it off 

immediately with water;

•  Where electrolyte contacts the eyes, flush 

thoroughly and immediately with water and 

seek medical attention; and

•  Spilled electrolyte is to be washed down with 

an acid neutralizing agent. A common practice 

is to use a solution of 1 pound (500 grams) 

bicarbonate of soda to 1 gallon (4 liters) or 

water. The bicarbonate of soda solution is to 

be added until the evidence of reaction (foam-

ing) has ceased. The resulting liquid is to be 

flushed with water and the area dried.

in the engine, adjust if necessary.
Important: If feeling uncomfortable about doing this procedure or 

the proper tools are not available, please contact the Authorized 

Dealer for service assistance. This is a very important step to 

insure longest life for the engine.
To check valve clearance:

The engine should be cool before checking. If valve clearance is 

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0.002" - 0.004" (0.05 - 0.1mm), adjustment is not needed.

Remove spark plug wires and position wires away from plugs.

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Remove spark plugs.

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Make sure the piston is at Top Dead Center (TDC) of its com-

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pression 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 at its highest point of travel.

Make sure the engine is at 60° to 80° F.

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Make sure that the spark plug wire is removed from the spark 

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plug and out of the way.

Remove the four screws attaching the valve cover with a #2 or 

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#3 Phillips screwdriver.

Loosen the rocker jam nut. Use an 10mm allen wrench to turn 

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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). (Figure 3.7).

Jam Nut

Pivot Ball

Stud

Rocker 

Arm

Valve

Stem

turned.
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.

Install new valve cover gasket.

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Re-attach the valve cover.

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Install spark plugs.

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Re-attach the spark plug wire to the spark plug.

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On the GT-530, repeat the process for the other cylinder.

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Maintenance