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1. Check the following before starting the engine.
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Confirm that the crank shaft rotates and there is compression when pulling the starter handle.
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Turn on (push) the decompression valve and confirm that the starter handle can be pulled lightly.
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Perform priming ten times and then confirm that the priming pump is full of fuel.
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Activate the chain brake and confirm that the saw chain is locked.
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Pull the throttle lever while pulling the choke button, and then confirm that the choke button returns
automatically.
2. Check the following after starting the engine.
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Confirm that the engine starts up by following the procedure below.
(1) Set the stop switch to the startup position.
(2) Activate the chain brake.
(3) Perform priming ten times.
(4) Keep pulling the choke button.
(5) Turn on (push) the decompression valve.
(6) Pull the starter handle and check for initial ignition.
(As a guide, 3 to 5 times at ambient temperature (20°C). * Increase the number of pulling times at low
temperature.)
(7) Push in the choke button. (This will automatically lock half-throttle status.)
(8) Turn on (push) the decompression valve.
(Note that the decompression valve returns automatically to the OFF position under combustion
pressure.)
(9) Pull the starter handle to start the engine.
(Tip: 2 or 3 times at ordinary temperature (20°C) * Pull the handle more under low ambient
temperature.)
(10) Lightly pull the throttle lever and confirm that half-throttle status is canceled and the engine returns to
idling. (Do not run the engine in half-throttled status with the chain brake on.)
(11) Release the chain brake.
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Make sure that the respective moving and rotating parts work smoothly without any abnormal noise.
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Adjust the carburetor. (See "2. Adjustment of the carburetor" under the "Inspection and repair
procedures.")
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Make sure that the saw chain does not run while the engine is idling.
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Operate the throttle lever without gripping the trigger lockout, and make sure that engine revolutions do
not increase.
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Check both idling engine speed and full engine speed without a load (with the saw chain mounted).
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Make sure that the engine accelerates smoothly.
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Release the throttle lever and make sure that the engine idles.
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Let the engine idle, and then rapidly accelerate and decelerate the engine. Make sure that the engine
does not stop.
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Make sure that chain oil is supplied normally to the saw chain.
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Reset the stop switch to the stop position and make sure that the engine stops.
Confirmation after reassembly
