-8-
This section describes repair, focusing on portions requiring frequent repair. Refer to the previous section
TROUBLESHOOTING GUIDE as the context below follows it.
1. Precautions on maintenance, inspection and repair
The fuel used readily ignites; therefore, never bring the product near a flame.
Use new gaskets at reassembly.
Prior to disassembly for repair, remove the fuel and chain oil into separate containers, and allow the
engine to cool down.
When performing repair, startup or running, use adequate care for portions posing the risk of burn injury
or electric shock, such as hot areas including the muffler, high voltage cord and spark plug.
Before running the product with the chain bar and chain blades attached, make sure that there are no
other people nearby.
Ensure proper ventilation when performing repair in a small room or other poorly ventilated space.
After completing repair, always return the throttle lever to the idling position and set the stop switch to
the engine stop position.
2. Inspection criteria for each section and consumable parts
Item CS33EA / CE33ET
Idling revolutions min
-1
(rev./min) 2,800 to 3,200
No-load maximum revolutions (with
guide bar and chain blades)
min
-1
(rev./min) 12,000
Clutch engagement min
-1
(rev./min) 4,100 to 4,500
Accelerating performance To be smoothly accelerated
Gap between the magneto rotor and
ignition coil
mm 0.3
Spark plug NGK BPM6A or BPMR6A
Gap between spark plug electrodes mm 0.6
Adjustment of chain oil discharge
amount
1-1/4 turns back from totally
closed position
Height of the carburetor metering lever
Position 1.65 mm lower than
carburetor body surface
Chain blade type Oregon 91VG
Chain blade pitch x gauge inch 3/8 x 0.05
No. of the chain blade drive links 45 (12”), 52(14”)
REPAIR GUIDE
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