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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
Model
Item
CS 33EDT/CS 33EDTP
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) 11,500 to 13,000
Clutch engagement min
-1
(rev./min) 4,200 or more
Accelerating performance — Smooth acceleration
Gap between magneto rotor and
ignition coil
mm 0.2 to 0.4
Spark plug — NGK BPMR7A
Gap between spark plug electrodes mm 0.6 to 0.7
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 chain blade drive links — 45 (12”), 52 (14”)
REPAIR GUIDE
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