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11 — English
MAINTENANCE
Stop the engine and disconnect the spark plug wire.
Gather two of the pre-cut lengths of trimmer line provided
or cut two pieces of trimmer line, in 11 in. lengths.
Insert the lines into the slots located on the sides of the
string head. Line should be pushed in until approximately
1 in. protrudes from the holes on the top of the string
head.
Remove old line by pulling it from the holes located on
the top of the string head.
CLEANING THE EXHAUST PORT AND
MUFFLER
NOTE: Depending on the type of fuel used, the type and
amount of lubricant used, and/or your operating conditions, the
exhaust port, muffler, and/or spark arrestor screen may be-
come blocked with carbon deposits. If you notice a power
loss with your gas powered tool, you may need to remove
these deposits to restore performance. We highly recom-
mend that only qualified service technicians perform this
service.
SPARK ARRESTOR
The spark arrestor must be replaced every 50 hours or yearly
to ensure proper performance of your product. Spark arres-
tors may be in different locations depending on the model
purchased. Please contact your nearest service dealer for
the location of the spark arrestor for your model.
IDLE SPEED ADJUSTMENT
See Figure 21.
If the cutting attachment turns at idle, the idle speed screw
needs adjusting on the engine. Turn the idle speed screw
counterclockwise to reduce the idle RPM and stop the cut-
ting attachment movement. If the cutting attachment still
moves at idle speed, contact a service dealer for adjustment
and discontinue use until the repair is made.
WARNING:
The cutting attachment should never turn at idle. Turn
the idle speed screw counterclockwise to reduce the
idle RPM and stop the cutting attachment, or contact a
service dealer for adjustment and discontinue use until
the repair is made. Serious personal injury may result
from the cutting attachment turning at idle.
CLEANING AIR FILTER SCREEN
See Figures 22 - 23.
For proper performance and long life, keep air filter screen
clean.
Remove the air filter cover by pushing down on the latch
with your thumb while gently pulling on the cover.
Brush the air filter screen lightly to clean.
Replace the air filter cover by inserting the tabs on the
bottom of the cover into the slots on the air filter base;
push the cover up until it latches securely in place.
FUEL CAP
WARNING:
A leaking fuel cap is a fire hazard and must be replaced
immediately.
The fuel cap contains a non-serviceable filter and a check
valve. A clogged fuel filter will cause poor engine perfor-
mance. If performance improves when the fuel cap is loos-
ened, check valve may be faulty or filter clogged. Replace
fuel cap if required.
SPARK PLUG REPLACEMENT
This engine uses an NGK CMR7A or Champion RZ7C spark
plug with .025 in. electrode gap. Use an exact replacement
and replace annually.
CHANGING ENGINE LUBRICANT
See Figure 24.
For best performance, engine lubricant should be changed
after every 25 hours of operation.
To change the engine lubricant:
Stop the engine and disconnect the spark plug wire. Allow
the engine to cool completely before proceeding.
Remove the screw from the top engine cover and set
aside.
Remove the screws from the bottom of the engine cover.
Remove the bottom cover and set aside.
Remove the oil fill cap/dipstick.
Tip powerhead on its side and allow lubricant to drain
from the oil fill hole into an approved container.
NOTE: Drain the lubricant while the engine is still warm
but not hot. Warm lubricant will drain quickly and more
completely.
Return the power head to an upright position and refill
with lubricant following the instructions in the Adding/
Checking Engine Lubricant section previously in this
manual.
Reinstall the bottom engine cover. Replace the screws
and tighten securely.
Replace the screw in the top engine cover and tighten
securely.
NOTE: Used lubricant should be disposed of at an approved
disposal site. See your local retailer for more information.