PROBLEM
SOLUTION
IDLE SPEED ADJUSTMENT
The idle speed of the engine is adjustable. An idle adjustment screw is between the
air filter cover and the engine starter housing (Fig. 19).
NOTE:
Careless adjustments can seriously damage your unit. An authorized
service dealer should make carburetor adjustments.
If, after checking the fuel and cleaning the air filter, the engine still will not idle, adjust the idle speed screw as follows:
1. Start the engine and let it run at a high idle for a minute to warm up. Refer to
Starting and Stopping Instructions
.
2. Release the throttle lever and let the engine idle. If the engine stops, insert a small Phillips in between the air filter
cover and the engine cover (Fig. 19). Turn the idle speed screw in, clockwise, 1/8 of a turn at a time (as needed)
until the engine idles smoothly.
NOTE:
The blade should not rotate when the engine idles.
3. If the blade rotates when the engine idles, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as
needed), to reduce idle speed.
Checking the fuel, cleaning the air filter, and adjusting the idle speed should solve most engine problems. If not and all
of the following are true:
• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
Have the carburetor adjusted by an authorized service dealer.
ROCKER ARM CLEARANCE
This requires disassembly of the engine. If unsure or unqualified to perform this, take the unit to an authorized service
center.
NOTE:
Inspect the valve to rocker arm clearance with a feeler gauge per the maintenance schedule.
• The engine must be cold when checking or adjusting the valve clearance.
• This task should be performed inside, in a clean, dust free area.
1. Remove the six (6) screws on the back of the engine cover with a Flat-head or T-
25 Torx screwdriver (Fig. 20).
2. Disconnect the spark plug wire.
3. Clean dirt from around the spark plug. Remove the spark plug from the cylinder
head by turning a 5/8 in. socket counterclockwise.
4. Remove the engine cover (Fig. 20).
5. Clean dirt from around the rocker arm cover. Remove the screw holding the rocker
arm cover with a large flat blade screwdriver or Torx T-25 bit (Fig. 21). Remove the
rocker arm cover and gasket.
6. Pull the starter rope slowly to bring the piston to the top of its travel, (known as
top dead center). Check that:
•
The piston is at the top of its travel. This should be done by looking into the
spark plug hole. (Fig. 21)
•
Both rocker arms move freely, and both valves are closed
If these statements are not true, repeat this step.
7. Slide the feeler gauge between the rocker arm and the valve return spring.
Measure the clearance between the valve stem and rocker arm (Fig. 23). Measure
both the intake and exhaust valves.
The recommended clearance for both intake and exhaust is
.003 – .006 in. (.076 –
0.152 mm)
. Use a standard automotive .005 in. (0.127 mm) feeler gauge. The feeler
gauge should slide between the rocker arm and valve stem with a slight amount of
resistance, without binding (Fig. 23).
8. If the clearance is not within specification:
a. Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver (Fig. 23).
•
To increase clearance, turn the adjusting nut counterclockwise.
•
To decrease clearance, turn the adjusting nut clockwise.
b. Recheck both clearances, and adjust as necessary.
9. Reinstall the rocker arm cover using a new gasket. Torque the screw to
20–30
in•lb (2.2–3.4 N•m)
.
10. Check the spark plug and reinstall. See
Replacing the Spark Plug
.
11. Replace the spark plug wire.
12. Reinstall the engine cover. Check alignment of the cover before tightening the
screws. Tighten screws.
REPLACING THE SPARK PLUG
Use a replacement
Champion® #RDZ4H
spark plug. The correct air gap is
0.025 in.
(0.635 mm)
. Remove the plug and check its condition per the maintenance schedule.
1. Stop the engine and allow it to cool. Remove the six (6) screws on the back of the
engine cover with a Flat-head or T-25 screwdriver (Fig. 20).
2. Grasp the plug wire firmly and pull the cap from the spark plug.
3. Clean dirt from around the spark plug. Remove the spark plug from the cylinder
head by turning a 5/8 in. socket counterclockwise.
4. Replace cracked, fouled or dirty spark plug. Set the air gap at
0.025 in. (0.635
mm)
using a feeler gauge (Fig. 24).
5. Install a correctly-gapped spark plug in the cylinder head. Turn the 5/8 in. socket clockwise until snug.
If using a torque wrench torque to:
110-120 in.•lb. (12.3-13.5 N•m)
Do not over-tighten.
CLEANING
Use a small brush to clean off the outside of the unit. Do not use strong detergents. Household cleaners that contain
aromatic oils such as pine and lemon, and solvents such as kerosene, can damage plastic housing or handle. Wipe off
any moisture with a soft cloth.
STORAGE
• Never store the unit with fuel in the tank where fumes may reach an open flame or spark.
• Allow the engine to cool before storing.
• Lock up the unit to prevent unauthorized use or damage.
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
LONG TERM STORAGE
1. Drain all gasoline from the gas tank into a container. Do not use gas that has been stored for more than 30 days.
Dispose of the old gasoline in accordance to federal, state and local regulations.
2. Start the engine and allow it to run until it stalls. This ensures that all gasoline has been drained from the carburetor.
3. Allow the engine to cool. Remove the spark plug and put 5 drops of high quality motor oil into the cylinder. Pull the
starter rope slowly to distribute the oil. Reinstall the spark plug.
NOTE:
Remove the spark plug and drain all of the oil from the cylinder before attempting to start the edger after storage.
4. Change the oil, referring to
Changing the Oil
. Dispose of the old oil in accordance to federal, state and local
regulations.
5. Thoroughly clean the unit and inspect for any loose or damaged parts. Repair or replace damaged parts and
tighten loose screws, nuts or bolts. The unit is ready for storage.
UNIT*
Engine Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 4-Cycle
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 cc
Operating RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,800+ rpm
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,800 - 4,200 rpm
Valve clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.003–0.006 in. (0.076–0.152 mm)
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 in. (0.635 mm)
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAE 30 Oil
Crankcase Oil Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.04 oz (90 ml)
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unleaded
Fuel Tank Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 oz (414 ml)
Unit Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24.7 lbs. (11.2 kg)
Cutting Depth (maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.75 in. (44.5 mm)
SPECIFICATIONS
*
All specifications are based on the latest product information available at the time of printing. We reserve the right
to make changes at any time without notice.
WARNING:
To avoid serious personal injury, always turn the unit off and allow it to cool before
cleaning or maintaining it.
CLEANING AND STORAGE
4
ELECTRIC STARTER AND POWER START BIT™ FEATURES
This unit can be started with an optional Electric Starter or Power Start Bit™ (Items Sold Separately!). If choosing to
start the unit using one of these features or have questions, please contact your local retailer or call
1-800-828-5500
in
the U.S. (
1-800-668-1238
in Canada) for more information and purchasing. You may also go to
www.troybilt.com
or
www.troybilt.ca
.
Electric Start
Feature
WARNING:
Do not sand blast, scrape or clean spark plug
electrodes. Grit in the engine could damage the cylinder.
Fig. 19
Idle Adjustment Screw
Fig. 20
Fig. 21
Screws
Fig. 22
MAINTENANCE AND REPAIR INSTRUCTIONS
Fig. 23
WARNING:
The blade may spin during idle speed adjustments.
Wear protective clothing and observe all safety instructions to prevent
serious personal injury.
Fig. 24
0.025 in.
(0.635 mm)
Screws
View of the Rear
Engine Cover
Screw
Rocker
Arm Cover
Spark
Plug Hole
Adjusting
Nuts
INTAKE
EXHAUST
Rocker
Arms
0.003–0.006 in.
(0.076–0.152 mm)
Feeler
Gauge
Exhaust
Adjusting Nut
Rocker Arm
Valve Stem
OPTIONAL ACCESSORY
Old fuel
Drain gas tank and add fresh fuel
Fouled spark plug
Replace or clean the spark plug
Old fuel
Drain gas tank and add fresh fuel
Blade bound with dirt or grass
Stop the engine and clean the blade
Dirty air filter
Clean or replace the air filter
Empty fuel tank
Fill fuel tank with fuel
Primer bulb wasn't pressed enough
Press primer bulb fully and slowly 10 times
Old fuel
Drain gas tank and add fresh fuel
Fouled spark plug
Replace or clean the spark plug
Cold weather start lever is in closed position
Move cold weather start lever to open position
Air filter is plugged
Replace or clean the air filter
Old fuel
Drain gas tank and add fresh fuel
Improper idle speed
Adjust according to the
Idle Speed Adjustment
section
TROUBLESHOOTING
THE ENGINE WILL NOT START
THE ENGINE WILL NOT IDLE
THE ENGINE WILL NOT ACCELERATE
NOTE:
For repairs beyond the minor adjustments listed above, locate your nearest authorized service center by
calling the Customer Support Department at
1-800-828-5500
(U.S.) or
1-800-668-1238
(Canada).
THE ENGINE LACKS POWER OR STALLS
