Troy-Bilt TB360BV Manual Del Dueño/Operador página 13

Adjust Idle Speed Screw
WARNING
:
This unit will need to be running
during idle speed adjustment. Wear protective
clothing and observe all safety instructions to
prevent serious personal injury.
Also, DO NOT set unit on any surface except a clean,
hard area while starting or performing any adjust-
ments. Debris, such as gravel, sand, dust, grass, etc.,
could be thrown by the blower tube and damage
property or cause serious injury to bystanders or
operator.
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/Stopping Instructions.
2. Move the throttle control to the idle position (
the engine idle. If the engine stops, insert a small phillips
screwdriver in between the Air Filter Cover and the Engine
Cover (Fig. 32). Turn the idle speed screw in, clockwise, 1/8
of a turn at a time (as needed) until the engine idles smoothly.
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 a qualified service dealer.
ROCKER ARM CLEARANCE
1. Remove the 2 handle screws with flat blade or T20 torx head
screwdriver, while holding the nuts with 3/8" nut driver (Fig. 33).
2. Remove top bolt located near starter rope handle with
tools mentioned in step 1 (Fig. 33).
3. Loosen screw located near top of door hinge with same
tools mentioned in step 1.
4. Open vacuum door, prop open with hand.
5. Remove handle.
6. Remove the six (6) screws on the back of the engine cover
with a Flat-head or T-25 Torx screwdriver (Fig. 34).
View Of The Rear Engine Cover
Remove
Screws
MAINTENANCE AND REPAIR INSTRUCTIONS
) and let
Remove
Screws
Fig. 33
Remove
Screws
Fig. 34
7. Disconnect the spark plug wire.
8. Clean dirt from around the spark plug. Remove the spark
plug from the cylinder head by turning a 5/8 in. socket
counterclockwise.
9. Remove the engine cover (Fig. 34).
10. 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. 35). Remove the
rocker arm cover and gasket.
11. 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 while looking in the
spark plug hole (Fig. 36).
Rocker Arms
Feeler Gauge
Spark Plug
Hole
• Both rocker arms move freely, and both valves are closed.
If these statements are not true, repeat this step.
12. Slide the feeler gauge between the rocker arm and the
valve return spring. Measure the clearance between the
valve stem and rocker arm (Fig. 36 & 37). Measure both
the intake and exhaust valves.
Adjusting Nut
.003–.006 in.
(.076–.152 mm)
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. See
Figures 36 and 37.
13
Rocker
Arm
Cover
Spark
Plug
Hole
Fig. 35
Adjusting Nuts
INTAKE
EXHAUST
Fig. 36
Rocker Arm
Feeler Gauge
Valve Stem
Fig. 37