Specifications - Stihl HL 90 Instruction Manual

Definitions
1. Cap
Secures the shaft in the drive tube
during transportation.
2. Hand Guard
Limits useable grip area for left hand
in direction of gearbox and blades.
Helps protect hand from cuttings.
3. Handle Hose
For holding and controlling the unit
with the hand during operation.
4. Drive Tube
Encloses and protects the drive
shaft between the engine and
gearbox.
5. Slide Control
For starting throttle, run and stop.
Keeps the choke partially open
during starting and switches off the
ignition to stop the engine.
6. Throttle Trigger Lockout
Must be depressed before the
throttle trigger can be activated.
7. Throttle Trigger
Controls the speed of the engine.
8. Choke Knob
Eases engine starting by enriching
mixture.
9. Spark Plug Boot
Connects the spark plug with the
ignition lead.
10. Air Filter Cover
Encloses and protects the air filter.
11. Fuel Tank
For fuel and oil mixture.
HL 90 K
12. Machine Support
For resting machine on the ground.
13. Cutting Blades
Steel blades for cutting hedges and
shrubs.
14. Blade Scabbard
Covers cutting blades when hedge
trimmer is not in use.
15. Cutting Blade Guard
Helps to reduce the risk of operator
contact by the cutter blade.
16. Blade Drive Gear
Converts rotary movement of angle
drive into reciprocating movement
of cutting blades.
17. Angle Drive
Transmits rotary motion of drive
shaft to the blade drive gear.
18. Fuel Filler Cap
For closing the fuel tank.
19. Carburetor Adjusting Screws
For tuning the carburetor.
20. Fuel Pump
Provides additional fuel feed for a
cold start.
21. Starter Grip
The grip of the pull starter, for
starting the engine.
22. Muffler with Spark Arresting
Screen
Muffler reduces exhaust noises and
diverts exhaust gases away from
operator. Spark arresting screen is
designed to reduce the risk of fire.

Specifications

EPA / CEPA
The Emission Compliance Period
referred to on the Emissions
Compliance Label indicates the number
of operating hours for which the engine
has been shown to meet Federal
emission requirements.
Category
A = 300 hours
B = 125 hours
C = 50 hours
Engine
STIHL single cylinder four-stroke engine
with mixture lubrication
Displacement: 28.4 cm
Bore: 38 mm
Stroke: 25 mm
Engine power to 0.95 kW (1.3 HP)
ISO 8893: at 7,000 rpm
Idle speed: 2,800/min
Cut-off speed (rated): 10,500 rpm
Stroke rate: 4,100/min
Valve clearance
Inlet valve: 0.10 mm
Exhaust valve: 0.10 mm
Ignition System
Electronic magneto ignition
English
3
25