Air Index; Specifications - Honda HS520A Owner's Manual

Problems That May Affect Emissions
If you are aware of any of the following symptoms, have your engine
inspected and repaired by your authorized Honda servicing dealer.
• Hard starting or stalling after starting
• Rough idle
• Misfiring or backfiring under load
• Afterburning (backfiring)
• Black exhaust smoke or high fuel consumption
Replacement Parts
The emission control systems on your new Honda engine were
designed, built, and certified to conform with EPA, California, and
Canadian emission regulations. We recommend the use of Honda
Genuine parts whenever you have maintenance done. These
original-design replacement parts are manufactured to the same
standards as the original parts, so you can be confident of their
performance. The use of replacement parts that are not of the original
design and quality may impair the effectiveness of your emission
control system.
A manufacturer of an aftermarket part assumes the responsibility the
part will not adversely affect emission performance. The manufacturer
or rebuilder of the part must certify that use of the part will not result in
a failure of the engine to comply with emission regulations.
Maintenance
Follow the MAINTENANCE SCHEDULE on
this schedule is based on the assumption that your machine will be
used for its designed purpose. Sustained high-load operation will
require more frequent service.

AIR INDEX

An Air Index Information hang tag/label is applied to engines certified
to an emission durability time period in accordance with the
requirements of the California Air Resources Board.
The bar graph is intended to provide you, our customer, the ability to
compare the emissions performance of available engines. The lower
the Air Index, the less pollution.
The durability description is intended to provide you with information
relating to the engine's emission durability period. The descriptive
term indicates the useful life period for the engine's emission control
system. See your EMISSION CONTROL SYSTEM WARRANTY
(page 21) for additional information
Descriptive Term
Moderate
Intermediate
Extended
.
18
page 11. Remember that
.
Applicable to Emission
Durability Period
50 hours (0–80 cc inclusive)
125 hours (greater than 80 cc)
125 hours (0–80 cc inclusive)
250 hours (greater than 80 cc)
300 hours (0–80 cc inclusive)
500 hours (greater than 80 cc)
1000 hours (225 cc and greater)

SPECIFICATIONS

Frame
Model
Description code
Length x Width x Height
Dry weight
Snow clearance (h x w)
Max. snowthrowing distance
(varies with conditions and
snow)
Continuous operating time*
Clearing capacity
Noise level
* Operating time will vary depending on the depth and weight of the
snow.
Engine Design and Performance
Model
Displacement
Bore x stroke
Starting method
Ignition system
Oil capacity
Fuel tank capacity
Spark plug
Maintenance
Fuel
Engine oil
Tune-up
Spark plug gap
Valve clearance
Other specifications
HS520
SZBG
49.5 x 20.7 x 40.4 in
(1258 x 527 x 1026 mm)
HS520A: 82 lbs (37 kg)
HS520AS: 88 lbs (40 kg)
12 x 20 inches (306 x 500 mm)
Front: 26 feet (8 m)
Left/right: 16 feet (5 m)
1.6 hours
55 tons/hour (50 metric tons/hour)
84.4 dB(A)
GC160
9.8 cubic inches (161 cc)
2.5 x 2.0 inches (64 x 50 mm)
HS520: recoil (pull start)
HS520AS: recoil or AC electric
Transistorized magneto
0.63 US quart (20.3 fl oz, 0.6 liter)
0.3 US gallon (1.3 liters)
NGK: BPR5ES or
DENSO: W16EPR-U
Unleaded gasoline
with an octane rating See
of 86 or higher
SAE 5W-30
See
API SJ or later
0.028 ~ 0.031 in (0.70 ~ 0.80 mm)
intake: 0.15 mm
exhaust: 0.20 mm
No other adjustments needed
page 11
page 12