18
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 the engine’s emission durability period. The descriptive term
indicates the useful life period for the engine’s emission control
system. See your EMISSION SYSTEM WARRANTY (page 22) for
additional information.
Specifications
Features
Dimensions and Weights
* Max snow throwing distance in forward direction and varies with
conditions and snow.
** Operating time will vary depending on the depth and weight of the
snow.
Engine Design and Performance
Maintenance
Descriptive Term Applicable to Emissions
Durability Period
Moderate 50 hours (0 ~ 80 cc)
125 hours (greater than 80 cc)
Intermediate 125 hours (0 ~ 80 cc)
250 hours (greater than 80 cc)
Extended 300 hours (0 ~ 80 cc)
500 hours (greater than 80 cc)
1000 hours (225 cc and greater)
HS720 A AS AM
AC Electric start O
Remote chute controls O O
Manual chute control lever O
GC190 4-stroke OHC engine O O O
Throws snow up to 32 feet O O O
Type A AS AM
Length 49.6 in (1260 mm)
Width 20.8 in (530 mm)
Overall height 40.5 in (1030 mm)
Dry weight 88.8 lb
(40.3 kg)
93.0 lb
(42.2 kg)
81.6 lb
(37 kg)
Snow clearing area
(W x H)
19.7 x 12.0 in (500 x 306 mm)
Clearing capacity 55 US short (50 metric) tons/hour
Max. snow throwing
distance*
32.8 ft (10 m)
Continuous
operating time**
1.0 hr
Model GC190
Type 4-stroke, overhead-cam,
single-cylinder, air-cooled
Displacement 11.4 cu in (187 cc)
Bore and stroke 2.71 x 1.97 in (69.0 x 50.0 mm)
Compression ratio 8.5:1
Ignition system Transistorized magneto
Starting system HS720A and AM: recoil (pull start)
HS720AS: AC electric or recoil
Fuel Unleaded gasoline with a pump
octane rating of 86 or higher containing
no more than 10% ethanol by volume
Capacity: 1.1 US qt (1.1 L)
See “AVOIDING FUEL-RELATED
PROBLEMS” on page 19 to prevent
fuel-related problems
page 6
Engine Oil SAE 5W-30, API SJ or later
Capacity: 0.61 qt (0.58 L)*
page 12
Spark Plug Type: NGK - BPR5ES
Gap: 0.028 ~ 0.031 in (0.7 ~ 0.8 mm)
page 12
Valve
clearance
(cold)
Intake: 0.15 ± 0.04 mm
Exhaust: 0.20 ± 0.04 mm
Shop
manual
* Actual amount will vary due to residual oil in the engine. Always
use the dipstick to confirm the actual level (page 5).
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