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Engine: . . . (Ref. see Kohler Manual)
Power (@3600 rpm):
CH22 . . . . . . . . . 16.4 kW (22hp)
CH25 . . . . . . . . . 18.6 kW (25hp)
Peak Torque:
CH22 . . . . . . . . . 45 N*m (33 ft.lbs.)
CH25 . . . . . . . . . 53 N*m (39.5 ft.lbs.)
Bore
CH22 . . . . . . . . . 77 mm (3.03 in.)
CH25 . . . . . . . . . 83 mm (3.27 in.)
Stroke: . . . . . . . . . . 67 mm (2.64 in.)
Displacement:
CH22 . . . . . . . . . 624cc (38 cu.in.)
CH25 . . . . . . . . . 725cc (44 cu.in.)
Compression Ratio:
CH22 . . . . . . . . . 8.5:1
CH25 . . . . . . . . . 9.0:1
Dry Weight:
CH22 . . . . . . . . . 41 kg (90 lbs.)
CH25 . . . . . . . . . 43 kg (94 lbs.)
Oil Capacity (with filter):
CH22 . . . . . . . . . 2.0 U.S. qts. (1.9 L)
CH25 . . . . . . . . . 2.1 U.S. qts. (2.0 L)
Angle of Operation -- Maximum
(at full oil level) all directions: 25 deg.
Ignition:
Spark Plug Type: (Champion) RC12YC
Spark Plug Gap: . . . 1.02 mm (.40 in.)
Spark Plug Torque: . 24.4/29.8 N*m
(18/22 ft.lbs.)
Oil Filter Torque: . . . 5.7/9.0 N*m
(50/80 in.lbs.)
Engine Oil Type:
API (American Petroleum Institute)
Service Class SF, SG, or SH.
Viscosity based on air temperature
10W-30 from 0-100+ deg. F.
Fuel Type:
Clean, fresh unleaded gasoline
with an octane rating of 87 or higher
CH22 precleaner: . . . Kohler #24 083 02
CH25 Precleaner: . . . Kohler #24 083 05
CH22 Air Filter: . . . . . Kohler #47 083 03
CH25 Air Filter: . . . . . Kohler #24 083 03
Oil Filter: . . . . . . . . . . Kohler #12 050 01
Mower Specifications:
Engine: Kohler Command V-Twin
Horsepower: 22 or 25
Models: CH22S OR CH25S
Decks: 52” or 61”
Cutting Height: 1.5” to 5.0” in 1/2” increments
(38mm to 127mm in 13mm increments)
Blades: 18” - 52” deck
21” - 61” deck
Deck Engagement: Warner Electro-magnetic
Maintenance-free clutch
Hydrostatic Drive: dual Sunstrand/Hydro
Gear pumps and Ross wheel drive motors
Hydraulic Oil Capacity: 2 gal. (7.6 L)
20W-50 oil, nylon reservoir
Electrical System: 12 volt with
15 amp charging system
Speed Range: Infinitly variable 0-9.0 mph
(14.6 kph) forward, 0-4.0 mph (6.4 kph)
reverse
Fuel Capacity: 10 gal. (30 liters) - twin 5 gal.
polyethylene saddle tanks
Front Tires: 4 ply 13 x 5.00 - 6 tubless pne-
matic
Drive Tires: 4 ply 23 x 10.5 - 12 tubless pne-
matic turf tread
Tread Width: 41”
Overall Height: 43.5”
Overall Length: 79”
Overall Width 52” Deck: 53” (chute down) 63”
Overall Width 61” Deck: 62” (chute down) 72”
Weight with 52” Deck: 1045 lbs.
Weight with 61” Deck: 1065 lbs.
Standard features: Hydraulic oil cooler
Park brake
Engine hour meter
Models: ZKH52222 . . . 22hp 52” Deck
ZKH52252 . . . 25hp 52” Deck
ZKH61252 . . . 25hp 61” Deck
Hydraulic Oil specifications: API 20W-50 SF
or CD motor oil with a minimum of .125%
zinc anti-wear additive. Viscosity 50 sus.
Minimum operating temperature -20 deg. F.,
compatible to BUNA-N seals.
SPECIFICATIONS