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Kohler Command CH15S Specs
The Kohler CH15/CH15S is a 426 cc (26.0 cubic inches) single-cylinder
air-cooled four-stroke internal combustion gasoline engine from the
Command PRO series, manufactured by Kohler Co.
The Kohler CH15 engine has an OHV (overhead valve) design, an aluminum
block with cast iron cylinder liners, a horizontal PTO-shaft,
full-pressurized lubricating system. The engine is equipped with a
carburetor (Nikki or Keihin) with a fixed main jet and dependable
electronic magneto ignition system.
A 90.0 mm (3.54 in) cylinder bore and 67.0 mm (2.64 in) piston stroke
provide a total engine displacement of 426 cc. The compression ratio
rating is 8.5:1.
The engine produced 15.2 PS (11.2 KW; 15.0 HP) at 3,600 rpm of
horsepower and 34.3 Nm (3.5 kgm; 25.3 ft-lb) at 2,400 rpm of maximum
torque.
Engine code identification:
C - Command series,
H - Horizontal PTO shaft,
15 - Horsepower.
S - Electric start,
ST - Electric/Retractable start.
| General Technical Data |
Engine Model .............. Kohler Command CH15S
Engine Type .............. 4-cycle 1-cylinder horizontal shaft air-cooled gasoline engine
Number of Cylinders .............. 1
Displacement, cc (cu.in) .............. 426 (26.0)
Engine Bore, mm (in) .............. 90.0 (3.53)
Engine Stroke, mm (in) .............. 67.0 (2.64)
Maximum Engine Power, hp (kW) .............. 15.0 (11.2)
Maximum Engine Speed, rpm .............. 3600
Maximum Torque, Nm (ft-lb) .............. 34.3 (25.3)
Torque Speed, rpm .............. 2400
Idle Speed, rpm .............. 1400
Compression Ratio .............. 8.5:1
Lubrication System .............. Full pressure
Oil Filter Type .............. Full-flow
Air Cleaner Type .............. Replaceable, paper element
Ignition System .............. Electronic magneto
Starting System .............. Electric starter
Electrical System Rating, Volts .............. 12
| Fuel System |
Fuel System Type .............. Carburetor
Carburetor Model .............. Walbro or Nikki
Carburetor Type .............. Adjustable main jet or fixed jet
Fuel Pump Type .............. Mechanical
Fuel Filter Type .............. In-line
Governor Type .............. Mechanical
| Dimensions and Weight |
Overall Length, mm (in) .............. 344 (13.6)
Overall Width, mm (in) .............. 503 (19.8)
Overall Height, mm (in) .............. 448 (17.7)
Net weight, kg (lbs) .............. 40.0 (88)
| Cylinder Block |
Cylinder Bore Inside Diameter (Std), mm (in) .............. 90.000-90.025 (3.5433-3.5442)
Cylinder Bore Inside Diameter (Max), mm (in) .............. 90.063 (3.5457)
Cylinder Bore (Max. Out of Round), mm (in) .............. 0.12 (0.0047)
Cylinder Bore Max. Taper, mm (in) .............. 0.05 (0.0020)
Crankshaft End Play (Free), mm (in) .............. 0.0575-0.4925 (0.0022-0.0193)
Crankshaft Bore (Crankcase), mm (in) .............. 44.965-45.003 (1.7703-1.7718)
Crankshaft Bore (Closure Plate), mm (in) .............. 41.960-42.035 (1.6519-1.6549)
Crankshaft Bore to Crankshaft Clearance, mm (in) .............. 0.025-0.120 (0.00098-0.00472)
Connecting Rod to Crankpin Clearance, mm (in) .............. 0.030-0.055 (0.0012-0.0022)
Connecting Rod to Crankpin Side Clearance, mm (in) .............. 0.18-0.41 (0.007-0.016)
Connecting Rod to Piston Pin Clearance, mm (in) .............. 0.015-0.028 (0.0006-0.0011)
Connecting Rod Journal Outside Diameter, mm (in) .............. 38.958-38.970 (1.5338-1.5343)
Camshaft End Play, mm (in) .............. 0.0875-0.3925 (0.0034-0.0154)
Camshaft Clearance, mm (in) .............. 0.025-0.105 (0.00098-0.0041)
Camshaft Bore Inside Diameter, mm (in) .............. 20.000-20.025 (0.7874-0.7884)
Camshaft Bearing Outside Diameter, mm (in) .............. 19.962-19.975 (0.7859-0.7864)
| Cylinder Head and Valves |
Cylinder Head (Max Out of Flatness), mm (in) .............. 0.076 (0.003)
Hydraulic Valve Lifter to Crankcase Clearance, mm (in) .............. 0.0124-0.0501 (0.0005-0.0020)
Valve Stem to Valve Guide Clearance (Intake), mm (in) .............. 0.038-0.076 (0.0015-0.0030)
Valve Stem to Valve Guide Clearance (Exhaust), mm (in) .............. 0.050-0.088 (0.0020-0.0035)
Valve Guide Inside Diameter, mm (in) .............. 7.038-7.058 (0.2771-0.2779)
Valve Minimum Lift (Intake), mm (in) .............. 8.96 (0.353)
Valve Minimum Lift (Exhaust), mm (in) .............. 9.14 (0.360)
Valve Face Angle, degrees .............. 45
Valve Seat Angle, degrees .............. 89
Valve Insert Outside Diameter (Intake), mm (in) .............. 37.987-38.013 (1.5015-1.5024)
Valve Insert Outside Diameter (Exhaust), mm (in) .............. 34.013-33.987 (1.3443-1.3434)
Valve Guide Depth, mm (in) .............. 6.50 (0.2559)
Valve Head Diameter (Intake), mm (in) .............. 35.63-35.37 (1.4083-1.3980)
Valve Head Diameter (Exhaust), mm (in) .............. 31.63-31.37 (1.2502-1.2399)
Valve Stem Diameter (Intake), mm (in) .............. 6.982-7.000 (0.2749-0.2756)
Valve Stem Diameter (Exhaust), mm (in) .............. 6.970-6.988 (0.2744-0.2751)
| Piston and Piston Rings |
Piston Outside Diameter (Std), mm (in) .............. 89.951-89.969 (3.5413-3.5420)
Piston Outside Diameter (Wear Limit), mm (in) .............. 89.824 (3.5363)
Piston to Cylinder Bore Clearance, mm (in) .............. 0.031-0.043 (0.0012-0.0016)
Piston to Piston Pin Clearance, mm (in) .............. 0.006-0.017 (0.0002-0.0007)
Piston Pin Bore Inside Diameter, mm (in) .............. 19.006-19.012 (0.7483-0.7485)
Piston Pin Outside Diameter, mm (in) .............. 18.995-19.000 (0.7478-0.7480)
Top Ring Groove Clearance, mm (in) .............. 0.060-0.105 (0.0023-0.0041)
Second Ring Groove Clearance, mm (in) .............. 0.040-0.072 (0.0016-0.0028)
Oil Ring Groove Clearance, mm (in) .............. 0.176-0.026 (0.0069-0.0010)
Top Ring End Gap, mm (in) .............. 0.27-0.51 (0.010-0.020)
Second Ring End Gap, mm (in) .............. 0.27-0.51 (0.010-0.020)
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| Engines Technical Specifications |