Koehler K90901 Combination Octane Rating Unit Engine (120 Octane Number)
Conforms to the specifications of: ASTM D2699, ASTM D2700; ISO 5163, ISO 5164, IP 236, IP 237
Working Range: Up to 120 Octane Number
Operation Conditions:
Cylinder Jacket Coolant Temperature: 100 °C ± 1.5 °C (212 °F ± 3 °F)
Crankcase Oil Temperature: 57 °C ± 8.5 °C (135 °F ± 15 °F)
MON Conditions:
Engine Speed: 900 ± 9 rpm
Ignition Timing: Variable as cylinder height is changed
Intake Air Temperature: 38 °C ± 1 °C (100 °F ± 5 °F)
Intake Mixture Temperature: 149 °C ± 1 °C (300 °F ± 2 °F)
RON Conditions:
Engine Speed: 600 ± 6 rpm
Ignition Timing: 13° BTDC
Intake Air Temperature: 52 °C ± 1 °C (125 °F ± 2 °F)
Engine Information:
Compression Ratio (C.R.): 4:1 - 18:1
Cylinder Bore (diameter): 82.55 mm (3.250")
Stroke: 114.30 mm (4.50")
Carburetor Venturi (Research): 14.30 mm (9/16")
Intake Valve Clearance (Hot): 0.20 mm ± 0.025 mm (0.008" ± 0.001")
Exhaust Valve Clearance: 0.20 mm ± 0.025 mm (0.008" ± 0.001")
Intake Valve Opens Timing: 10° ± 2.5° ATDC
Intake Valve Closes Timing: 34° ABDC
Exhaust Valve Opens Timing: 40° BBDC
Exhaust Valve Closes Timing: 15° ± 2.5° ATDC
Crankcase Oil Pressure: 172 kPa - 207 kPa (25 psi to 30 psi)
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