Harbor Freight Tools Gas Powered Two-Stage Air Compressor 67853 - Manual (Page 25)

Page 2 For Engine technical questions, please call 1-800-520-0882. Horizontal Engines
Specifications
Description 68120, 68121 68136 68306
Displacement 212cc 346cc 420cc
Engine Type Horizontal Single Cylinder 4 stroke OHV
Cooling System Forced air cooled
Fuel
Type 87+ octane unleaded gasoline
Capacity 1 Gallon 1 Gallon 1 Gallon
Engine Oil
Type SAE
10W-30 above 32° F
5W30 at 32° F or below
Capacity 0.5 Quart 1.16 Quart 1.16 Quart
Run Time @ 50% Load
with full tank
3 hr.
Sound Level at 22 feet 104 dB 108 dB 108 dB
Bore x Stroke 70 mm x 55 mm 83 mm x 64 mm 90 mm x 66 mm
Compression Ratio 8.5:1
Rotation viewed from PTO
(power takeoff - the output shaft)
Counterclockwise
Shaft
Shaft 3/4″ x 2.41″ 1″ x 3.48″ 1″ x 3.48″
Keyway 3/16″ (4.76 mm) 1/4″ (6.35 mm) 1/4″ (6.35 mm)
End Tapped 5/16″ - 24 UNF 3/8″ - 24 3/8″ - 24
Spark Plug
Type
NGK ® BP-6ES
NHSP ® / Torch ® F6TC
NHSP ® / Torch ® F6TC NHSP ® / Torch ® F6TC
Gap 0.7 - 0.8 mm
Valve Clearance
Intake 0.10 - 0.15 mm
Exhaust 0.15 - 0.20 mm
Speed Idle 1,800 ± 50 RPM