LCT 79cc - General Specifications

Copyright © 2018 Liquid Combustion Technology, LLC LCT Engine Service Manual: 79, 136, 179, 208, 254, 291, 306, 369, 414 & 420cc 4
General Specifications
Item 79cc 136cc 179cc 208cc 223cc 254cc
Maximum Speed 3850±50rpm 3850±50rpm 3850±50rpm 3850±50rpm 3850±50rpm 3600±50rpm
Idle Speed 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm 2050+/-50rpm
Compression Ratio 8.5:1 8.5:1 8.5:1 8.5:1 8.5:1 8.5:1
Displacement 79cc 136cc 179cc 208cc 223cc 254cc
Compression Release yes yes yes yes yes yes
Cast Iron Sleeve yes yes yes yes yes yes
Bore x Stroke
2.02" x 1.49" (51.4mm
x 38mm)
2.44" x 1.77" (62mm x
45mm)
2.55" x 2.13" (65mm x
54mm)
2.76" x 2.13" (70mm x
54mm)
70x58
2.99" x 2.2" (76mm x
56mm)
PTO Rotation
CCW (measured from
PTO side)
CCW (measured from
PTO side)
CCW (measured from
PTO side)
CCW (measured from
PTO side)
CCW (measured from
PTO side)
CCW (measured from
PTO side)
Fuel
(DO NOT USE E85)
regular unleaded
gasoline
regular unleaded
gasoline
regular unleaded
gasoline
regular unleaded
gasoline
regular unleaded
gasoline
regular unleaded
gasoline
Low Oil Shutoff if equipped if equipped if equipped if equipped yes if equipped
Fuel Shutoff Valve yes yes yes yes yes yes
Oil Fill Capacity 13oz 16oz 16oz 16oz 16oz 20oz
Spark Plug Gap
0.7-0.8mm (.027-.030
in.)
0.7-0.8mm (.027-.030
in.)
0.7-0.8mm (.027-.030
in.)
0.7-0.8mm (.027-.030
in.)
0.7-0.8mm (.027-.030
in.)
0.7-0.8mm (.027-.030
in.)
Ignition Air Gap
(At Flywheel)
0.4 +/- 0.2mm 0.4 +/- 0.2mm 0.4 +/- 0.2mm 0.4 +/- 0.2mm 0.4 +/- 0.2mm 0.4 +/- 0.2mm
Valve Adjustment
(gap) Intake
.11 +/- .02mm (.003-
.005in)
.15 +/- .02mm (.005-
.007in)
.15 +/- .02mm (.005-
.007in)
.15 +/- .02mm (.005-
.007in)
.15 +/- .02mm (.005-
.007 in.)
.15 +/- .02mm (.005-
.007in)
Valve Adjustment
(gap) Exhaust
.13 +/- .02mm (.004-
.006 in.)
.20 +/- .02mm (.007-
.009 in.)
.20 +/- .02mm (.007-
.009 in.)
.20 +/- .02mm (.007-
.009 in.)
.20 +/- .02mm (.007-
.009 in.)
.20 +/- .02mm (.007-
.009 in.)
Dry Weight
(Summer Engines)
22.72 lbs. (10.3kg) 31 lbs. (14.1kg) 35 lbs. (16.6kg) 35 lbs. (16.6kg) 35 lbs. (16.8kg) NA
Dry Weight
(Winter - Gen II / PW2)
NA 38 lbs. (17.3kg) 42 lbs. (19.1kg) 42 lbs. (19.1kg) 42 lbs. (19.3kg) 45.23 lbs. (20.5kg)
Dry Weight (Winter
- PW3)
NA 30 lbs. (13.6kg) 36 lbs. (16.4kg) 36 lbs. (16.4kg) NA NA