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1. Weichai America Corp.
WP13GTA
Std Metric
Basic Data
Type
Number of cylinders
Aspiration
Bore in mm 5.0 127.00 5.0 127
Stroke in mm 6.5 165.00 6.5 165
Displacement in^3 L 764.9 12.540 764.9 12.54
Lambda
Compression Ratio
Mean Piston Speed ft/min m/s 1624.0 8.25 1948.8 9.900
Rotation Viewed from Flywheel
Firing Order
Gross Standby Power Rating1,2,3
Per ISO 3046 at the Flywheel
NG HP kW 335.3 250.0 401.3 299.3
LP HP kW 202.4 150.9 242.0 180.5
MEP (@ rated Load on NG) psi bar 110.0 15.9 234.3 15.9
MEP (@ rated Load on LP) psi bar 66.4 9.6 140.5 9.6
Thermal Balance
Total Fuel Ft
3
/hr kg/hr 2732.0 55.5 3416.3 69.40
Heat to Work btu/min kW 14217.3 250.0 17072.1 300.20
Heat rejected to Cooling water at rated Load btu/min kW 13023.0 229.0 16298.7 286.60
Heat Rejection per CAC btu/min kW 1933.6 34.0 2144.0 37.70
Heat Rejected to Exhaust (LHV TO 77oF) btu/min kW 11373.8 200.0 14592.6 256.60
Enigne Radiated Heat btu/min kW 1080.5 19.0 2462.4 43.30
Gross Prime Power Rating1,2,3
Per ISO 3046 at the Flywheel
NG HP kW 313.9 234.1 327.9 244.5
LP HP kW 202.4 150.9 242.1 180.5
MEP (@ rated Load on NG) psi bar 103.0 14.9 89.6 13.0
MEP (@ rated Load on LP) psi bar 66.4 9.6 66.2 9.6
Thermal Balance
Total Fuel Ft3
/hr kg/hr 2549.9 51.8 2766.5 56.2
Heat to Work btu/min kW 11942.5 210.0 13642.9 239.9
Heat rejected to Cooling water at rated Load btu/min kW 11373.8 200.0 13705.5 241
Heat Rejection per CAC btu/min kW 1592.3 28.0 2144.0 37.7
Heat Rejected to Exhaust (LHV TO 77oF) btu/min kW 10293.3 181.0 11538.8 202.9
Engine Radiated Heat btu/min kW 1217.0 21.4 2269.1 39.9
Weight and Power Output
Dry Weight
Fan to Flywheel lb kg 2312.8 1050 2312.8 1050
Rad to Flywheel lb kg 3017.6 1370 3017.6 1370
Wet Weight
Fan to Flywheel lb kg 2422.9 1100 2422.9 1100
Rad to Flywheel lb kg 3237.9 1470 3237.9 1470
Maximum Allowable Bending Moment at Rear of Block lb ft N m 8237.9 11170 8237.9 11170
Moment of Inertia About Roll Axis lb ft^2 kg m^2 60.9 44.90 60.9 44.90
Flywheel housing
Flywheel
Number of Flywheel Teeth
Exhaust System
Type
Maximum allowable Back pressure in HG kPa 3.8 15 3.8 15
Standard Catalyst Back pressure in HG kPa 2.2 8.6 2.2 8.6
Exhaust Outlet Pipe Size (Turbo outlet to catalyst inlet) in mm 3.15→3.37 80.00→85.6 3.15→3.37 80.00→85.6
Maximum Turbine Inlet Temperature ℉ ℃ 1549.4 843.0 1549.4 843.0
Exhaust Flow at Rated Power lb/hr kg/hr 2202.6 1000.0 2700.7 1226.1
Air Induction System
Maximum allowable Intake Air Restriction with Air Cleaner
Clean inH2O kPa 12.0 3.0 12.0 3
Dirty inH2O kPa 24.9 6.2 24.9 6.20
12.5 L 201809V2
SAE No.1
No.14
Counter clockwise
1-5-3-6-2-4
No.14
136
Units
1800
N/A
N/A
1500
Specificaiton
Water cooled mainfold
N/A
N/A
136
N/A
N/A
N/A
N/A
in-line 4cycle
6
Turbo charger air cooled
1
9.75
SAE No.1
N/A
N/A
1
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Document Courtesy of Fly Parts Guy Co.
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2. Weichai America Corp.
WP13GTA
Std Metric
12.5 L 201809V2
Units
1800
1500
Specificaiton
Combustion Air required (entire engine) lb/hr kg/hr 2092.5 950.0 2547.8 1156.7
Combustion Air required (entire engine) CFM m^3/min 433.4 12.3 527.6 14.94
Charge Air Cooler
Compressor Outlet Temperature ℉ ℃ 303.8 151.0 326.1 163.4
Compressor Flow Rate per CAC lb/hr kg/hr 2202.6 1000 2700.7 1226.1
CAC Rise over Ambient (Charge)
Specified ℉ ℃ 69.8 21 69.8 21
Acutal ℉ ℃ 64.94 18.3 69.8 21
Max pressure loss across the CAC inH2O kPa 48.2 12 48.2 12
Maximum Intake Air Temperature (IAT) ℉ ℃ 131 55 131 55
ECU IAT Warning ℉ ℃ 169.88 76.6 169.88 76.6
ECU IAT Shutdown ℉ ℃ 180.0 82.2 180.0 82.2
Cooling System
Coolant Capacity
Engine only gal L 5.8 22 5.8 22
Engine with Radiator gal L 20.1 76 20.1 76
Engine Coolant Flow gal/min L/min 89.8 340 158.5 600
Water Pump Speed
Standard Thermostat Range
Cracking Temperature ℉ ℃ 168.8 76 168.8 76
Full Open Temperature ℉ ℃ 190.4 88 190.4 88
Maximum Allowable Pressure Cap psi bar 7.4 0.50 7.4 0.50
Ambient Clearance Open Genset (water) (Air-to-Boil)
Specified ℉ ℃ ≥107 ≥42 ≥107 ≥42
Acutal ℉ ℃ 119 48 111 44
Maximum Allowable Top Tank Temperature ℉ ℃ 208.4 98 208.4 98
ECU Warning ℉ ℃ 220.0 103 220.0 103
ECU Shutdown ℉ ℃ 230.0 110 230.0 110
Fan Power HP kW 13.0 9.7 23.6 17.6
Fan Diameter, including blades in mm 34.0 864 34.0 864
Fan Speed
Electrical System
Minimum Recommended Battery Capacity
Cold Cranking Current
Engine only
Engine with Drive train
Maximum Allowable Resistance of Starting Circuit
Starting Motor Power HP kW 7.4 5.5 7.4 5.5
Battery Charging Alternator
Voltage
Current
Coil primary Resistance
Spark Plug p/n
Spark plug gap
Lubrication System
Oil Specification
Oil Pressure
Idle
Min Psi Bar 36.8 2.50 36.8 2.50
Max Psi Bar 63.2 4.30 63.2 4.30
Rated Speed
Min Psi Bar 51.5 3.50 51.5 3.5
Max Psi Bar 85.3 5.80 80.9 5.5
Maximum Allowable Oil Temperature ℉ ℃ 221.0 105 221.0 105.0
Engine Oil Capacity
Min Qts L 28.0 26.5 28.0 26.5
Max Qts L 31.7 30.0 31.7 30.0
Oil Filter Capacity Qts L 2.7 2.6 2.7 2.6
ECU Oil Pressure Warning psi
ECU Oil Pressure Shut Down psi
mm 0.45-0.5
Ohms
Ohms
Volts
0.002
28
0.45-0.5
CCA
150
70
0.59Ω ± 10%
Bosch R66857
25.0
Amps
Bosch R66857
30.0
30.0
SAE 15W-40 Low Ash Gas engine oil (.25-.5% by wt), API CD/CF or higher
RPM 2286
150
CCA
2921
1905
25.0
900
0.002
28
70
0.59Ω ± 10%
900
900
900
AH
RPM 3505
2
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Document Courtesy of Fly Parts Guy Co.
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3. Weichai America Corp.
WP13GTA
Std Metric
12.5 L 201809V2
Units
1800
1500
Specificaiton
Fuel System
Fuel Consumption
NG Ft
3
/hr kg/hr 2732.0 55.5 3416.3 69.4
LP Ft
3
/hr kg/hr 1870.6 38.0 2433.2 49.4
Maximum EPR Rated Pressure psi kPa 1.0 6.9 1.0 6.9
Maximum Running pressure to Electronic Pressure Regulator (EPR) inH2O kPa 10.8 2.7 10.8 2.7
Minimum Running pressure to EPR inH2O kPa 6.8 1.7 6.8 1.7
Minimum Gas Supply Pipe Size
Maximum EPR Rated Pressure psi kPa 1.0 6.90 1.0 6.90
Maximum Running Pressure to EPR inH2O kPa 10.8 2.70 10.8 2.70
Minimum Running Pressure to EPR inH2O kPa 6.8 1.70 6.8 1.70
Minimum LPG Supply Pipe Size
4
Fuel Consumption Curve @ 1500 RPM (Natural Gas)
Fuel Consumption Curve @ 1500 RPM (Liquid Propane Gas)
1-1/4" NPT
1/4" NPT
0
10
20
30
40
50
60
70
80
150
200
250
300
350
400
450
22.01 55.61 77.75 111.04 132.32 144.51 177.61 203.98 225.40 244.65
Total
Fuel(m³/h)
Power (kW)
BSFC(g/kW.h)
0
5
10
15
20
25
200
250
300
350
400
450
500
550
600
650
700
10 30 50 70 90 110 130 150
Total
Fuel(gal/h)
BSFC(g/kW.h)
Power(kW)
3
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Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com

4. Weichai America Corp.
WP13GTA
Std Metric
12.5 L 201809V2
Units
1800
1500
Specificaiton
Fuel Consumption Curve @ 1800 RPM (Natural Gas)
Fuel Consumption Curve @ 1800 RPM (Liquid Propane Gas)
4
The preceeding pipe sizes are only suggestions and piping sizes may vary with temperature, pressure, distance from supply and application of local codes. Gas must be
available at adequate volume and pressure for engine at the EPR.
1
Standby and overload ratings based on ISO3046.
2
All ratings are gross flywheel horsepower corrected to 77o
F at an altitude of 328 feet with no cooling fan or alternator losses using heating value for NG of 1025 BTU/SCF
(HHV) and for propane of 2490 BTU/SCF (HHV).
3
Production tolerances in engines and installed components can account for power variations of +/- 5%. Altitude, temperature and excessive exhaust and intake
restrictions should be applied to power calculations. Engine maybe operated at : up to 1200 feet and 86°F without power deration. For sustained operation above these
conditions, derate by 2.5% per 1000 feet, and 1.5% per 10°F.
0
10
20
30
40
50
60
70
80
90
100
190
240
290
340
390
440
490
30.2 59.8 74.9 90 120 149.9 180 210 224.8 239.9 270 290.1 299.3
Total
Fuel(m³/h)
Power (kW)
BSFC(g/kW.h)
0
5
10
15
20
25
30
200
250
300
350
400
450
500
550
600
650
700
15 30 45 60 75 90 105 120 135 150 165 180 195
Total
Fuel(gal/h)
BSFC(g/kW.h)
Power(kW)
4
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com

5. Weichai America Corp.
WP13GTA
Std Metric
Basic Data
Type
Number of cylinders
Aspiration
Bore in mm 5.0 127.00 5.0 127
Stroke in mm 6.5 165.00 6.5 165
Displacement in^3 L 764.9 12.540 764.9 12.54
Lambda
Compression Ratio
Mean Piston Speed ft/min m/s 1624.0 8.25 2381.9 12.100
Rotation Viewed from Flywheel
Firing Order
Gross Prime Power Rating
1,2,3
Per ISO 3046 at the Flywheel
NG HP kW 313.9 234.1 292.2 217.9
LP HP kW 202.4 150.9 211.7 157.9
MEP (@ rated Load on NG) psi bar 103.0 14.9 234.3 15.9
MEP (@ rated Load on LP) psi bar 66.4 9.6 140.5 9.6
Thermal Balance
Total Fuel Ft3
/hr kg/hr 2535.1 51.5 2707.4 55.00
Heat to Work btu/min kW 13079.9 230.0 17072.1 217.00
Heat rejected to Cooling water at rated Load btu/min kW 13023.0 229.0 16298.7 247.00
Heat Rejection per CAC btu/min kW 1933.6 34.0 2144.0 28.40
Heat Rejected to Exhaust (LHV TO 77oF) btu/min kW 11373.8 200.0 14592.6 197.50
Engine Radiated Heat btu/min kW 1080.5 19.0 2462.4 28.40
Weight and Power Output
Dry Weight
Fan to Flywheel lb kg 2312.8 1050 2312.8 1050
Rad to Flywheel lb kg 3017.6 1370 3017.6 1370
Wet Weight
Fan to Flywheel lb kg 2422.9 1100 2422.9 1100
Rad to Flywheel lb kg 3237.9 1470 3237.9 1470
Maximum Allowable Bending Moment at Rear of Block lb ft N m 8237.9 11170 8237.9 11170
Moment of Inertia About Roll Axis lb ft^2 kg m^2 60.9 44.90 60.9 44.90
Flywheel housing
Flywheel
Number of Flywheel Teeth
Exhaust System
Type
Maximum allowable Back pressure in HG kPa 3.8 15 3.8 15
Standard Catalyst Back pressure in HG kPa 2.2 8.6 2.2 8.6
Exhaust Outlet Pipe Size in mm 3.15→3.37 80.00→85.6 3.15→3.37 80.00→85.6
Maximum Turbine Inlet Temperature ℉ ℃ 1549.4 843.00 1549.4 843.00
Exhaust Flow at Rated Power lb/hr kg/hr 2015.4 915 2158.6 980.00
Air Induction System
Maximum allowable Intake Air Restriction with Air Cleaner
Clean inH2O kPa 12.0 3.0 12.0 3.0
Dirty inH2O kPa 24.9 6.2 24.9 6.2
Combustion Air required (entire engine) lb/hr kg/hr 1916.3 870.0 2547.8 930.0
Combustion Air required (entire engine) CFM m^3/min 396.9 11.2 527.6 14.9
Charge Air Cooler
Compressor Outlet Temperature ℉ ℃ 293.0 145.0 284.0 140
Compressor Flow Rate per CAC lb/hr kg/hr 2015.4 915 2158.6 980.00
CAC Rise over Ambient (Charge)
Specified ℉ ℃ 69.8 21 69.8 21
Acutal ℉ ℃ 64.94 18.3 67.6 19.8
Max pressure loss across the CAC inH2O kPa 48.2 12 48.2 12
Maximum Intake Air Temperature (IAT) ℉ ℃ 131.0 55 131.0 55
ECU IAT Warning ℉ ℃ 169.9 76.6 169.9 76.6
ECU IAT Shutdown ℉ ℃ 180.0 82.2 180.0 82.2
Counter clockwise
1-5-3-6-2-4
N/A in-line 4cycle
12.5 L 201809V2
Units Specificaiton
1500 2200
N/A 6
N/A Turbo charger air cooled
N/A
N/A
N/A
N/A
N/A SAE No.1 SAE No.1
N/A No.14 No.14
N/A 136 136
Water cooled mainfold
1
9.75
1
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Document Courtesy of Fly Parts Guy Co.
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6. Weichai America Corp.
WP13GTA
Std Metric
12.5 L 201809V2
Units Specificaiton
1500 2200
Cooling System
Coolant Capacity
Engine only gal L 5.8 22 5.8 22
Engine with Radiator gal L 20.1 76 20.1 76
Engine Coolant Flow gal/min L/min 121.5 460 158.5 600
Water Pump Speed
Standard Thermostat Range
Cracking Temperature ℉ ℃ 168.8 76 168.8 76
Full Open Temperature ℉ ℃ 190.4 88 190.4 88
Maximum Allowable Pressure Cap psi bar 7.4 0.50 7.4 0.50
Ambient Clearance Open Genset (water) (Air-to-Boil)
Specified ℉ ℃ ≥107 ≥42 ≥107 ≥42
Acutal ℉ ℃ 122 50 114 46
Maximum Allowable Top Tank Temperature ℉ ℃ 208.4 98 208.4 98
ECU Warning ℉ ℃ 220.0 103 220.0 103
ECU Shutdown ℉ ℃ 230.0 110 230.0 110
Fan Power HP kW 13.0 9.7 42.9 32.0
Fan Diameter, including blades in mm 34.0 864 34.0 864
Fan Speed
Electrical System
Minimum Recommended Battery Capacity
Cold Cranking Current
Engine only
Engine with Drive train
Maximum Allowable Resistance of Starting Circuit
Starting Motor Power HP kW 7.4 5.5 7.4 5.5
Battery Charging Alternator
Voltage
Current
Coil primary Resistance
Spark Plug p/n
Spark plug gap
Lubrication System
Oil Specification
Oil Pressure
Idle
Min Psi Bar 36.8 2.50 36.8 2.50
Max Psi Bar 63.2 4.30 63.2 4.30
Rated Speed
Min Psi Bar 51.5 3.5 51.5 3.5
Max Psi Bar 80.9 5.5 80.9 5.5
Maximum Allowable Oil Temperature ℉ ℃ 221.0 105 221.0 105.0
Engine Oil Capacity
Min Qts L 28.0 26.5 28.0 26.5
Max Qts L 31.7 30.0 31.7 30.0
Oil Filter Capacity Qts L 2.7 2.6 2.7 2.6
ECU Oil Pressure Warning
ECU Oil Pressure Shut Down
Fuel System
Fuel Consumption
NG Ft
3
/hr kg/hr 2535.1 51.5 2707.4 55.0
LP Ft
3
/hr kg/hr 1870.6 38.0 2362.8 48.0
Maximum EPR Rated Pressure psi kPa 1.0 6.9 1.0 6.9
Maximum Running pressure to Electronic Pressure Regulator (EPR) inH2O kPa 10.8 2.7 10.8 2.7
Minimum Running pressure to EPR inH2O kPa 6.8 1.7 6.8 1.7
Minimum Gas Supply Pipe Size
Maximum EPR Rated Pressure psi kPa 1.0 6.90 1.0 6.90
Maximum Running Pressure to EPR inH2O kPa 10.8 2.70 10.8 2.70
Minimum Running Pressure to EPR inH2O kPa 6.8 1.70 6.8 1.70
Minimum LPG Supply Pipe Size
4
AH 150 150
RPM 2921 3505
RPM 1905 2794
CCA 900 900
CCA 900 900
Ohms 0.002 0.002
0.45-0.5 0.45-0.5
Volts 28 28
Amps 70 70
Ohms 0.59Ω ± 10% 0.59Ω ± 10%
mm
psi 30.0 30.0
1/4" NPT
psi 25.0 25.0
1-1/4" NPT
SAE 15W-40 Low Ash Gas engine oil (.25-.5% by wt), API CD/CF or higher
Bosch R66857 Bosch R66857
2
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com

7. Weichai America Corp.
WP13GTA
Std Metric
12.5 L 201809V2
Units Specificaiton
1500 2200
Power Curve vs. Speed (Natural Gas)
Fuel Consumption Curve vs. Speed (Natural Gas)
Power Curve vs. Speed (Liquid Propane Gas )
100
120
140
160
180
200
220
240
260
800
900
1000
1100
1200
1300
1400
1500
1600
900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
Power（kW）
Speed (rpm）
Torque（N.m)
30
40
50
60
70
80
90
200
210
220
230
240
250
260
900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
Total
Fuel（m³/h)
Speed (rpm)
BSFC（g/kW.h）
90
100
110
120
130
140
150
160
170
180
190
650
700
750
800
850
900
950
1000
1050
900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
Power
(kW)
Torque
(N.m)
Speed (rpm)
3
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Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com

8. Weichai America Corp.
WP13GTA
Std Metric
12.5 L 201809V2
Units Specificaiton
1500 2200
Fuel Consumption Curve vs. Speed (Liquid Propane Gas)
Net Power data (Natural Gas)
Speed (RPM) 900 1200 1500 1800 2000 2200
Gross Power (kW) 117.3 183.0 234.1 240.4 230.2 217.9
Fan Power (kW) 0.4 4.8 9.7 17.6 21.2 32.0
Net Power (kW) 116.9 178.2 224.4 222.8 209.0 185.9
Net Power data (Liquid Propane Gas)
Speed (RPM) 900 1500 1800 2200
Gross Power (kW) 90.8 150.9 180.5 157.9
Fan Power (kW) 0.4 9.7 17.6 32.0
Net Power (kW) 90.4 141.2 162.9 125.9
4
The preceeding pipe sizes are only suggestions and piping sizes may vary with temperature, pressure, distance from supply and application of local codes. Gas must
be available at adequate volume and pressure for engine at the EPR.
1
Standby and overload ratings based on ISO3046.
2
All ratings are gross flywheel horsepower corrected to 77o
F at an altitude of 328 feet with no cooling fan or alternator losses using heating value for NG of 1025
BTU/SCF (HHV) and for propane of 2490 BTU/SCF (HHV).
3
Production tolerances in engines and installed components can account for power variations of +/- 5%. Altitude, temperature and excessive exhaust and intake
restrictions should be applied to power calculations. Engine maybe operated at : up to 1200 feet and 86°F without power deration. For sustained operation above
these conditions, derate by 2.5% per 1000 feet, and 1.5% per 10°F.
11
13
15
17
19
21
23
25
27
230
240
250
260
270
280
290
300
310
900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
TotalFuel（gal/h）
BSFC（g/kW.h)
Speed （rpm）
4
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www.FlyPartsGuy.com
Document Courtesy of Fly Parts Guy Co.
www.FlyPartsGuy.com