The Honda GD411 is a 411 cc, (25.1 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small diesel engine with a horizontal shaft, manufactured by Honda Motor Company for general-purpose applications.
It has an 82.0 mm (3.23 in) cylinder bore and 78.0 mm (3.07 in) piston stroke. The compression ratio rating is 19.4:1 for the B-type engine, 20.0:1 for the North American engine version, and 18.2:1 for the others.
This engine produced 9.1 PS (6.7 kW; 9.0 HP) at 3,600 rpm of horsepower for S,Q,V,P,E types, 7.5 PS (5.5 KW; 7.4 HP) at 3,000 rpm for B-type and 8.7 PS (6.4 KW; 8.6 HP) at 1,800 rpm for L-type engine.
The Honda GD411 features:
- OHV design
- Zexel PFRIKX fuel injection pump
- Zexel DLLA-P injection nozzle
- Centrifugal governor
- Forced spray lubrication system
- Forced air cooling system
- Recoil starter, starter motor
General information
| Engine Specifications | |
| Engine model | GD411 |
| Engine type | 4-stroke, OHV, single-cylinder |
| Displacement | 411 cm3, (25.1 cu·in) |
| Max. horsepower |
S,Q,V,P,E: 9.1 PS (6.7 kW; 9.0 HP) at 3,600 rpm B: 7.5 PS (5.5 KW; 7.4 HP) at 3,000 rpm L: 8.7 PS (6.4 KW; 8.6 HP) at 1,800 rpm |
| Max. torque |
S,Q,V,P,E: 20.6 N·m (2.1 kg·m, 15.19 ft·lb) at 2,500 rpm B: 19.6 N·m (2.0 kg·m, 14.5 ft·lb) at 1,800 rpm L: 40.2 N·m (4.1 kg·m, 30 ft·lb) at 1,250 rpm |
| Cooling system | Forced air |
| Air cleaner | Dual type and cyclone |
| Lubricating system | Forced spray |
| Fuel system | Zexel PFRIKX fuel injection pump and Zexel DLLA-P injection nozzle |
| Fuel consumption | 180-190 g/HPh |
| Fuel tank capacity | 4.6 L (1.22 US. gal. 1.01 Imp. gal.) |
| Fuel used | Diesel fuel |
| Starting system | Recoil starter, starter motor |
| Stoping system | Ignition primary circuit ground |
| Governor | Centrifugal governor |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | 440 x 405 x 490 mm (17.3 x 15.9 x 19.3 in) |
| Dry weight | 54.0 kg (119 lbs) |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 18.2:1, 19.4:1 or 20.0:1 |
| Cylinder bore: | 82.0 mm (3.23 in) |
| Piston stroke: | 78.0 mm (3.07 in) |
| Cylinder internal diameter (standard): | 82.000-82.017 mm (3.2283-3.229 in) |
| Piston skirt outer diameter (standard): | 81.940-81.960 mm (3.226-3.2268 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Connecting rod big end diameter (standard): | 46.000-46.024 mm (1.811-1.812 in) |
| Connecting rod small end diameter (standard): | 23.010-23.028 mm (0.9059-0.9066 in) |
| Side clearance (Top): | 0.085-0.115 mm (0.0033-0.0045 in) |
| Side clearance (Second): | 0.075-0.110 mm (0.003-0.0043 in) |
| Side clearance (Oil): | 0.020-0.055 mm (0.0008-0.0022 in) |
| Ring end gap (Top): | 0.250-0.400 mm (0.0098-0.0157 in) |
| Ring end gap (Second): | 0.250-0.400 mm (0.0098-0.0157 in) |
| Ring end gap (Oil): | 0.200-0.400 mm (0.0079-0.0157 in) |
| Ring width (Top): | 1.960-1.975 mm (0.0772-0.0778 in) |
| Ring width (Second): | 1.950-1.970 mm (0.0768-0.0776 in) |
| Ring width (Oil): | 3.970-3.990 mm (0.1563-0.1571 in) |
| Crankshaft main journal diameter: | 49.970-49.994 mm (1.9673-1.9683 in) |
| Crankpin journal diameter: | 42.976-43.000 mm (1.692-1.6929 in) |
| Crankshaft center distance: | 39.000 mm (1.535 in) |
| Cylinder head | |
| Valve arrangement: | OHV |
| Valves: | 2 |
| Valve steam diameter (INTAKE): | 6.575-6.590 mm (0.2589-0.2594 in) |
| Valve steam diameter (EXHAUST): | 6.540-6.550 mm (0.2575-0.2579 in) |
| Valve spring free length (INTAKE): | 33.7 mm (1.3268 in) |
| Valve spring free length (EXHAUST): | 33.7 mm (1.3268 in) |
| Camshaft lobe height (INTAKE): | 41.022 mm (1.615 in) |
| Camshaft lobe height (EXHAUST): | 41.022 mm (1.615 in) |
Tightening torque specs
| Tightening torque specs | |
| Cylinder head bolts | 43 Nm; 4.3 kg·m; 31 ft·lb |
| Cylinder head nuts | 11 Nm; 1.1 kg·m; 8 ft·lb |
| Rocker arm shaft nuts | 11 Nm; 1.1 kg·m; 8 ft·lb |
| Tappet adjusting nuts | 9 Nm; 0.9 kg·m; 6.5 ft·lb |
| Oil pan bolt bolts |
M11: 71 Nm; 7.1 kg·m; 51 ft·lb M8: 22 Nm; 2.2 kg·m; 16 ft·lb |
| Connecting rod cap nuts | 32 Nm; 3.2 kg·m; 23 ft·lb |
| Relief valve | 33 Nm; 3.3 kg·m; 24 ft·lb |
| Drain plug bolt | 33 Nm; 3.3 kg·m; 24 ft·lb |
| Flywheel nut | 250 Nm; 25.0 kg·m; 180 ft·lb |
| Injection nozzle | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Air breather joint nuts | 18 Nm; 1.8 kg·m; 13 ft·lb |
| Fuel injection pump bolts | 22 Nm; 2.2 kg·m; 16 ft·lb |
| Fuel joint bolts | 28 Nm; 2.8 kg·m; 20 ft·lb |
| Air breather bolt | 18 Nm; 1.8 kg·m; 13 ft·lb |
| Fuel pipe nuts | 20 Nm; 2.0 kg·m; 14 ft·lb |
| Muffler nuts, bolts | 22 Nm; 2.2 kg·m; 16 ft·lb |
| Fuel tank bolts | 11 Nm; 1.1 kg·m; 18 ft·lb |
| Fuel filter bolts | 11 Nm; 1.1 kg·m; 18 ft·lb |
| Drain bolt | 11 Nm; 1.1 kg·m; 18 ft·lb |
Service Data
| Engine | |
| Maximum speed: | 3,700±150 rpm |
| Idle speed: | 1,450±150 rpm |
| Cylinder compression: | 26.0 kg/cm2 (370 psi) at 300 rpm |
| Valve clearance | |
| Intake valve clearance: | 0.13-0.17 mm (0.0051-0.0067 in) |
| Exhaust valve clearance: | 0.13-0.17 mm (0.0051-0.0067 in) |
| Oil system | |
| Lubrication system: | Forced spray |
| Oil type: | Diesel oil (API CC or CD) |
| Recommended oil: | SAE 10W-30 |
| Oil capacity: | 1.25 L (1.32 US. qt, 1.1 Imp. qt.) |
| Oil pressure: | 3.9-5.2 kg/cm2 (55.5-74.0 psi) at 3,600 rpm |
| Generator | |
| Resistance | 2.0 ±0.5 Ω |
| Starter motor | |
| Brush length | 14.3-14.7 mm (0.56-0.58 in) |
| Mica depth | 0.4-0.8 mm (0.016-0.031 in) |
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