The Honda iGX440 is a 0.44 l (438 cc, 26.7 cu·in) single-cylinder air-coolled 4-stroke internal combustion small gasoline (petrol) engine with horizontal shaft, manufactured by Honda Motor for general-purpose applications, such as pressure washers, generators, forestry equipment, construction and industrial equipment, agricultural equipment, water pumps.
The iGX440 engine has STR (Self Tuning Regulator) governor, digital C.D.I.(Capacitor Discharge Ignition), horizontal type butterfly valve carburetor and recoil or electric starter motor. The iGX440 cylinder bore is 88.0 mm (3.46 in) and piston stroke is 72.1 mm (2.84 in), compression ratio rating is 8.1:1.
The Honda iGX440 produces 12.7 HP (9.5 kW; 12.9 PS) at 3,600 rpm net power and 29.8 N·m (3.0 kgf·m, 22.0 lb·ft) at 2500 rpm of net torque.
General information
| Engine Specifications | |
| Model | iGX440 |
| Type | 4-stroke, OVH, single cylinder, inclined by 25° |
| Displacement | 438 cm 3 (26.7 cu·in) |
| Max. horsepower | 12.7 HP (9.5 kW; 12.9 PS) at 3600 rpm |
| Max. torque | 29.8 N·m (3.0 kgf·m, 22.0 lb·ft) at 2500 rpm |
| Carburetor | Horizontal type, butterfly valve |
| Cooling system | Forced-air |
| Ignition system | Digital C.D.I.(Capacitor Discharge Ignition) with variable ignition timing |
| Lubricating system | Forced splash |
| Starting system | Recoil and Starter motor |
| Stoping system | Ignition exciter coil circuit open |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel consumption | 3.5 Liters (0.92 US gal, 0.77 Imp gal) / h |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Cylinder Block and Head
The Honda iGX440 has cast iron cylinder sleeve, ball bearing supported crankshaft, improved piston design, heavy-duty balancer shaft. The piston has two compression rings and one oil ring. Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficiency. The engine has integrated ECU (electronic control unit) with a self-tuning regulator (STR) governor system.
| Cylinder block | ||
| Compression ratio: | 8.1:1 | |
| Bore x Stroke | 88 X 72.1 mm (3.5 x 2.84 in) | |
| Sleeve internal diameter | 88.000-88.017 mm (3.4646-3.4652 in) | |
| Piston skirt outer diameter | 87.985-87.965 mm (3.4640-3.4632 mm) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Ring side clearance | Top | 0.030-0.050 mm (0.0012-0.0022 in) | Second | 0.030-0.050 mm (0.0012-0.0022 in) |
| Ring end gap | Top | 0.20-0.35 mm (0.008-0.014 in) | Second | 0.35-0.50 mm (0.014-0.020 in) |
| Ring width | Top | 1.490-1.475 mm (0.0587-0.0581 in) |
| Second | 1.490-1.475 mm (0.0587-0.0581 in) | |
| Piston pin outer diameter | 20.994-21.000 mm (0.8265-0.8268 in) | |
| Connecting rod small end inner diameter | 20.994-21.000 mm (0.8265-0.8268 in) | |
| Connecting rod big end inner diameter | 40.039-40.025 mm (1.5763-1.5758 in) | |
| Crankpin outer diameter | 39.975-39.985 mm (1.5738-1.7542 in) | |
| Cylinder Head | ||
| Warpage (limit) | 0.10 mm (0.004 in) | |
| Valve Arrangement: | OHV | |
| Valves: | 2 | |
| Stem outer diameter (standard): | INTAKE | 5.478-5.490 mm (0.2157-0.2161 in) |
| EXHAUST | 5.435-5.450 mm (0.2140-0.2146 in) | |
| Valve spring free length: | 46.3 mm (1.82 in) | |
| Cam height: | INTAKE | 30.736-31.136 mm (1.2101-1.2258 in) |
| EXHAUST | 30.145-30.545 mm (1.1868-1.2026 in) | |
| Camshaft outer diameter: | 21.470-21.500 mm (0.8453-0.8465 in) | |
Tightening torque specs
| Tightening torque specs | |
| Connecting rod bolt | 14 Nm; 1.4 kg·m; 10 ft·lb |
| Cylinder head bolt | 35 Nm; 3.5 kg·m; 25 ft·lb |
| Flywheel nut | 165 Nm; 16.8 kg·m; 122 ft·lb |
| Bearing holder bolt | 26 Nm; 2.6 kg·m; 19 ft·lb |
| Crankcase cover bolt | 24 Nm; 2.4 kg·m; 17 ft·lb |
| Cam pulley bolt | 16 Nm; 1.6 kg·m; 12 ft·lb |
| Rocker arm shaft bolt | 23 Nm; 2.3 kg·m; 17 ft·lb |
| Starter motor nut | 8.8 Nm; 0.9 kg·m; 6.5 ft·lb |
| Standard torque values | |
| Bolt, nut (5 mm) | 5.5 Nm; 0.55 kg·m; 4.0 ft·lb |
| Bolt, nut (6 mm) | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Bolt, nut (8 mm) | 24 Nm; 2.4 kg·m; 17 ft·lb |
| Bolt, nut (10 mm) | 37.5 Nm; 3.75 kg·m; 27 ft·lb |
| Bolt, nut (12 mm) | 55 Nm; 5.5 kg·m; 40 ft·lb |
Maintenance data
| Engine | |
| Maximum speed | 3,600 ± 150 rpm |
| Idle speed | 1,400 ± 150 rpm |
| Cylinder compression | 4-7 kg/cm2 (57-100 psi, 0.39-0.68 MPa) at 600 rpm |
| Valve clearance | |
| Intake valve | 0.15 ± 0.02 (0.006 ± 0.001) |
| Exhaust valve | 0.20 ± 0.02 (0.008 ± 0.001) |
| Oil system | |
| Oil type | Honda 4-stroke or an equivalent (SE or later) |
| Recommended oil | SAE 10W-30 |
| Oil capacity | 1.1 L (1.16 US gal, 0.97 lmp qt) |
| Carburetor | |
| Main jet | #112 |
| Float height | 13.2 mm (0.52 in) |
| Pilot screw opening | 1-5/8 turns out |
| Ignition system | |
| Ignition timing | B.T.D.C. 10° / 1,400 rpm |
| Spark plug | NGK: BKR7E-E DENSO: K22PR-UR |
| Spark plug gap | 0.7-0.8 mm (0.028-0.031 in) |
Author:
Igx440 need a price on a Honda engine
We are not a trading company
no trading here just SPECS! sheeeesh
I got one that needs a lil work if your interested
5052044991
Hello wondering if u have had any problems with the ecu on this engine ? I brought two new ecu for this motor and they don’t rev 🙁 it’s not the machine as the ecu I had before I brought the two new one worked fine
Hey Dale, the ECU’s need to be programmed at Honda when you buy them, they are blank from the factory.