Once again Honda is leading the way when it comes to small engine technology and the all-new iGX series showcases just that. The new ECU (electronic control unit) with a self-tuning regulator governing system monitors and controls the engine function according to load and performance. This includes controlling the throttle, choke, and ignition timing so that you can get the optimum performance out of your engine. This allows the unit to self-adjust the engine speed to meet current load conditions as they are not always set and can change at any given instance, the iGX engine can self-adjust with these conditions to accommodate this. This is why this particular engine is most commonly found on machines such as pressure washers and generators where the load can frequently change.
Among these features, you will also see variable ignition timing, increased compression ratio, reduced noise pollution, increased fuel efficiency by up to 12%, and much more. Not only does this result in a more efficient product it also increases its power output by 6% making it one of the most powerful small engines in its class.
Underneath all of this, you can still see the cornerstone features which made the Honda GX390 so great. This includes smooth in operation with a forged steel crankshaft, helical-cut gears, and an improved camshaft and muffler that reduces overall engine noise. Protected by an oil alert and an improved air filtration system that increases the service life by up to 50% increase the durability of this engine.
A cast-iron cylinder bore means it can withstand long hours of use in some of the harshest conditions.
Specifications
| Engine | Air-cooled 4-stroke OHV |
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| Bore x Stroke | 88 X 64 mm |
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| Displacement | 389 cm3 |
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| Net Power Output* | 11.7 HP (8.7 kW) @ 3,600 rpm |
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| Net Torque | 19.5 lb-ft (26.4 Nm) @ 2,500 rpm |
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| PTO Shaft Rotation | Counterclockwise (from PTO shaft side) |
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| Compression Ratio | 8.2:1 |
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| Carburetor | Horizontal type butterfly valve |
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| Ignition System | Digital CDI with variable ignition timing |
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| Starting System | Recoil/electric |
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| Lubrication System | Splash |
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| Governor System | Electric STR (Self Tuning) |
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| Air Cleaner | Dual element |
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| Oil Capacity | 1.1 L |
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| Fuel Tank Capacity | 6.1 L |
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| Fuel | 37 kg |
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| Dimensions | 407 x 485 x 449 (mm) l x w x h |
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| Charging Coil AMPS | 2.9 |
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| Shaft | 1inch straight / keyway |
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| Bore | Cast Iron |
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Features
| ADVANCED TECHNOLOGY
Integrated ECU (electronic control unit) with a self-tuning regulator (STR) governor system. Engine senses and adjusts RPMs to match the application's load and speed requirements. ECU enables drive-by-wire remote control operation of the engine and regulates functions such as throttle position. |
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| FUEL EFFICIENT OPERATION
Fuel economy is increased by approximately 15% over a similar conventional engine. Auto Throttle. |
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| HIGH POWER OUTPUT
Electronic governor minimizes governor droop, increasing available power. Allows the engine to respond significantly faster to the load |
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| SMOOTH PERFORMANCE
ECU fine tunes the throttle position to maintain a precise engine speed. Precision engineered components result in lower vibration |
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| EXCEPTIONALLY QUIET
Enhanced muffler design reduces overall engine noise Large capacity, multi-chamber exhaust system. Reduced mechanical noise due to higher compression and piston design. Forged steel crankshaft and rigid crankcase |
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| PROVEN RELIABILITY
Long-life air filter. Multi-function Oil Alert Honda’s Oil Alert system helps to prevent engine seizure due to a low oil condition. The system consists of an oil level sensor inside the crankcase. When the oil reaches a level that is too low for safe operation, the engine warns you or stops automatically. |
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| EASY TO USE AND MAINTAIN
No manual manipulation of the choke or throttle - Easier for inexperienced users to operate. Wide fuel filler opening with ratchet-type fuel cap. Easy maintenance - ideal for rental applications Easy access connectors for flexible connection of remote control and for. ECU programming. Externally serviceable Oil Alert |
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| EASY STARTING
Auto Choke Low effort recoil starter with automatic decompression Camshaft profile is optimized for easy starting. Large diameter recoil starter assembly. Automotive-style ignition coil on spark plug Digital CDI with higher spark plug voltage. |
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