The Honda iGX800 EFI V-Twin Engine is Honda’s premium commercial engine platform engineered for contractors and OEM builders who demand maximum performance, fuel efficiency, and intelligent engine control. Delivering 24.8 HP from a 779cc V-Twin platform, the iGX800 combines Electronic Fuel Injection (EFI), Honda’s STR Self-Tuning Regulator governor system, and Drive-by-Wire technology to create one of the most advanced small industrial engines available today.
Built for demanding commercial environments, the iGX800 is ideal for pressure washers, industrial sprayers, hydraulic systems, generators, agricultural equipment, and heavy-duty custom skid builds where consistent RPM control and reliable power delivery matter.
Unlike traditional carbureted engines, the iGX800’s EFI system continuously adjusts fuel delivery for optimized performance, improved cold-weather starting, smoother throttle response, and increased fuel efficiency. Honda’s integrated ECU and STR governor system actively monitor engine load and automatically maintain stable RPM under changing demand conditions—making it especially valuable for pressure washer systems where consistent engine speed directly impacts pump performance.
The iGX800 also features premium commercial-grade internals including a forged steel crankshaft, pressure-fed crankshaft bearings, forged steel connecting rods, integrated cylinder heads, oil cooler, spin-on oil filter, and high-capacity cooling system designed for long runtime and demanding commercial use.
For contractors building elite pressure washer systems or industrial equipment where downtime is unacceptable, the Honda iGX800 delivers next-generation performance backed by Honda reliability.
Built for Commercial & Industrial Applications
- Belt-drive pressure washers
- Hot water pressure washer systems
- Industrial spraying equipment
- Hydraulic pumps and systems
- Generators
- Agricultural equipment
- Street sweepers
- Trenchers
- Forestry equipment
- Custom trailer and skid builds
What makes the Honda iGX800 different from a standard GX engine?
The iGX800 features Honda’s advanced Electronic Fuel Injection (EFI) system along with an integrated ECU, STR Self-Tuning Regulator governor, and Drive-by-Wire controls for improved fuel efficiency, automatic RPM management, smoother operation, and intelligent engine diagnostics.
Why is EFI beneficial on a pressure washer system?
Electronic Fuel Injection helps maintain consistent engine performance under varying load conditions while improving fuel efficiency, throttle response, cold-weather starting, and overall operational stability.
What is the STR Governor System?
Honda’s STR (Self-Tuning Regulator) governor system automatically adjusts engine output and RPM based on load demand to help maintain stable performance during operation.
What oil does the Honda iGX800 use?
Honda recommends SAE 10W-30 engine oil for general operation across most temperature ranges.
Electronic Fuel Injection (EFI):
Continuously optimizes fuel delivery for improved efficiency, smoother performance, and easier starting.
24.8 HP Commercial V-Twin Platform:
Delivers strong torque and high-output performance for demanding industrial applications.
STR Self-Tuning Regulator Governor:
Automatically adjusts engine response under changing load conditions.
Drive-by-Wire Control System:
Provides advanced electronic throttle and RPM management capabilities.
Integrated ECU Engine Management:
Monitors engine performance and supports advanced diagnostics and programmable RPM control.
Forged Steel Crankshaft & Connecting Rods:
Built for long-term durability in heavy commercial applications.
Pressure-Fed Crankshaft Bearings:
Helps improve lubrication consistency and engine longevity.
Integrated Oil Cooler:
Reduces oil degradation and helps extend engine life during demanding operation.
Spin-On Oil Filter:
Automotive-style oil filtration simplifies maintenance and improves serviceability.
17-Amp Charging System:
Supports battery charging and accessory power requirements.
LED Diagnostic Indicator:
Allows fast engine diagnostics and troubleshooting.
Full Auto Choke System:
Improves cold-weather starting and simplifies operation.
SAE J1939 CAN Bus Communication:
Supports advanced communication integration for OEM and industrial equipment applications.
| Specification | Details |
| Brand | Honda |
| Model | GX800iRHTXA2 |
| Engine Series | iGX Series |
| Engine Type | EFI OHV V-Twin |
| Displacement | 779cc |
| Net Power Output | 24.8 HP |
| Start Type | Electric Start |
| Fuel System | Electronic Fuel Injection (EFI) |
| Governor System | STR Self-Tuning Regulator |
| Control System | Drive-by-Wire |
| Shaft diameter | 1-1/8" |
| Shaft Length | 3-3/4" |
| Shaft Keyway | 1/4" |
| Shaft Orientation | Horizontal |
| Compression Ratio | 9.1:1 |
| Oil Alert / Shutdown | Yes |
| Oil Filter | Spin-On |
| Fuel Tank Included | No |
| Muffler Included | No |
| Charging System | 17 Amp |
| Cooling System | High-Capacity Air Cooling |
| Low Oil Shutdown | Yes |
| Weight | 149 lbs |
| Warranty | 3-Year Limited Warranty |
What’s Included
- Honda iGX800 EFI Engine
- Key switch
- Control box
- Regulator
- Sub-wire harness
- Exhaust gaskets
- Owner’s manual
Important Notes
- Fuel tank not included
- Muffler not included
- Battery required for electric start operation
The Honda iGX800 engine is backed by Honda’s 3-Year Limited Warranty for commercial and consumer applications.
As an authorized Honda dealer, Spraywell can assist customers with warranty support, product questions, and warranty service coordination.
For complete warranty terms, exclusions, and coverage details, please refer to Honda’s official warranty documentation or contact Spraywell directly at 561-964-3228.
