Vertical V-Twin Engine Manufacturer
Fullas is a professional manufacturer of vertical V-twin engines for generators and industrial power equipment. Our engines feature a compact vertical layout, stable dual-cylinder output, and reliable performance under continuous operation, delivering fuel efficiency, durability, and long service life for construction sites, workshops, outdoor power systems, and backup power applications.
Vertical V-twin Engine
Fullas vertical V-twin engines deliver stable and efficient power for a wide range of industrial applications. Featuring a compact vertical layout and balanced dual-cylinder design, they provide smooth operation, strong torque output, and reliable performance for generators, outdoor equipment, workshops, and backup power systems. Built with durable components and factory-tested for quality, Fullas vertical V-twin engines offer dependable power you can trust.
635CC Gasoline Engine (FP2P76F)
Looking for a compact V-twin engine with balanced power output? The 635cc vertical V-twin gasoline engine delivers stable performance and efficient operation, making it suitable for small to mid-range generators, pumps, and light industrial equipment where reliability and fuel efficiency are required.
708CC Gasoline Engine (FP2P77F)
Need higher torque and stronger continuous power? The 708cc vertical V-twin gasoline engine provides increased output and improved torque performance, ideal for medium-duty generator sets and industrial machinery requiring consistent and dependable operation.
803CC Gasoline Engine (FP2P82F)
Searching for maximum power in a compact V-twin design?The 803cc vertical V-twin gasoline engine is designed for high-demand applications, offering strong torque, stable power delivery, and durability for heavy-duty generators, construction equipment, and commercial power systems.
Build your gasoline engine wholesale business with a reliable Chinese manufacturer.
Twin-Cylinder Engine Technology
Reduced Noise & Vibration
Advanced CAE analysis technology is applied to optimize key component structures, effectively reducing engine vibration and operating noise. The optimized design ensures smoother operation and improved comfort during long-hour use.
Superior Reliability
The engine is equipped with an imported fuel pump to ensure stable and reliable fuel delivery. A full-pressure lubrication system is adopted to reduce internal wear and extend engine service life.
In addition, a dual-layer cyclone-type air filter with a special filter element is used to effectively prevent dust and impurities from entering the engine under harsh working conditions.
Powerful Output
The 90-degree V-twin OHV configuration combines compact dimensions with large displacement, delivering strong and consistent power output.
Optimized valve timing improves air intake efficiency and combustion performance, increasing power output by 5–10% compared with engines of the same displacement.
Low Oil Consumption
An optimized air-cooling duct structure combined with an oil cooler helps reduce operating oil temperature. The labyrinth-type oil-air separation design further minimizes oil loss, resulting in lower oil consumption and improved long-term operating efficiency.
WHAT SETS US APART?
EFI Engine Comparison Chart
| Engine Type | V-twin cylinder, Air cooled, 4-stroke, OHV | V-twin cylinder, Air cooled, 4-stroke, OHV | V-twin cylinder, Air cooled, 4-stroke, OHV | V-twin cylinder, Air cooled, 4-stroke, OHV | V-twin cylinder, Air cooled, 4-stroke, OHV |
| Displacement (cc) | 586 | 635 | 708 | 764 | 803 |
| Net Power (kW / 3600 r/min, SAE J1349) | 12.5 | 13.5 | 16 | 17 | 18 |
| Bore × Stroke (mm) | 73 × 70 | 76 × 70 | 77 × 76 | 80 × 76 | 82 × 76 |
| Net Torque (Nm / r/min) | 37 / 2400 | 40 / 2400 | 47.5 / 2400 | 52 / 2400 | 55 / 2400 |
| Starting System | Electric | Electric | Electric | Electric | Electric |
| Lubrication System | Splash + Pressure | Splash + Pressure | Splash + Pressure | Splash + Pressure | Splash + Pressure |
| Air Filter | Dual-filter element | Dual-filter element | Dual-filter element | Dual-filter element | Dual-filter element |
| Engine Oil Capacity (L) | 1.7 | 1.7 | 2.4 | 2.4 | 2.4 |
| Net Weight (kg) | 36 | 36 | 42 | 42 | 42 |
| Product Dimension (L × W × H) (mm) | 430 × 425 × 412 | 430 × 425 × 412 | 466 × 480 × 356 | 466 × 480 × 356 | 466 × 480 × 356 |
| Loading Qty (20GP / 40HQ) | 480 / 810 | 480 / 810 | 440 / 700 | 440 / 700 | 440 / 700 |
Key Technologies Inside Fullas Vertical V-Twin Engine
Fullas vertical V-twin engines combine a compact vertical layout with balanced dual-cylinder architecture and precision mechanical engineering. Each core structure is carefully designed to improve power stability, durability, and long-term operating reliability. The following key technologies define the performance advantages of our vertical V-twin engines in demanding applications.
Vertical V-Twin Cylinder Architecture
The vertical V-twin configuration provides natural mechanical balance and smoother power delivery. Compared with single-cylinder designs, vibration is significantly reduced, resulting in more stable operation and improved component longevity.
Balanced Torque Output
Dual cylinders deliver continuous and evenly distributed torque across the operating range. This ensures stable performance under variable loads, making the engine suitable for generators, industrial equipment, and long-hour operation scenarios.
Efficient Air-Cooling System
Optimized airflow channels and cooling fin design improve heat dissipation efficiency. The vertical layout enhances natural air circulation, maintaining stable operating temperatures even under high load or elevated ambient conditions.
High Mechanical Reliability
Key components are designed with reinforced structures and precision machining. The V-twin layout reduces peak stress on individual components, improving durability and ensuring reliable performance over extended service life.
Compact Structure with High Power Density
The vertical V-twin design combines compact overall dimensions with relatively large displacement. This high power-to-size ratio allows easier integration into generator sets and industrial equipment without sacrificing output performance.
Stable Operation Under Continuous Load
Optimized crankshaft balance and valve train design ensure smooth operation during continuous running. The engine maintains consistent speed and output stability, supporting reliable power supply in demanding working environments.