The Air-cool 351CC Engine from fourobot conveys 25HP at 7500rpm with demonstrated air-cooling innovation. This twin-cylinder powerhouse weighs fair 9.85kg whereas creating 112kg of drag constrain at 100m height. Sponsored by 10 a long time of fabricating skill and ISO/CE certifications, our motor dispenses with coolant spill dangers through optimized aluminum combination cooling balances. With 100 units in stock and a 20-day generation cycle, you'll get enterprise-grade execution without compromise. Our comprehensive 1-year guarantee and worldwide specialist organize guarantee your operations never skip a beat.

You require control you can depend on. Our Air-cool 351CC Engine solves real-world challenges you confront daily.
Lightweight Plan, Heavy-Duty Performance
At beneath 10kg, you get extraordinary power-to-weight proportion. Transport hardware effectively. Send quicker on work locales. The compact 357×295×278mm measurements fit where bulkier motors can't.
Built for Unforgiving Environments
No radiators cruel no coolant spills in farther areas. Work unquestionably in dusty, sloppy, or high-altitude conditions. The air-cooling framework flourishes where liquid-cooled motors fail.
Proven Fabricating Excellence
Our office works beneath strict quality conventions. Each crankshaft experiences energetic adjusting. Each barrel gets borescope assessment. You get motors tried to 5,000-cycle standards.
Fast Arrangement When You Require It
We keep up 100 ready-to-ship units. Little orders transport inside 20 days. Our 5×12-hour reaction time implies your questions get replied quickly.
| Configuration | Parameters |
|---|---|
| Cooling Mode | Air Cooling |
| Cylinder | 2 |
| Performance | 25HP/7500rpm |
| Idle Speed | 2000rpm/minute |
| Pull Force | 112kg (Altitude 100m) / 108kg (Altitude 1800m) |
| Displacement | 351cm³ |
| Cylinder Diameter × Stroke | 66mm × 54mm |
| Compression Ratio | 10.5:1 |
| Lubrication Ratio | 25:1 |
| Engine Weight | 9.85kg |
| Exhaust Pipe Weight | 140g × 2 |
| Igniter Weight | 190g |
| Igniter Voltage | 6V-14.4V |
| Dimensions (L×W×H) | 357×295×278mm (±10mm) |
| Applicable Propeller Specs | 30×16; 32×16; 40×18; 45×20 |
| Spark Plug Model | BM6A |
Agricultural Machinery
Power through sloppy ranches without stressing approximately clogged radiators. The tall low-end torque handles overwhelming loads easily. Your utility vehicles work dependably season after season.
Power Era Systems
Run generators for 12+ hours at farther development destinations. The basic warm direction anticipates overheating issues. No coolant implies less disappointment focuses in basic applications.
Drone & UAV Applications
The lightweight plan maximizes flight time. Congruous with different propeller determinations. Solid start frameworks guarantee steady execution at changing altitudes.
Marine Assistant Power
Compact impression spares important space on vessels. Electric begin capability gives prompt mobilization. Works dependably as reinforcement control when you require it most.
Off-Road Vehicles
Navigate rough mining or agrarian landscape unquestionably. The air-cooled framework disposes of punctured hose concerns. Basic upkeep keeps your armada operational.
We do not fair construct Air-cool 351CC Engine. We design reliability.
International Certifications
CE, ISO, TAF, and TELEC compliance guarantees worldwide showcase get to. Our fabricating meets thorough worldwide standards.

Rigorous Testing Protocols
Customization Support
Need specific configurations? We offer ODM/OEM services. Function customization adapts to your country's requirements. Your unique operational needs become our engineering focus.

Flexible Logistics
Choose air, sea, or land transportation. We adapt shipping methods to your timeline and budget.
Global Support Network
Local agents provide timely after-sales service. Language barriers disappear. Technical support arrives when you need it.
Competitive Value
Quality doesn't mean excessive cost. Our pricing balances performance with affordability. Fast delivery and efficient communication maximize your investment.

Q: What makes air-cooling better than liquid cooling for my application?
A: Air-cooling eliminates leak risks in remote or rugged environments. You avoid water pumps, hoses, and thermostats that create failure points. Maintenance becomes simpler and more cost-effective over the engine's lifetime.
Q: Can this engine operate in extreme temperatures?
A: Yes. The air-cooled design prevents freezing issues in cold climates and boiling problems in hot conditions. High-surface-area aluminum fins dissipate heat effectively across temperature ranges.
Q: What's included in the 1-year warranty?
A: Our warranty covers manufacturing defects and material failures. Global local agents provide service support. You receive responsive assistance throughout the warranty period.
Q: How quickly can I receive a custom order?
A: Standard inventory ships immediately from our 100-unit stock. Custom orders (1-10 units) complete within 20 days. Larger customizations receive dedicated project timelines.
Q: What maintenance does this engine require?
A: Regular maintenance includes spark plug inspection, air filter cleaning, and proper fuel-oil mixture at 25:1 ratio. The simple structure means fewer components to service compared to liquid-cooled alternatives.
Q: Is technical documentation available in my language?
A: We provide comprehensive technical manuals and support materials. Our global agent network offers localized assistance in multiple languages.
Contact our team at sales@fourobot.com to discuss your specific requirements for Air-cool 351CC Engine today.
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