HP MJF for Unmanned Systems
Integrated Lithium-Ion Battery Packs + V-Twin EFI Engines for Drones, UAVs & Robots
Vanguard 400 14 HP OHV engine engineered for seamless drop-in replacement & reduced TCO
Vanguard 400

14 HP OHV engine engineered for seamless drop-in replacement & reduced TCO

Visit Website Contact
Saved
Save
Vanguard 400

The Vanguard 400 horizontal shaft engine delivers powerful, high-displacement performance with the added benefits of advanced starting, extended maintenance intervals, and exceptional cold-weather reliability. Developed with direct customer input, this single-cylinder commercial engine is a high-torque, low-maintenance solution for demanding power applications. It’s a drop-fit replacement for legacy platforms—no modifications required—and includes a 3+1 year commercial-use warranty for peace of mind.

  • Lower noise. Less vibration. Increased user comfort: Engine structure minimizes vibration and sound for smoother handling and less operator fatigue.
  • Low TCO, reduced downtime: TransportGuard™, 600-hour air filter life, and extended oil service intervals significantly cut ownership costs.
  • Ideal for simple replacement: Fast drop-fit installation for the most popular engine footprints—ready for immediate repower applications.
Features & Benefits
  • Simplified 3-Step Starting
    Optimized for operator ease, the 3-step start system ensures faster, lighter recoil starts in any environment—proven at temperatures as low as -29°C.
  • Eliminate Fuel/Oil Dilution
    The TransportGuard™ 3-in-1 control shuts off fuel and ignition at once, preventing oil contamination and downtime from transport-related failures.
  • Optimized Fuel Management
    Improved fuel system maintains engine readiness, even with stale fuel, reducing risks associated with intermittent use or seasonal deployment.
  • Advanced Engine Protection
    Integrated low oil sensor helps prevent engine damage by detecting critical levels, adding a layer of automated safeguard.
  • Outperforms in All Terrains
    Optional 45° inclination package keeps the engine running smoothly on steep or irregular surfaces—ideal for rugged or mobile machinery.
  • More Efficient Power Management
    Governed idle improves throttle stability at low speeds, offering precise control and fuel efficiency across varying load demands.
  • Fewer Air Filter Changes
    Cyclonic air filtration system enables up to 600 hours between filter changes—doubling standard intervals for longer continuous use.
  • Longer Oil Maintenance Intervals
    Doubled oil change cycles reduce labor and waste, lowering costs and improving sustainability with up to 50% less oil disposal required.
  • Zero Overhang Muffler (Optional)
    Optional muffler design provides a clear mounting footprint, streamlining installation and repowering in tight engine compartments.
  • Reduced Noise and Vibration
    Engine balancing and refined architecture decrease noise and vibration levels, enhancing user comfort and equipment stability.
Specifications
Engine Type: Single-cylinder, 4-stroke, air-cooled, OHV
Model Number: 25V3
Gross Power @ 3600 rpm: 10.4 kW / 14.0 HP
Displacement: 408 cc
Cylinder: Cast iron sleeve
Bore & Stroke: 80.0 mm x 67.0 mm
Fuel Tank Capacity: 6.1 liters
Oil Capacity: 0.89 liters
Compression Ratio: 8.3 : 1
Air Cleaner: Integrated Cyclonic Air Cleaner
Ignition System: CDI Ignition
Lubrication System: Splash Lubrication
Dimensions (L x W x H): 359 x 444 x 459 mm
Dry Weight: 35.5 kg
Optional Features: Electric Start (12V), Alternators (3.0 & 20.0 amp), 45° Inclination Package, Clear Flange Muffler, Metric Flange, Threaded Crankshaft, Tapered Crankshaft, Tankless/Mufflerless Configuration

THE WEEKLY eBRIEF

The latest unmanned systems news, straight to your inbox.

Get our weekly roundup of technology developments, new products and industry news.

By subscribing, you agree to receive the weekly UST eBrief newsletter from EchoBlue Ltd. Unsubscribe at any time using the link in every email. See our Privacy Notice.

Advancing Unmanned Systems Through Strategic Collaboration UST works with major OEMs to foster collaboration and increase engagement with SMEs, to accelerate innovation and drive unmanned systems capabilities forward.