New Vanguard® 400 EFI/ETC

New Vanguard® 400 EFI/ETC

Model Number : 25E3

This 408cc engine is unlike any other single-cylinder on the market, loaded with innovations and features to dominate any job.


Horsepower (HP)


Displacement (cc)


No. of Cylinders


Fuel Type


Easy Starting

Chokeless starting makes for a simplified user experience when firing up the engine.

Automotive Style Starting

ECM controlled starting for easier diagnostics and alerts.

Vanguard EFI

Open-loop EFI system delivers greater efficiency and higher productivity due to no droop.

Electronic Throttle Control

Reacts instantly to any applied load from its environment to maintain smooth, consistent power in any condition.

Cyclonic Air Cleaner

Standard feature on all Vanguard single-cylinder engines, 600 hour replacement interval.

Nano Media Air Cleaner Filter Element with Autoshed Technology

Proprietary self-cleaning filter media specially engineered to work with the Vanguard 400 engine.

Liquid Cylinder Gasket

Provides more durable seal and reliable lubrication.

Stale Fuel Resistance

Specially designed fuel system improves resistance to effects of stale fuel.

Acoustically Designed Engine

Air Cleaner, Fuel Tank and Muffler optimized to reduce noise and deliver improved tonal quality.

Electronically Controlled Idle

Allows for more usable power at idle, precise speed setting and better load response.

High Inclination Package

Optional feature allows continuous 45° operation in any direction.

Engine Cooling

Specially designed blower, rewind and shielding to help engine run cooler for longer.

Oil Sensor

Protects the engine from low oil level conditions.

Service Solution

Suite of support and diagnostic tools allows for minimizing potential downtime

Engine Warranty **

Three year limited commercial engine warranty for all applications. REGISTER YOUR VANGUARD 400 EFI/ETC ENGINE and receive an additional year of warranty.


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HP (gross) *
Engine Displacement (cc)
Engine Configuration
Bore (in)
Stroke (in)
Weight (lbs)
Oil Capacity (oz)
Lubrication System
Splash Lubrication
Air Filter
Integrated Cyclonic Air Cleaner
Ignition System
Computer Controlled Ignition
Fuel Tank Capacity (L)
Compression Ratio
Width (in)
Length (in)
Height (in)
3 Year Limited; +1 Year Bonus Warranty with Registration

*All power levels are stated gross HP at 3,600 RPM per SAE J1940.
**See operator's manual or dealer for complete warranty details.



Download the operator's manual or illustrated parts list for your Vanguard™ engine by searching your engine model number.

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Tips & Troubleshooting

Have a question? Search our Frequently Asked Questions to find answers related to model specifications, routine maintenance, repair or troubleshooting. 

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Dealer Locator

World class parts delivery, industry-leading global warranties and unparalleled service & training keeps your equipment out of the shop and on the jobsite. 

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Commercial Limited Warranty

Three-year commercial engine warranty for all applications. See operator's manual or dealer for complete warranty details. 

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12V Electric Start
Alternator – 20.0 amp
Threaded Crankshaft
Tapered Crankshaft
Metric Flange
Low Profile or Remote Air Cleaner
Clear Flange Muffler
Wire or Stamped Muffler Guards
Tankless / Mufferless
High Inclination Package (45° operation)
Remote Speed Option
Remote Mount Control Panel

Product Literature

For more detailed information on the Vanguard® 400 EFI/ETC, please download literature here.

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