Top 10 Best 400cc engine in 2026

Last Updated - 6/10/2026

🏆Best Choice

BILT HARD

BILT HARD 420cc 15HP Gas Engine with Electric Start, Horizontal Shaft 4 Stroke OHV Gas Motor, Gas Powered Multi-Use Engine

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•POWERFUL ENGINE - Our 420cc displacement 4-stroke horizontal cylinder gas engine has a max torque of 18.45ft.lbs @2500RPM, max 3800 RPM speed, 15 maximum horsepower, 1.2 gal fuel tank. Built to meet & exceed industrial grade quality standards & provide dependable performance. The engine is shipped dry so make sure you add gasoline and engine oil correctly before starting (not included).
•SHAFT SPECS - 1 in Diameter, 3.48 in Length, end tapped with 3/8 in.-24 UNF; Keyway 1/4 in; Mounting pattern 7.72" L x 3.39" W-4.06" W. Durable design runs quiy and provides smooth operation.This engine spark plug system can take Torch: F6TC spark plugs, with a clearance of: 0.027-0.0.31 in. The engine runs on a minimum 87+ unleaded gasoline (ETHANOL＜10% recommended).
•SAFETY & WIDELY APPLICATIONS - Built-in Force Air-Cooled and Splash Lubrication System, keeping the motor cool during extended use of time and ensure the operator's safety. A low oil shutoff functionality turns the engine off to prevent serious damage or failure. It's the perfect replacement engine for cement mixers, compressors, mowers, log splitters, vacuums, tillers, water pumps, chipper/shredders and blowers.
•GREAT REPLACEMENT - Our 420cc 15HP Horizontal Engine is a great replacement for your Honda GX340, 389cc, GX390, 389cc, Briggs & Stratton GX340, 389cc, GX390, 389cc, Kohler CH440, 429cc, ECH440, 429cc, ECH440LE, 429cc, Yamaha MZ360, 357cc, MX360, 358cc, MX400, 402cc etc.
•KINDLY NOTED- with EPA compliant, each gas engine will be Oil Tested before packaging, so it may touch a little oily, but 100% new condition.

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$399.99

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DuroMax

DuroMax XP18HP 440cc Recoil Start Gas Powered 50 State Approved, Multi-Use Engine, XP18HP, Blue

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•440cc 4 Stroke OHV Engine
•Large 1.7 Gallon Fuel Tank
•Runs on Standard 87 Octane Gasoline
•Start System: E-Z Pull Recoil Starter
•Shaft Size: 1" Diameter, 2-3/4" Long, 1/4" Keyway

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$399.00

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Aceup Energy

Aceup Energy 15HP 420cc Gas Engine Horizontal Shaft, 4 Stroke OHV Gas Motor with Electric Start, Shaft 1" (25.4mm) Diameter

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Shaft 1" diameter , 3.48" long, end tapped with 3/8"- 24 UNF, Keyway 1/4"
•Gas engine motor built-in 4 stroke, air cooled with recoil/electric start
•15HP 3600RPM, OHV gasoline engine, 1.7 gallon fuel tank; It can be applied to log splitter, pressure washer, rotor tiller, cement mixers, lawn equipment, snowblower
•Equipped with steel camshaft, forged crankshafts and cast iron cylinder liners to ensure superior performance and longer service life
•All our gas powered engines tested in the factory to guarantee quality; EPA compliant; Backed by a 2 year limited warranty with free lifetime technical guidance from experts

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$329.99

$378.99

-13%

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Arligaaduo

Horizontal Shaft Gas Engine, 15HP 420CC 4 Stroke Gas Engine OHV Industrial Grade Replacement Gas Motor with Recoil/Pull Start & Single Cylinder System for Go Karts Lawn Mower

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•★STRONG POWER: The 4 stroke engine has a high power of 9700W and a speed of 3000-3600 rpm, which provides you with strong power and ensures that your work can be completed quickly and easily.
•★LONG ENDURANCE: The 4-stroke OHV engine has a large fuel tank capacity of 1.43gal allowing it to work for a long time without frequently refilling, which is very convenient.
•★EFFICIENT COOLING: The 4-takt-OHV-motor with built-in air cooling mode and dense heat dissipation holes are designed to keep the motor cool and provide high reliability and durability.
•★PREMIUM MATERIAL:The horizontal shaft gas engine is mainly made of high-class aluminum and iron, and the surface is treated with a painting technology, which is impact-resistant, and scratch-resistant, with high durability and reliability, ensuring long-term use.hanks to the smooth surface of the gas motor and simple structure, you can easily wipe off the dirt on it with a soft cloth (not included).
•★HIGH SAFETY: The gasline powered engine is equipped with an oil alarm. If enough oil is not added before starting, the machine will automatically turn off to protect the machine. Moreover, the iron cylinder liner makes engine operation smoother and overall performance more stable, thus the machine will not be easily damaged and has a longer service life.
•★SIMPLE OPERATION: The sturdy nylon pulling wire and economical starter handle make it easy for you to start the horizontal shaft gas engine, and the red engine switch can help you easily shut down the engine when not in use.
•★LOW FUEL CONSUMPTION: The 4-stroke engine with OHV overhead valve effectively helps reduce carbon buildup and dramatically improves fuel savings. In addition, it is equipped with a high-precision carburetor to reduce fuel consumption (≤374g/kw.h), thus reducing costs.

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$128.99

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Briggs & Stratton

Briggs & Stratton 356447-0080-G1 Vanguard 570cc 18 HP Gas Engine

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•570cc
•Advanced Debris Management
•Dura-Bore Cast Iron Cylinder Sleeve
•Full Pressure Lubrication w/ Spin-On Oil Filter
•Oil Cooler

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$1568.95

$2008.49

-22%

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Mahugde

15HP 4-Stroke Gas Engine 420CC OHV Horizontal Shaft Single Cylinder Gas Engine, Recoil Start Go Kart Motor/Manually Starting Motor with Pull Handle and Silencer for Compressor Lawnmower

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Energy-saving&Money-saving: With a large capacity fuel tank (1.72 gallons), it works for a long time, so you don't have to refill frequently. In addition, the engine is equipped with a high-precision carburetor to reduce fuel consumption (≤374g/kw.h), thus reducing costs.
•Efficient Cooling: The built-in forced air cooling mechanism is designed to keep the motor cool, providing high reliability and durability. In addition, the heat dissipation holes also help reduce the temperature of the motor in time, prolong the service life of the motor, and reduce potential safety hazards.
•Low Noise: The silencer will effectively reduce noise and provide you with a relatively quiet working environment.
•Thoughtful Design: The product is equipped with a low oil alarm function, preventing the engine from suddenly flaming out, to provide you with convenience.
•Effortless Cleaning: Thanks to the smooth surface and simple structure, you can easily wipe off the dirt on it with a soft cloth (not included).

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$134.99

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ZTUOAUMA

Chery Genuine Gasoline Engine SQR372 812CC for John Deere 825i 835i Kawasaki Mule Pro FX FXT FXR Joyner Trooper Textron Prowler Pro Oreion Reeper Discovery UTV800 Tinger Track C500 S500 S380 TR5 V800

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Part Number: SQR372; Displacement: 812CC; Cylinders: 3; Stroke: 4
•Application Models: Compatible with Chery QQ Joyner Trooper Mini Sand Viper Sandcars Gs-Moon Jeep Buggy Arctic Cat Prowler Pro Crew EPS/XT/LTD Ranch Crew Textron Oreion Reeper and Tracker 800 SX Crew Discovery UTV800
•Compatible with John Deere 825I 835E 835M 835R Gator for Kawasaki Mule Pro FX FXT FXR Rancher Utility Vehicles UTV ATV ROV
•Also Compatible with Tinger Terrain Tinger Track C500 S500 S380 TR5 V800 Armor W8 W6 (Check and see detailed models in description below)
•Package Includes: 1X Gasoline Motor Assembly; 1X Set of Manifold Gaskets
•This is direct replacement from Chery to fit many more UTV ATV brands, it is often used on UTV ATV to power on, make sure the correct and original channel to purchase

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$1799.00

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Briggs & Stratton

BRIGGS&STRATTON 386447-0090-G1 23 HP Vanguard Engine, Black

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•627cc
•Advanced Debris Management
•Dura-Bore Cast Iron Cylinder Sleeve
•Full Pressure Lubrication w/ Spin-On Oil Filter
•Oil Cooler
•Centrally Located Oil Pump and Pickup
•High Efficiency Head Design
•Light Weight Piston & Ring Package
•Dynamically Balanced Crankshaft
•Low Profile Dual-Clean Air Cleaner

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$1749.00

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Saihisday

Saihisday 38mm Carburetor Compatible with Yamaha YZ250 1978-2002 Beyond 150cc Engine 250cc 300cc 350cc 400cc Off Road Motorcycle Scooter UTV ATV Dirt Bike Quad

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•For PWK 38mm Carburetor! Confirm the size before purchase
•Compatible with 1978-2002 Yamaha YZ250
•Fits for 250cc 300cc 350cc 400cc Off Road Motorcycle Scooter UTV Dirt Bike Quad
•Fits for ATV TRX250R CR250 YZ250 YFM450 YZ KX RM CR LT 125 250 500
•Installation Reminder: Please install the product according to professional requirements after receiving the item

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$35.79

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CUBELLIN

CUBELLIN 200CC 250CC ATV Motor Engine 4 Stroke Motor Engine Manual Gear Shift 5-Speed ATV Engine 7500RPM Single Cylinder Air Cooling Engine for ATV Motorcycles with CDI System

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•200CC/250CC MOTOR ENGINE: This ATV motor engine boasts a robust 14HP, a displacement of 200cc/250cc, and a max rotating speed of 7500RPM, which provides you with strong power and ensures that your drive will be very smooth and powerful.
•DURABLE 250CC ENGINE: The ATV motor engine is equipped with premium aluminum and cast steel, ensuring superior performance and a longer lifespan and adapting to complex environments and conditions.
•5 ADJUSTABLE SPEED: The motor engine's 5-speed Cycle Gear,No reverse gear transmission provides you with high-precision gear shifting control, so it allows you to easily adapt to various changes. The motorcycle engine makes your driving experience more exciting under different road conditions.
•CDI IGNITION SYSTEM: The CDI ignition system (not included) leads to higher energy and ignition efficiency. So you can start the motor engine quickly and safely.
•AIR COOLING SYSTEM: The 4 stroke ATV motor engine adopting an air cooling system, the temperature of the engine can be quickly reduced, effectively preventing overheating and ensuring smooth and long-lasting driving.
•EASY TO INSTALL: Our 200cc/250cc ATV motor engine is pre-installed and you only need to spend a little time and effort to complete the remaining parts, enjoying a sense of achievement! The closed design effectively prevents dust, water, oil, etc. from entering the machine, while minimizing the need for daily maintenance as much as possible.

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$215.94

$240.99

-10%

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