KP520E 18hp Electric Start Engine Replaces GX390 LF420

Product Description

Introducing the KP520E: The New Benchmark in Single-Cylinder Power

We’re proud to unveil the KP520E, the latest evolution in the King Power engine lineup—and the most powerful single-cylinder petrol engine on the market today.

True 18hp Output
No inflated figures here. The KP520E delivers a verified 18 horsepower—13% more power than our KP460 and a mind boggling 38% more power than a standard GX390 —with practically zero increase in weight or external dimensions.

Direct Swap Compatibility
Running a Honda GX390 or a Chinese 13hp/15hp/16hp clone with a 1″ output shaft? The KP520E drops straight in—no modifications required.

Built for Racers
Whether you’re chasing lap times or maximum torque, the KP520E delivers. It’s already generating buzz among circuit owners and performance builders.

Special Note

This engine is purpose-built for sporting applications and therefore carries no warranty. For standard uses such as power washers or garden shredders, we recommend our 15hp or 16hp models, which are better suited to those requirements.

Available in the following shaft options:

• 1″ (25.4mm) Straight Shaft

Please measure the crankshaft of the engine you are wishing to replace to avoid any fitment issues.

Also suitable to replace

Honda: GX340, GX390

Loncin: G390, G420

Lifan: LF390, LF420

Hyundai: IC460XE

Chinese: 188F, 190F

Lifan is one of the world’s biggest engine manufacturers. Whether it’s powering brand-new equipment or renewing older machinery, you will find that Lifan engines are the perfect balance of build quality and value.

Unlike Honda and Loncin, who supply their products through a dealer network which adds extra costs and commission onto each purchase. Lifan & Westbank have entered into an exclusive partnership in the UK, so we’re always able to offer you the trade price.