Thank you for purchasing a Honda engine.

This manual covers the operation and maintenance of your engine.

All information in this publication is based on the latest product information available at the time of printing.

Honda Motor Co., Ltd. reserves the right to make changes at any time without notice and without incurring any obligation.

No part of this publication may be reproduced without written permission.

This manual should be considered a permanent part of the engine and should remain with it if it is resold.

Pay special attention to statements preceded by the following words:

Indicates a strong possibility of severe personal injury or death if instructions are not followed.

Indicates a possibility of personal injury or equipment damage if instructions are not followed.

Indicates that equipment or property damage can result if instructions are not followed.

Gives helpful information.

If a problem should arise, or if you have any questions about your engine, consult an authorized Honda dealer.

The Honda engine is designed to give safe and dependable service if operated according to instructions. Read and understand the Owner’s Manual before operating the engine. Failure to do so could result in personal injury or equipment damage.

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Honda Power Equipment GX25 owner manual
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GX25 specifications

Honda Power Equipment GX25 is a compact and highly versatile engine that is part of Honda's renowned GX series, ideal for a variety of outdoor power equipment. This lightweight, yet powerful engine is designed with efficiency and durability in mind, making it a popular choice for both commercial and residential applications.

One of the standout features of the GX25 engine is its 4-stroke design. Unlike many traditional 2-stroke engines, which require oil to be mixed with fuel, the GX25 operates on pure gasoline. This not only results in lower emissions, making it an environmentally friendly option, but also simplifies maintenance as there's no need for oil mixing. The engine's overhead cam design contributes to its efficiency, allowing for smoother operation and better fuel economy.

The GX25 engine boasts a displacement of 25 cc, which enhances its power output while maintaining its compact size. With a maximum output of around 1.0 horsepower at 7,000 RPM, this engine provides ample power for various applications, such as string trimmers, blowers, and more. Its lightweight design, at approximately 3.8 kg (8.4 lbs), makes it easy to handle, reducing operator fatigue during extended use.

In terms of reliability, the GX25 is equipped with Honda’s proven engineering, offering a long service life even under heavy usage. The engine features an integrated ignition system for quick starting and a spark arrestor that enhances safety during operation, especially in brushy areas where fire hazards may be a concern. Additionally, it is designed with a low vibration system, which further enhances comfort for the user.

The GX25 also includes advanced technologies such as a vortex combustion chamber, which optimizes fuel efficiency and improves power output while reducing emissions. Its ability to start easily in various conditions, along with its excellent fuel efficiency, makes it a preferred choice for professional landscapers and homeowners alike.

In summary, the Honda Power Equipment GX25 engine encapsulates a perfect blend of power, efficiency, and reliability. Its lightweight, compact design, coupled with innovative technologies, sets a standard in the industry, making it an exceptional choice for those seeking a high-performance engine for their outdoor power equipment needs. Whether for commercial use or home gardening, the GX25 delivers performance that stands the test of time.
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