Honda GX31 Engine Specs

The Honda GX31 engine is a small, lightweight, and powerful four-stroke engine designed for a variety of applications. Whether you need a reliable engine for your lawn mower, brush cutter, or other small power equipment, the GX31 is a great choice. In this article, we will explore the engine configuration, engine oil specifications, and service intervals for the Honda GX31 engine.

Engine Configuration

The Honda GX31 engine features a single-cylinder, air-cooled design. It has a displacement of 31cc, which provides ample power for its compact size. The engine is equipped with a recoil starter, making it easy to start with just a pull of the starter rope. With a maximum output of 1.0 horsepower at 7,000 RPM, the GX31 engine delivers reliable and efficient performance.

Engine Oil Specs

Proper engine oil is essential for the smooth operation and longevity of any engine, including the Honda GX31. The recommended engine oil for the GX31 is a high-quality 4-stroke engine oil with a viscosity grade of SAE 10W-30. It is important to use oil specifically designed for small engines to ensure optimal lubrication and protection against wear.

Service Intervals

Regular maintenance is crucial to keep your Honda GX31 engine running smoothly. Here are some recommended service intervals to follow:

1. Oil Change: The engine oil should be changed every 25 hours of operation or at least once a year, whichever comes first. Be sure to drain the old oil while the engine is warm and refill it with the recommended oil.

2. Air Filter Cleaning: The air filter should be checked and cleaned every 25 hours of operation or more frequently if operating in dusty conditions. Remove the air filter cover, clean the filter element with compressed air or a mild detergent, and reinstall it properly.

3. Spark Plug Replacement: The spark plug should be inspected and replaced every 100 hours of operation or once a year, whichever comes first. Use a spark plug wrench to remove the old plug, and install a new one with the correct gap according to the engine’s specifications.

4. Fuel Filter Replacement: The fuel filter should be replaced every 200 hours of operation or once a year, whichever comes first. This will help ensure a clean fuel supply to the engine and prevent clogging.

5. Valve Clearance Adjustment: The valve clearance should be checked and adjusted every 300 hours of operation or once a year, whichever comes first. This is a critical maintenance task that should be done by a qualified technician to ensure proper engine performance.

By following these service intervals and performing regular maintenance, you can keep your Honda GX31 engine in top condition and enjoy reliable performance for years to come.

Detailed Engine Specifications

To provide a comprehensive overview of the Honda GX31 engine, here are the detailed specifications:

Engine Type Air-cooled, 4-stroke, single-cylinder
Displacement 31cc
Maximum Output 1.0 HP @ 7,000 RPM
Starting System Recoil
Fuel Tank Capacity 0.65 liters
Oil Capacity 0.1 liters
Recommended Oil SAE 10W-30
Spark Plug NGK CMR6H
Valve Clearance Intake: 0.10 – 0.15 mm
Exhaust: 0.10 – 0.15 mm
  • Weight: 3.2 kg
  • Dimensions (L x W x H): 192 x 234 x 230 mm
  • Ignition System: Transistorized magneto
  • Carburetor: Diaphragm type
  • Fuel: Unleaded gasoline (86 octane or higher)
  • Recommended Fuel Consumption: 0.42 liters/hour at 7,000 RPM

In conclusion, the Honda GX31 engine offers a compact yet powerful solution for various small power equipment needs. With its reliable performance, easy maintenance, and detailed specifications, the GX31 is a trusted choice for professionals and homeowners alike. Remember to follow the recommended service intervals and use the appropriate engine oil to ensure optimal performance and longevity of your Honda GX31 engine.

Categories: 0-1.0Honda

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