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03 9376 4333

Meet the world's lightest OHC engine. Honda applied decades of superior engine technology to create the world's first 360° inclinable 4-Stroke engine. Perfect for powering Commercial Lawn & Garden Equipment, the ultra-lightweight GX25 mini 4-Stroke engine delivers the kind of efficient, clean, powerful & quiet performance that you'd expect from a larger engine - but in a very compact package. The GX25 is also well-known for powering Tillers/Cultivators, Water Pumps, Agricultural Equipment and Construction/Industrial Equipment. When you see the GX25 powering Honda-branded equipment like brushcutters and blowers, you know you're getting a premium engine. The world's lightest OHC engine, the Honda Mini 4-Stroke engine requires no fuel/oil mixing, and runs at approximatley half the operating cost of comparable 2-Stroke engines. A full 360° "any-side-up" operation means you can use and store the GX25 in any position, and take advatage of the exclusive rotary-slinger lubrication system. An exhaust decomprssion system and unique low inertia design means the GX25 engine will start first time, every time with ease. The GX25, like so many other Honda Engines, is covered by a comprehensive Domestic & Commercial 3 Year Warranty.

  • Model: GX25
  • Type: 4-Stroke, overhead cam, single-cylinder, horizontal shaft
  • Bore & Stroke: 35 x 26 mm ( 1.4 x 1.0 in )
  • Displacement: 25cm3 ( 1.5 cu in )
  • Compression Ratio: 8.0:1
  • Net Power: 0.72kw ( 1.0HP ) at 7,000 rpm
  • Maximum Net Torque: 1.0Nm ( 0.74 lbs ft ) at 5,000 rpm
  • Ignition System: Transistorised Magneto Ignition
  • Starting System: Recoil Starter
  • Cooling System: Forced-air
  • PTO Shaft Rotation: Counter-clockwise (from P.T.O. side)
  • Fuel Consumption At Rated Power: 0.54 L/h at 7,000 rpm
  • Recommended Fuel: Unleaded
  • Lubrication System: Oil Mist
  • Recommended Oil: 10W/30 API SG
  • Oil Capacity: 0.08l
  • Fuel Tank Capacity: 0.55l
  • Dimensions: 192mm x 221mm x 230mm
  • Dry Weight: 2.78kg (w/o clutch)
  • Other Specs: Infinite Operating Angles 


Symonds Industrial Engines (VIC) Pty Ltd endeavours to dispatch your order as soon as possible, however this may take up to 2 business days.  

You will be able to trace your order with a tracking number that will be e-mailed to you once the order has been dispatched.

Our freight suppliers will deliver to a business or residential address, to a ground floor only.

Deliveries will be Monday to Friday 8:30am to 5:00pm.  Deliveries are not available after business hours, weekends or public holidays.

Please be home on the day your order is due to be delivered. If you are not at the delivery address on the day due for delivery, you will be notified that a delivery has been attempted, and you will have the choice to pick up from the freight depot, or a re-delivery can be arranged for an extra cost. Symonds Industrial Engines (VIC) Pty Ltd is not liable for any cost relating to re-delivery as a result of the recipient not being at the delivery address on the delivery due date.

Our freight suppliers do not deliver to PO Box addresses.

Estimated delivery times once Despatched:

  • 1-2 Days          VIC
  • 2-3 Days          NSW, ACT & SA
  • 3-5 Days          QLD & TAS
  • 5-7 Days          WA
  • 7-10 Days        NT

Please allow more time for orders sent to remote areas, or large items being sent out.

If your order has not been received in the specified time, please contact us on either [email protected] or 03 9376 4333.

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Honda GX25 1HP Mini 4-Stroke Engine

  • Product Code: GX25
  • Availability: In Stock
  • RRP  $385.00
  • $335.00

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Tags: GX25, Honda Engine