A lawnmower might be the most frequently used power tool in your garage, but it’s not the only one.
We researched and tested dozens of engines from the top brands, evaluating performance, durability, and noise level. Our top pick, the Briggs & Stratton 17.5 Gross HP Engine, is reliable, quiet, and has a long lifespan.
Here are the best replacement outdoor power tool engines.
Best Replacement Outdoor Power Tool Engines: Editor Recommended
Our Editor’s Best Replacement Outdoor Power Tool Engines Reviews
Bestseller No. 1
Diesel Engine, 4-Stroke 10hp 418cc Diesel Motor, 6.3kw 3600rpm Vertical Horizontal Shaft Diesel Tiller Motor, w/Recoil Manual Start&Air-Cooled, for Micro-tillers, Drainage, Irrigator, 186FA, Black
- 【High-Quality Materials】: Our 4 stroke 10hp diesel engine is constructed from premium iron, aluminum, and die-casting aluminum, ensuring a robust structure and excellent heat dissipation. The spray molding technology enhances corrosion resistance, ultimately extending the engine's service life.
- 【Powerful and Efficient Performance】: This 418cc Diesel Motor delivers impressive power of up to 6.3kW at 3600rpm, providing strong performance that boosts productivity while saving time and energy for various applications.
- 【User-Friendly Operation】: Featuring a manual recoil start system, this diesel engine motor allows for quick and convenient operation. Its ergonomic design includes a speed-adjustable knob and a throttle cable mounting bracket, making it adaptable for your specific needs.
- 【Effective Heat Dissipation】: Equipped with a forced air-cooling system and well-designed cooling holes, our 10hp diesel engine ensures rapid heat dissipation. This feature prolongs its service life and avoids stalling during extended use, ensuring reliable performance.
- 【Enhanced Stability and Maintenance Features】: This 418cc diesel engine includes to safeguard against impurities, a pressure-reducing valve to maintain optimal air pressure, an oil dipstick for easy oil level monitoring, and an oil drain screw for efficient maintenance procedures.
Bestseller No. 2
Predator 6.5 HP 212cc OHV Horizontal Shaft Gas Engine - NOT Certified for California; Fuel Shut Off and Recoil Start
- Durable cast iron cylinder withstands wear and abuse
- User-friendly controls for easy starting and operation
- Recoil start
- Fuel shut off for safe transport
- Ball bearing support shaft for long life
Bestseller No. 3
GrfceVue 7.5HP 4-Stroke Gas Engine, 212CC Mini Bike Engine Horizontal Shaft Gas Powered Engine Pull Start Go Kart Motor Air Cooling for Go Kart Log Splitter Lawnmowers (Black)
- Excellent Materials: The product is mainly made of iron, aluminum, and plastic with die-casting, stamping, and plastic spraying process, which has high hardness, corrosion resistance, and rust resistance, and has a long service life.
- Carefully Designed: The fuel tank has a large capacity of 0.8 gallons, enabling it to work for a long time, so you don't need to fill the fuel tank frequently to save time and energy. This engine is equipped with a silencer, which can effectively reduce noise and provide you with a comfortable working environment.
- Powerful & High Efficiency: With a high power of 7.5HP and 3600rpm, our engines produce a lot of power to help you get the job done quickly and efficiently.
- Saving Energy: Adopting a 4-stroke engine and carburetor design, it has a high fuel utilization rate and a fuel consumption of 0.08gal/Kw/h, which is energy-saving.
- Good Heat Dissipation: There are many heat dissipation holes on the surface of the engine, which can dissipate heat quickly and prevent the engine from burning after a long time of use.
Bestseller No. 4
LIWBYYG 15 HP 4 Stroke Gas Engine, 420CC Go Kart Motor 3600r/min Single Cylinder Gasoline Motor Engine with Air Cooling for Compressor, Lawnmower, Garden Tool Motors(Black)
- 【High-Quality and Durable Construction】420cc engine features high-quality aluminum-iron components with excellent impact and scratch resistance for extended service life. Precision-engineered sealed oil ports effectively prevent leakage while maintaining optimal lubrication. The smooth outer surface can be easily cleaned with just a soft cloth. This rugged engine is designed to withstand the rigors of continuous operation, ensuring you get reliable power without any compromise.
- 【Efficient Output】Go kart engine delivers a powerful 9700w power output with a maximum speed of 3600 rpm, giving you the strong power you need to easily handle heavy equipment and challenging jobs. The integrated high-precision carburetor system ensures optimal fuel combustion with fuel consumption as low as ≤374 g/kwh, while carefully balanced mechanical components ensure smooth and vibration-free operation. This engine provides consistent and reliable performance
- 【Fuel-Saving Technology】4 stroke 15hp gas engine is designed for maximum operating efficiency, with a large fuel tank with a capacity of up to 1.72 gallons (about 7.7 liters), which can significantly extend the working time between refueling. The advanced carburetor system optimizes fuel utilization, resulting in lower fuel consumption and lower operating costs, while the built-in low oil alarm provides critical protection against sudden engine shutdowns due to insufficient lubrication.
- 【Temperature Control】15hp gas engine horizontal shaft's innovative cooling system combines forced air cooling and carefully designed heat dissipation holes to maintain ideal operating temperatures even under long-term high-load operation. This dual cooling method effectively prevents overheating while extending the overall life of the engine. The efficient air filtration system prevents harmful debris from entering key components, minimizing wear.
- 【Versatile Applications】Gas engine features a universal design that makes it an ideal power source for a variety of equipment such as generators, water pumps, high-pressure washers, construction machinery and agricultural implements. Its user-friendly design includes an ergonomic pull handle for easy starting; the compact design allows for flexible installation in a variety of configurations. This engine provides a practical power solution for many applications.
Bestseller No. 5
BILT HARD Gas Engine Vertical Shaft, 173cc 4.4 HP 4-Stroke Gas Motor, Replacement Engine for Lawn Mower, EPA & CARB Compliant
- Unleash Dynamic Energy - Embrace the strength of a 173cc displacement 4-stroke vertical cylinder gas engine, boasting remarkable torque of 6.64 ft.lbs @2500 RPM. Capable of reaching a maximum speed of 3600 RPM, it's equipped with a staggering 4.4 maximum horsepower, all fueled by a 0.26-gallon tank.
- Precision Shaft Specifications - Dive into the specifics of our engine with a 7/8-inch diameter shaft measuring 3.16 inches in length. The end is meticulously tapped with 3/8-inch - 24 UNF threads, further enhanced by a 3/16-inch keyway. The mounting pattern spans 8 inches, while the engine features a 3/8"-24 UNF tapped hole and a 0.079 x 0.34-inch through-hole.
- Safety at the Forefront - Safety is paramount, evident in the built-in Force Air-Cooled, Splash Lubrication System, and Low oil shutoff function. Our engine spark plug system accommodates RA6HC/DCPR7E/DK7PTC spark plugs, offering a clearance of 0.027-0.031 inches. This engine is the perfect replacement for your lawnmower, ensuring a blend of power and security.
- Vital Note - Kindly note that our engine is shipped dry to ensure freshness. Before starting, be sure to add gasoline and engine oil correctly (please note, oil is not included).
- Certified Excellence - EPA and CARB Compliant. Our gas engine meets the highest standards of quality and compliance, proudly bearing both EPA and CARB certifications. Rest assured, each engine undergoes Oil Testing before packaging, so it may have a slight oily touch, signifying its 100% new condition.
Bestseller No. 6
Fenjidrop 10HP 4 Stroke Diesel Engine, 418CC Diesel Motor 3600RPM Air Cooling Recoil Heavy Duty Single Cylinder Small Diesel Engine for Tillers Generators Vehicles (10HP 418CC)
- 【Powerful and Efficient】: With a power of up to 6.3 kW and a speed of up to 3,600 rpm, this diesel engine provides you with a strong power to improve your work efficiency and save your time and energy.
- 【Easy to Use】: This diesel motor features a manual recoil starter, which is more convenient for you to operate, so that you can use it to work faster. In addition, the ergonomically designed knob can be positioned at any speed. It also comes with a throttle cable mounting bracket for installation as needed.
- 【Good Heat Dissipation】: The engine's forced air-cooling system and the dense cooling holes on the casing can dissipate heat quickly and in time, which not only prolongs the engine's service life, but also ensures that the engine won't stall even after long hours of operation.
- 【Large Capacity Fuel Tank】: The fuel tank of this diesel go kart engine can hold 1.45 gallons of fuel. This large capacity allows for continuous use with fewer interruptions, eliminating the need for frequent refueling.
- 【Stable Engine】: This small diesel engine keeps airborne contaminants out of the engine, improving engine performance and longevity. In addition, it features a single-valve direct fuel injection system that improves fuel utilization efficiency and reduces engine wear.
Bestseller No. 7
Aceup Energy 4.4HP 173cc Gas Engine Vertical Shaft, 4-Stroke Gas Motor with Primer for Lawn Mower
- Shaft 7/8" diameter ,3.16" long, end tapped with 3/8"- 24 UNF; Keyway 3/16"
- Small gas engine motor with recoil start, enrichment pump drive with primer
- Max torque 8.5 N.m/ 2500 RPM, Max load speed from 2500 to 2800 RPM, Max 4.4 HP 3600 RPM; 4 stroke air cooled OHV with recoil start, 0.9 gallon fuel tank
- Equipped with metal camshaft, forged crankshafts and cast iron cylinder liners to ensure superior performance and longer service life
- All our engines are tested in the factory to guarantee quality; EPA compliant; Backed by a 1 year limited warranty with free lifetime technical guidance from experts
$142.99
Buy on Amazon
Bestseller No. 8
njxbrek Diesel Engine, 5HP 4-Stroke Heavy Duty Diesel Motor, 247CC Single-Cylinder Air-Cooled Hand-Pull Start Diesel Engine for Agricultural Machinery
- Diesel Engine: It boasts a rated power of 4.05kw, a horsepower of 5hp, a displacement of 247cc, and a rotating speed of 3600r/min, providing strong power and ensuring that your work can be completed quickly and easily.
- Stable Running: The engine adopts a metal cam, forged crankshaft, and cast iron cylinder liner, ensuring superior performance and a longer lifespan. Start it manually and enjoy stable engine operation every time.
- Low Fuel Consumption: A quality air filter can prevent airborne impurities and dust from entering the engine interior, improving engine performance and extending service life. Moreover, it adopts a direct fuel injection system with good atomization, improving fuel utilization efficiency.
- Efficient Cooling System: The built-in forced air cooling system and exhaust vent on the silencer are designed to keep the motor cool and provide high reliability and durability.
- Application: This product is widely used in water pumps, pesticide sprayers, microtillers, grain harvesters, washers, generators, etc, as long as the crankshaft matches.
Bestseller No. 9
10HP Diesel Engine, 6300W 418CC Diesel Motor Engine 4 Stroke Heavy Duty Single Cylinder Air-Cooled Diesel Motor Vertical Shaft Diesel Engine for Tillers Generators Lawn Mower 3600RPM (10HP 6300W)
- High-quality Material: It is made of high-quality iron, aluminum, and die-casting aluminum, with a sturdy structure and good heat dissipation. The surface is treated with environmentally friendly spray molding technology, which can improve the corrosion resistance of the engine and extend its service life
- Powerful and Efficient: With a power of up to 6.3kw and a speed of up to 3,600rpm, this four-stroke engine can provide you with strong power to increase your productivity and save you time and energy
- Easy to Use: It adopts a manual recoil start method, which is more convenient for your operation and allows you to use it more quickly for work. Moreover, the ergonomic design knob can position at any speed. It is also equipped with a throttle cable mounting bracket, which can be installed as needed
- Good Heat Dissipation & Large Fuel Tank Capacity: The forced air-cooling system and the dense cooling holes in the casing dissipate heat quickly and promptly, which not only prolongs the engine's service life but also ensures that the engine will not stall even after a long period of operation. The fuel tank of this engine holds 1.45 gal of fuel. The large capacity allows you to use it continuously with fewer interruptions without the need for frequent refueling
- Stable Engine: A quality air filter can prevent airborne impurities and dust from entering the engine interior, improving engine performance and extending service life. Moreover, it adopts a single-valve direct fuel injection system, which can improve fuel utilization efficiency and reduce engine wear
Bestseller No. 10
LpqOxnm 4-Stroke Diesel Engine, 196CC 2.42KW 3.3HP Air Cooling Oblique Horizontal Engine Motor Singer-Cylinder Hand Start Diesel Motor Large Capacity Agricultural Horizontal Engines with Air Filter
- Large Capacity Tank: The fuel tank capacity of the diesel engine is 126.8oz, which can support you to work for a long time without the need for refueling frequently to improve your work efficiency. An oil tank with a strong seal is not easy to leak oil and cause waste.
- Strong Power: The full-copper engine with a high power of 2200w and a rotating speed of 3000r/min provides you with strong power and ensures that your work can be completed quickly and easily.
- Low Noise: High-quality muffler can effectively reduce noise (75 dB), protect your hearing and provide you with a comfortable and quiet working environment.
- Simple Operation: The manual starter allows the machine to be easily started by pulling the machine backward, which is ideal for novice operators.
- Fuel-saving & Money-saving: The diesel engine with the direct injection fuel system can fully burn diesel oil and have a good atomization during operation to cause a low fuel consumption rate (≤280g/ kw. h), which can save you fuel and money.
Best Replacement Outdoor Power Tool Engines Buying Guide
Before choosing the best replacement outdoor power tool engine you should consider the following options:
1. Horsepower: You should always consider horsepower when choosing a replacement engine.
You should pick an engine with the right horsepower for the job you want to accomplish. If you are using the engine for material handling applications, you should consider the torque and horsepower of the engine.
A higher horsepower engine will have a higher level of power and torque to accomplish the job.
2. Displacement: Displacement is another important factor to consider when buying an engine. Displacement refers to the amount of space an engine has for the combustion of air and fuel.
The larger the displacement, the bigger the engine and the more power it will have.
3. RPM: RPM stands for rotations per minute and refers to how fast the engine can spin.
You should make sure the engine you want to buy can spin at the right rate for the job you want to accomplish. In cases where the engine will be used for something like powering a woodworking machine or a drill, you should look for an engine with a higher RPM rate.
4. Fuel Efficiency: You should also consider the fuel efficiency of an engine when shopping for a replacement engine.
The higher the fuel efficiency, the more money you will save in the long run. You can calculate the fuel efficiency of an engine by dividing the output horsepower by the fuel flow rate.
What else you should know about the best replacement outdoor power tool engines
1. What are the best replacement outdoor power tool engines?
Some of the more popular and well-reviewed replacement engines include those made by Briggs & Stratton, Honda, and Kawasaki.
2. What are the most durable outdoor power tool engines?
Such as the quality of the engine, the type of power tool it is used in, and how it is used and maintained. However, some of the most durable outdoor power tool engines are those made by manufacturers such as Honda, Briggs & Stratton and Kawasaki.
3. What are the most powerful outdoor power tool engines?
The most powerful outdoor power tool engines are typically found in industrial-grade equipment such as generators, pumps, and pressure washers. These engines are designed to deliver high levels of power and torque, and can typically handle heavy-duty applications.
4. What are the most fuel-efficient outdoor power tool engines?
Some of the most fuel-efficient outdoor power tool engines include those that are designed specifically for use with ethanol-blended fuel, as well as those that feature advanced fuel injection technology. Other fuel-saving features that can be found on some outdoor power tool engines include automatic idle control and variable speed settings.
5. What are the quietest outdoor power tool engines?
The quietest outdoor power tool engines are those that have been specifically designed to minimize noise. There are a number of different manufacturers that offer outdoor power tools with Quiet Technology, and these are typically the best options for those who are looking for a quiet engine.
Conclusion
On the market, there are numerous best replacement outdoor power tool engines. Hopefully, the list of the top ten best replacement outdoor power tool engines will save you time researching and deciding on the best one for you.