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. 2
BILT HARD 420cc 15HP Gas Engine with Electric Start, Horizontal Shaft 4 Stroke OHV Gas Motor, Gas Powered Multi-Use Engine
- POWERFUL ENGINE - Our 420cc displacement 4-stroke horizontal cylinder gas engine has a max torque of 18.45ft.lbs @2500RPM, max 3800 RPM speed, 15 maximum horsepower, 1.2 gal fuel tank. Built to meet & exceed industrial grade quality standards & provide dependable performance. The engine is shipped dry so make sure you add gasoline and engine oil correctly before starting (not included).
- SHAFT SPECS - 1 in Diameter, 3.48 in Length, end tapped with 3/8 in.-24 UNF; Keyway 1/4 in; Mounting pattern 7.72" L x 3.39" W-4.06" W. Durable design runs quiy and provides smooth operation.This engine spark plug system can take Torch: F6TC spark plugs, with a clearance of: 0.027-0.0.31 in. The engine runs on a minimum 87+ unleaded gasoline (ETHANOL＜10% recommended).
- SAFETY & WIDELY APPLICATIONS - Built-in Force Air-Cooled and Splash Lubrication System, keeping the motor cool during extended use of time and ensure the operator's safety. A low oil shutoff functionality turns the engine off to prevent serious damage or failure. It's the perfect replacement engine for cement mixers, compressors, mowers, log splitters, vacuums, tillers, water pumps, chipper/shredders and blowers.
- GREAT REPLACEMENT - Our 420cc 15HP Horizontal Engine is a great replacement for your Honda GX340, 389cc, GX390, 389cc, Briggs & Stratton GX340, 389cc, GX390, 389cc, Kohler CH440, 429cc, ECH440, 429cc, ECH440LE, 429cc, Yamaha MZ360, 357cc, MX360, 358cc, MX400, 402cc etc.
- KINDLY NOTED- with EPA compliant, each gas engine will be Oil Tested before packaging, so it may touch a little oily, but 100% new condition.
Bestseller No. 3
Knwigoe 4 Stroke Gas Engine Motor 212cc 7.5HP Go Kart Engine Pull Start Mini Bike Motor with Air Cooling System & Air Filter for Go Kart Lawn Mower Log-Splitter
- Long service life: This 212cc engine is made of iron and aluminum, with high hardness and good anti-rust performance, and can be used for a long time. It has a high-quality starter and cast iron cylinder liner, which makes the engine work stably and effectively to avoid jamming.
- Powerful: The go kart engine with a strong power of 3000W and a rated speed of 3600 rpm, it can withstand the heavy load of water pumps, vibrators, generators and high-current power tools.
- Large fuel tank: Our go kart motor has a large fuel tank capacity of 0.95gal and is equipped with a high-precision carburetor to improve combustion efficiency, thereby reducing fuel consumption and enabling it to work for a long time.
- Good heat dissipation effect: The forced air cooling system and heat dissipation holes can timely reduce the temperature of the gas motor, extend the service life of the mini bike motor, and reduce safety hazards. The gas engine motor uses a high-quality muffler to effectively reduce noise and provide you with a comfortable working environment.
- Humanized design:The small engine equipped with a low oil level warning light to remind you to refuel in time, and the low oil level automatically stops. Use the manual starter to pull back and start easily. In addition, use a ratchet socket combination or a simple T-handle socket extension tool to easily reach the spark plug position.
Bestseller No. 4
YUNLAIGOTOP Gas Engine Motor, 7.5HP 4-Stroke Gas Powered Engine with Air Cooling & Air Filter, 3000W Gas Powered Engine for Go-Karts, Minibikes, Lawnmowers, Log-Splitter
- 【HIGH QUALITY & STABLE OPERATION】- This 7.5HP 4-Stroke Gas Powered Engine is made of iron and aluminum, with high hardness properties. It has a high-quality starter and cast iron cylinder liner, which makes the engine work stably and effectively to avoid jamming
- 【EXCELLENT EFFICIENCY】- The go kart engine has a strong power of 3000W and a rated speed of 3600 rpm, so it can handle heavy loads from water pumps, vibrators, and high-current electric tools
- 【LARGE FUEL TANK & LOW FUEL CONSUMPTION】- The fuel tank of the go kart motor has a large capacity of 0.95gal, enabling it to work for a long time. It is equipped with a high-precision carburetor, which improves the combustion efficiency, thus reducing fuel consumption
- 【HUMANIZED DESIGN】- The small engine is equipped with a low oil alarm light that can alert you to add oil in time and a low oil automatic shutdown, helping your engine run year after year. The spark plug placement is easy to reach with a ratchet-socket combo or a simple T handle socket extension tool
- 【WIDE RANGE OF APPLICATIONS】- The 7.5hp gasoline engine is suitable for water pumps, vibrators, dosing machines, puffers, threshers, recreational vehicles, construction, farm/ranch, pressure washers, air compressors, trenchers, concrete/mortar mixers/saws, go-karts, minibikes, lawnmowers, log-splitter, vacuums, etc
Bestseller No. 5
OCASAMI 420CC 15HP Gas Powered Engine, 4 Stroke Go Kart Engine OHV Horizontal Shaft Gasoline Motor Engine Pull Start Go Kart Motor Air Cooled Single Cylinder Engine with Manual Recoil Starter (Black)
- 【Low Fuel Consumption】This 420cc 15hp gas powered engine uses an overhead valve, which can effectively help reduce carbon deposits and significantly improve fuel savings. Its air filter can also improve air filtration performance and reduce wear. Both can help you save a lot of fuel costs. It widely used in karts, compressors, trenchers, generators, high-pressure washers, cement mixers, etc.
- 【Powerful Power】This 4 stroke go kart engine uses a four-stroke engine. It can be easily started manually and runs stably. It has a strong 15hp horsepower, a displacement of 420cc, and a speed of 3600rpm, which provides you with strong power and ensures that your work can be completed quickly and easily, so you can save a lot of energy when using it.
- 【Safe and Reliable】This ohv horizontal shaft gasoline motor's built-in forced air cooling system and ventilation radiator are designed to keep the motor cool and provide high reliability and durability. It is equipped with an oil level alarm, and if not enough oil is added before starting, the machine will automatically shut down to protect the machine. Therefore, the machine is not easy to damage and has a longer service life.
- 【 4 Stroke Go Kart Engine】This air cooled single cylinder gas engine has a large fuel tank capacity of 1.7 gallons, which can work for a long time and avoid the trouble of frequent refueling. And it comes with a muffler, which has a good noise reduction effect and can create a quiet working environment for you. In addition, it also comes with a speed lever. By moving this lever, you can change the engine speed to adapt to different usage scenarios.
- 【Comfortable Handle】The ergonomic t-shaped starting handle of this pull start go kart motor provides a force point for easy and comfortable starting. And when the engine is cold started, closing part of the air intake properly can increase the gasoline concentration of the mixture entering the cylinder and improve the engine starting performance.
Bestseller No. 6
TOOLCY 212CC 7HP Gas Engine, 4 Stroke OHV Engine with Oil Sensor, Horizontal 3/4" Shaft, Replacement Gas Motor for Power Washer Pressure Washers, Easy Recoil Start, 1-13/20" Long, Keyway 3/16"
- [Specification]: Shaft size: 3/4" diameter, 1-13/20" long, end tapped with 5/16"- 24 UNF, keyway 3/16". Compatible with Honda, Briggs & Stratton 6/6.5/7/7.5 hp, 140cc-212cc engine. Primarily used with gas pressure washers, snow blowers, etc. Does NOT fit go-karts or plate compactors.
- [Fast & Continuous Power]: Equipped with 3600RPM, 7 horsepower with easy recoil starter, TOOLCY 4-stroke 212cc gas engine delivers exceptional performance to get the job done quickly, support for about 2 hours of continuous use. Fuel Tank: 0.8 gal.
- [Advanced Oil Sensor]: Built-in intelligent oil sensing prevents the engine from pulling cylinders due to lack of oil, helping to extend the life of the gas engine.
- [Efficient Fuel Utilization]: Complies with EPA standards. OHV design captures and reuses energy during braking for lower fuel consumption, lower operating temperature and higher power. At the same time. Air filters reduce wear and improve air filtration performance.
- [Please Note]: All engines are tested at the factory to ensure quality, so some engines may have an oily residue due to testing, but rest assured, they are 100% new. (Engine oil is NOT included.)
$169.99
Buy on Amazon
Bestseller No. 7
DSHOHCL 7.5HP Gas Engine Motor, 212cc 4 Stroke Go Kart Engine, Industrial Grade Engine Gas Powered Engine for Go-Karts, Lawnmowers, Log-Splitters, Shaft 25/32" Diameter, 2" Long, 3/16" Keyway
- Sufficient Power: The Go Kart Engine delivers robust performance with 3000W of power and a rated speed of 3600 rpm, making it capable of handling demanding loads from water pumps, vibrators, generators, and high-current electric tools.
- Large Fuel Tank: Featuring a substantial 0.95-gallon fuel tank, the 7.5HP Gas Engine Motor ensures extended operation without frequent refueling, saving you time and maintaining efficiency.
- Low Fuel Consumption: The Go Kart Engine is equipped with a high-precision carburetor that enhances combustion efficiency, resulting in lower fuel consumption for a more energy-efficient and eco-friendly operation.
- Effective Heat Dissipation: With a forced air cooling system and heat dissipation holes, the 7.5HP Gas Engine Motor maintains optimal motor temperature, extending its lifespan and minimizing safety risks.
- User-Friendly Design: The Go Kart Engine includes a low oil alarm light and automatic shutdown feature to prevent damage from low oil levels, while its spark plug is easily accessible with standard tools for convenient maintenance.
Bestseller No. 8
OCASAMI Go Kart Engine Motor, 4-Stroke Engine Motor Gas Powered Engine with Air Cooling System Recoil/Pull Start Mini Engine Motor 25° Geneigter Einzylinder Gasoline Engine Motor（ 7.5 HP, 210CC）
- 【High performance】This 7.5 hp 4-stroke engine motor is powerful and can convert internal energy into kinetic energy faster. Because the size and mass of the gasoline engine are smaller than the diesel engine of the same power. It also has good torque, better starting and acceleration characteristics, lower operating noise and lower manufacturing costs.
- 【High-quality drive system】Before putting it into mass production, we conducted a 100-hour durability test on the 210cc go kart engine motor to ensure that each engine has a high-quality transmission system. And the test results show that the wear of the machine is very small, which shows that the service life of the engine can be longer.
- 【Air filter】The air filter gasket of this gas powered engine with air cooling system is made of rubber, which makes the carburetor tighter and better. It can improve air filtration performance, reduce wear, and help you save a lot of fuel costs. And its chassis fuel tank capacity is up to 3.6 liters, avoiding the trouble of frequent refueling.
- 【Heat resistance】This recoil/pull start mini engine motor will emit a lot of heat during operation. However, after 100 hours of durability testing, the engine was not damaged by high temperature. This shows that the materials we use are heat-resistant and you can use it with confidence.
- 【Wide application】This 25° geneigter einzylinder gasoline engine motor has a muffler inside. This significantly reduces the noise during operation and can give you a good use experience. It is widely used in aircraft, automobiles, racing boats, racing cars, small agricultural machinery, garden machinery, etc.
Bestseller No. 9
SEANESZTI 4 Stroke GX160 Gas Engine, 200CC 6.5HP Gasoline Engine Motor, Shaft 20mm Diameter OHV Industrial Grade Gas Powered Motor for Go Kart Compressor Log Splitter Lawn Mower Mini Bike
- ✅【Durable】: The gas engine is made of high quality aluminum body, iron shaft, cast iron cylinder head and iron fuel tank, which is strong and durable. The metal material and forged crankshaft make it more powerful, and the built-in air cooling system and ventilated heat sink provide high reliability and durability.
- ✅【Powerful】: With engine power of up to 3kw and speeds of up to 3600r/min, our engines produce great power to help you get the job done fast and well. The product is equipped with a silencer, which has a good noise reduction effect. The engine strives to create a quiet working environment for you.
- ✅【Large fuel tank & Low fuel consumption】: The gas powered motor has a large 6.5 liters/1.72 gallons fuel tank, which can work for a long time. You don't need to refill the tank as often, and the OHV overhead valves effectively help reduce carbon buildup and significantly improve fuel efficiency. You'll also save big on fuel costs.
- ✅【High safety】: The gasoline engine is equipped with an oil alarm. If enough oil is not added before starting, the machine will automatically shut down to protect it. In addition, the cast iron cylinder liner makes the engine run smoother, the overall performance is more stable, the machine is not easy to be damaged, and the service life is longer.
- ✅【Easy to operate】: The hand pull starter adopts ergonomic plastic handle, and the body adopts integrated design, which does not need to be assembled separately. All you need to do is install it on the machine and start using it.
SaleBestseller No. 10
Briggs and Stratton 33S877-0019-G1 Simpson Intek Series, 19 HP, 540 cc, Single Cylinder Engine, Black
- 9 amp charging system
- Full pressure lubrication with oil filter
- Pulse fuel pump
- Overhead valve design (OHV) for cooler operation and long valve life
- Includes exhaust
- Dura-Bore cast iron cylinder sleeve for extended life
- 3300 max RPM
- Electric start
- For riding lawn mowers
- Replaces engine model 33R877-0003-G1
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.