1 6
Product / Pressure Washers / 85.570.150

Powerease R420 Engine – 420cc, 12.6 HP, 1" Horizontal Shaft

Powerease R420 Engine – 420cc, 12.6 HP, 1" Horizontal Shaft

Specifications

ENGINE

Powerease R420

CC

420CC

ENGINE START

Recoil

Horse Power

15 HP / 17.8 FT/LB

Bore X Stroke

88 mm x 64 mm

Net Power Output

12.6 HP (9.4 KW) @ 3,600 RPM

Net Torque

17.8 LB-FT (24 NM) @ 2,500 RPM

Shaft Rotation

Counterclockwise

Shaft Orientation

Horizontal

Lubrication System

Splash

Carburetor

Horizontal Type Butterfly Valve

Compression Ratio

8.2:1

Ignition System

Transistorized Magneto

Oil Capacity

1.1 L (1.16 U.S. QTS)

Shaft Size

1" Keyed

View full details

PRODUCT

DESCRIPTION

Heavy Duty Power You Can Count On

The Powerease R420 Engine is a tough, high displacement motor for equipment that needs strong and steady power. With a 420cc displacement and 12.6 horsepower, this engine is built to perform in professional and industrial applications. From construction sites to farm fields, the R420 has the torque, durability and dependability to keep your equipment running smooth.

For over a decade Powerease engines have powered BE Power Equipment products and have earned a reputation for reliability and efficiency. Built with a robust OHV (Over Head Valve) design, large capacity fuel tank and simple maintenance layout the R420 continues this legacy as a trusted engine replacement or upgrade option across multiple industries.

Features

  • Model: 420

  • Engine Type: Air Cooled, 4 Stroke OHV

  • Displacement: 420cc

  • Net Power Output: 12.6 HP (9.4 kW) @ 3,600 RPM

  • Net Torque: 17.8 lb-ft (24 Nm) @ 2,500 RPM

  • Starting System: Recoil

  • Ignition System: Transistorized Magneto

  • Compression Ratio: 8.2:1

  • Fuel Tank Capacity: 6.7 L (1.77 gal)

  • Fuel Type: Regular unleaded 86 octane or higher (ethanol blends up to 15% acceptable)

  • Carburetor: Horizontal type butterfly valve

  • Lubrication System: Splash

  • Oil Capacity: 1.1 L (1.16 US qts)

  • Low Oil Shutdown: Yes, automatic protection

  • Shaft Size: 1" keyed, horizontal orientation

  • Key Way Size: 1/4" x 2.2"

  • Shaft Rotation: Counterclockwise

  • Air Cleaner: Dual-element filtration system

  • Dry Weight: 68 lbs

Built for Tough Applications

The R420’s 12.6 HP and 17.8 lb-ft make it a heavy duty engine for machines that need continuous power. The air cooled, 4 stroke OHV design runs cooler and more efficient, extending overall life and reducing fuel consumption.

The 1” keyed horizontal shaft fits most equipment, making this engine a replacement option for many machines in the field. Whether you need to restore old equipment or power new builds the R420’s power will run smooth in any condition.

Field Serviceable

The R420 was designed with user serviceability in mind. Key service parts like the air filter, spark plug and carburetor are located for quick and easy access so you can service in the field without down time.

The dual-element air cleaner provides better filtration in dusty environments, protects the engine from debris and extends operating life. With the splash lubrication system and automatic low oil shutdown this engine is built to run safe and reliable with minimal risk of damage.

Fuel and Oil

The Powerease R420 runs on regular unleaded gasoline 86 octane or higher. For best performance and longevity use ethanol free fuel but ethanol blends up to 15% are acceptable.

The oil system takes 1.1 L (1.16 US qts) of oil. The integrated low oil sensor will shut down the engine when oil levels get too low preventing costly repairs and extending the engine’s life.

Applications

The R420 is designed for versatility and high performance across multiple industries. Its size, torque and power make it a great choice for:

  • Pressure Washers – High output cleaning machines that need continuous and stable power.

  • Water Pumps – For irrigation, flood control or construction dewatering.

  • Air Compressors – For shop and field work.

  • Lawn & Garden Equipment – Strong enough to power large tillers, mowers and other heavy duty tools.

  • Construction Equipment – For generators, compactors and job site machinery where power is a must.

Specifications

  • Model: Powerease R420

  • Displacement: 420cc* Bore x Stroke: 88 mm x 64 mm

  • Compression Ratio: 8.2:1

  • Net Power Output: 12.6 HP @ 3,600 RPM

  • Net Torque: 17.8 lb-ft @ 2,500 RPM

  • Fuel Tank Capacity: 6.7 L (1.77 gal)

  • Oil Capacity: 1.1 L (1.16 US qts)

  • Air Cleaner: Dual-element

  • Dry Weight: 68 lbs

  • Shipping Weight: 77 lbs

  • Unit Dimensions (LxWxH): 17" x 18" x 18"

  • Shipping Dimensions (LxWxH): 20" x 17" x 20"

The product may vary from the images on the website.

Professional Grade

Powerease engines have powered BE Power Equipment machines for over 10 years, earning a reputation for power, reliability and cost effectiveness. The R420 continues this legacy, with the kind of horsepower and torque professionals demand every day.

Whether you’re running commercial grade pressure washers, keeping construction equipment running or driving large agricultural tools the Powerease R420 Engine is built to perform. Reliable, serviceable and strong the R420 will get the job done.

Compare Pressure Washer

Frequently Asked Questions about Pressure Washers

How to store a pressure washer?

To ensure the durability of your heavy duty pressure washer:

  • Empty the gas tank to prevent fuel from degrading or clogging the engine.
  • Empty the pump and hoses of any remaining water.
  • Perform necessary maintenance before storage.
  • Store in a dry area.
  • Cover.

What is a pressure washer?

A power washer is a cleaning machine that uses a gasoline engine to power a high pressure water pump and nozzle. It’s used to clean driveways, decks, vehicles, outdoor furniture and more by spraying water at high PSI to remove dirt, grime, mold and other debris.Many models also come with a detergent tank for added cleaning power.

How does a power washer work?

A power washer works by drawing water from a connected hose and pumping it through a high pressure nozzle. The gas engine powers the pump which pressurizes the water and then expels it through the nozzle at high speed to clean the surface. The water pressure is measured in PSI (pounds per square inch) and the flow rate is measured in GPM (gallons per minute).Many models also feature adjustable water pressure settings to cater to different cleaning needs. BE makes pressure washing easy with models available for light jobs and heavy duty commercial cleaning projects.

Gas vs Electric power washers?

The main difference is that a gas pressure washer, known for its cleaning power, is powered by a gasoline engine, making it more powerful and portable, while an electric pressure washer is powered by electricity and is generally quieter and lighter.

Gas pressure washers are for heavy duty and large areas due to their durability, whereas electric pressure washers are for smaller jobs.

Your BE electric pressure washer is perfect for smaller jobs and built for portability, and we offer a wide range of electric models. Included with our electric models is a long extension cord for use anywhere around your house.

What to consider?

When choosing a gas pressure washer consider:

  • Pressure (PSI): More PSI means more cleaning power but also more potential for damaging delicate surfaces.
  • Flow Rate (GPM): More GPM means faster cleaning as more water is dispensed.
  • Engine Power: Bigger engines mean more durability and power.
  • Portability: Weight, handle design and wheel size for easier to move.
  • Nozzles: Multiple spray nozzles to adjust the spray pattern for different tasks.
  • Adjustable Nozzle: Allows for fine-tuning the spray intensity and pattern for various cleaning needs.

How much pressure do I need for?

The required pressure (PSI) and cleaning power depend on the surface you’re cleaning:

  • Light duty (car washing, outdoor furniture): 1,300-1,800 PSI.
  • Medium duty (patios, fences, decks): 2,000-3,000 PSI.
  • Heavy duty (driveways, brick walls, large equipment): 3,000+ PSI.

Many pressure washers come with adjustable pressure settings to handle different cleaning tasks effectively.

Can a pressure washing damage surfaces?

Yes, a power washer can damage surfaces if used incorrectly. High pressure water can strip paint, dent soft surfaces or even cause structural damage if the pressure is too high or the nozzle is held too close to the surface. Always use the right PSI for the material you’re cleaning and keep a safe distance from delicate surfaces.

To prevent damage, consider using a model with adjustable pressure settings.

How to maintain your pressure washer?

To ensure the durability and smooth operation of a pressure washer:

  • Change the oil as per manufacturer’s instructions.
  • Clean or replace the air filter to ensure good airflow.
  • Inspect and clean the nozzle regularly to prevent clogs.
  • Drain the gas tank if you’re storing the washer for a long time.
  • Check the hoses for leaks or damage and replace them if needed.
  • Follow regular maintenance requirements to keep the washer in optimal condition.

Can I use a pressure washer in cold weather and low water temperature?

You can use a pressure washer in cold weather but it’s more difficult. The water flow rate in the hoses and pump can freeze and damage the equipment. If you plan to use your pressure washer in cold temperatures make sure to winterize it and store it in a warm area when not in use. You can also use anti-freeze solutions for pressure washers.

Some models are designed to use hot water, which can be particularly effective for cleaning in cold weather.

Do I need any accessories?

Common accessories for power washers: