A gasoline pressure washer pump is the heart of a pressure washer, responsible for generating the high-pressure water stream that enables effective cleaning of various surfaces. This comprehensive guide delves into the key features, technical specifications, and maintenance requirements to help you make an informed decision when selecting and maintaining a gasoline pressure washer pump.
Key Features to Consider
Flow Rate (GPM)
The flow rate, measured in gallons per minute (GPM), determines the volume of water the pump can handle. Higher flow rates are suitable for heavy-duty cleaning tasks, allowing you to cover more surface area in less time. Typical flow rates for gasoline pressure washer pumps range from 2.9 GPM to 20.0 GPM, depending on the pump model and application.
Pressure (PSI)
The pressure, measured in pounds per square inch (PSI), affects the force of the water stream. Higher pressures are needed for tougher cleaning jobs, such as removing stubborn dirt, grime, or paint. Gasoline pressure washer pumps can deliver pressures ranging from 1200 PSI to 4000 PSI, with the higher end of the spectrum suitable for industrial or commercial use.
Shaft Size
The shaft size, typically 1 inch or 24 mm, affects the compatibility of the pump with engines and drive systems. Ensuring the correct shaft size is crucial for a secure and efficient connection between the pump and the power source.
Engine Horsepower
The engine horsepower directly impacts the pump’s performance, with higher horsepower engines capable of producing higher pressures. For example, the EnviroSpec pumps require an 18 HP engine to achieve 5.6 GPM at 4000 PSI, while a 13 HP Honda or 14 HP Kohler engine can power the same pump to deliver 5.6 GPM at 2800 PSI.
Drive System
The drive system, whether belt or gear drive, influences the pump’s efficiency and performance. Belt-driven pumps are generally more affordable and easier to maintain, while gear-driven pumps offer higher efficiency and longer lifespan, but at a higher cost.
Technical Specifications
EnviroSpec Pumps
- 5.6 GPM @ 4000 PSI (requires 18 HP engine)
- 5.6 GPM @ 2800 PSI (with 13 HP Honda or 14 HP Kohler engine)
- 5.5 GPM @ 4000 PSI
- 5.6 GPM @ 3500 PSI (with gear drive)
Amazon Options
- TOOLCY Pressure Washer Pump: 4.2 GPM @ 4000 PSI
Power Wash Store Options
- CAT Pump: 2.9 GPM @ 2700 PSI, 4.5 GPM @ 3500 PSI, 5.5 GPM @ 3500 PSI
- General Pump: 5.0 GPM @ 2500 PSI, 5.0 GPM @ 3000 PSI, 17.0 GPM @ 1200 PSI, 20.0 GPM @ 1200 PSI
- Udor Solid Shaft Series Pump: 12.5 GPM @ 2500 PSI
- Legacy HD Pump: 3.5 GPM @ 4000 PSI, 4.0 GPM @ 3000 PSI, 4.8 GPM @ 3500 PSI
Maintenance and Storage
Regular Oil Changes
Ensure the pump’s longevity by changing the oil regularly, as recommended by the manufacturer. This helps to maintain the pump’s internal components and prevent premature wear.
Cleanliness
Keep the pump and surrounding area clean to prevent debris buildup, which can compromise the pump’s performance and lifespan. Regularly inspect the pump for any signs of dirt, grime, or foreign objects and clean as necessary.
Storage
Store the pump in a dry, protected area to prevent damage from the elements, such as moisture, dust, or extreme temperatures. This helps to maintain the pump’s condition and ensures it is ready for use when needed.
Winterization
Winterize the pump by draining the water and adding a pump saver solution to prevent corrosion and freezing during the colder months. This simple step can extend the pump’s lifespan and ensure it is ready for use in the next season.
References
- EnviroSpec – Popular Pressure Washer Pumps: https://envirospec.com/envirospec-catalog/popular-pressure-washer-pumps/
- Amazon – Pressure Washer Pumps: https://www.amazon.com/Pressure-Washer-Pumps-Gasoline-Parts-Accessories/s?rh=n%3A13400441%2Cp_n_power_source_browse-bin%3A492228011&c=ts&ts_id=13400441
- Power Wash Store – Pressure Washer Pumps & Kits: https://www.powerwashstore.com/C/300/PumpsKits