OEM AR 7/8″ Shaft 2600 PSI Gas Pressure Washer Pump ROP

Description

Product Overview

The OEM AR 7/8″ Shaft 2600 PSI Gas Pressure Washer Pump is a precision‑engineered component designed to replace the original pump on Briggs & Stratton gas‑driven pressure washer units. Constructed from high‑grade steel, the pump housing and internal pistons are machined to exact tolerances, providing a robust, leak‑free seal that can withstand the demanding pressures of up to 2600 PSI. The 7/8″ shaft diameter matches the standard engine output shaft for Briggs & Stratton models, and the three‑bolt mounting pattern (7 11/16″ × 6 3/16″ × 6 7/16″) ensures a secure, vibration‑free connection. A built‑in thermal release valve automatically shuts off flow when fluid temperature exceeds 140 °F, protecting both the pump and the engine from overheating. The pump also includes a chemical injector port, allowing users to add detergents or surfactants directly into the water stream for enhanced cleaning performance. With a maximum flow rate of 2.2 GPM, this pump delivers a balanced combination of pressure and volume, making it suitable for a wide range of residential and light‑commercial cleaning tasks.

Usage

This pump is intended for vertical gas engine‑driven pressure washers, particularly those built around the Briggs & Stratton 202274GS engine series. It excels in typical outdoor cleaning scenarios such as driveway washing, deck and patio surface restoration, vehicle rinsing, and garden equipment maintenance. The pump’s 2600 PSI rating provides enough force to dislodge stubborn grime, while the 2.2 GPM flow rate ensures sufficient water coverage to rinse away debris without excessive water consumption. Because the pump mounts directly onto the engine shaft using a keyed hollow shaft connection, installation is straightforward for anyone with basic mechanical skills. The pump’s compact dimensions (13 × 8 × 8 in) allow it to fit within the limited space of most portable pressure washer housings, and its 5‑pound weight makes it easy to handle during replacement or transport. Users should always verify that the pressure washer’s hose and nozzle are rated for the pump’s maximum pressure, and they should avoid exceeding the 2600 PSI limit to prevent premature wear.

Why Choose Us

Choosing the OEM AR 7/8″ Shaft pump from The ROP Shop means selecting a part that is built to the exact specifications of the original equipment manufacturer, guaranteeing a perfect fit and reliable operation. Our pumps undergo rigorous quality‑control testing, including pressure endurance, flow consistency, and thermal protection verification, to ensure they meet or exceed OEM performance standards. The use of premium steel and precision machining reduces the risk of premature wear, corrosion, or leakage, extending the service life of the entire pressure washer system. In addition, each pump is shipped with a pre‑installed thermal release valve and chemical injector, eliminating the need for aftermarket modifications. We stand behind our products with a comprehensive warranty and responsive customer support, offering technical assistance, installation guidance, and parts replacement when needed. By investing in this pump, customers benefit from reduced downtime, lower long‑term maintenance costs, and the confidence that comes from using a component that matches the original design intent.

Key Features

• High‑grade steel construction delivers exceptional durability and resistance to corrosion.
• 2600 PSI maximum pressure provides powerful cleaning capability for tough outdoor grime.
• 2.2 GPM flow rate balances pressure and water volume for efficient rinsing.
• Integrated thermal release valve protects the pump and engine from overheating.
• Includes chemical injector for easy addition of detergents, enhancing cleaning performance.
• Keyed 7/8″ shaft and three‑bolt mounting pattern ensure a secure, vibration‑free fit.
• Compact size and lightweight design simplify installation and transport.
• Backed by a manufacturer warranty and dedicated after‑sales support.

FAQ

What engines are compatible with this pump?

The pump is designed for vertical gas engines that use a 7/8″ keyed hollow shaft, specifically Briggs & Stratton models such as the 202274GS series. Verify the engine’s shaft size and bolt pattern before purchase.

Can I use this pump with a diesel‑powered pressure washer?

No. This pump is engineered for gas‑driven units and the mounting interface, pressure rating, and thermal protection are optimized for gasoline engine operation. Using it on a diesel engine could lead to improper fit or performance issues.

How do I install the pump safely?

First, disconnect the engine and relieve any stored pressure. Align the keyed shaft of the pump with the engine’s hollow shaft, insert the pump, and secure it with the three bolts using the specified pattern. Re‑attach hoses and test at low pressure before full operation.

What maintenance does the pump require?

Regularly inspect the pump for signs of wear, check the thermal release valve for proper operation, and replace seals or O‑rings as needed. Keep the pump clean of debris and avoid running it above the rated 2600 PSI to prolong its lifespan.

Is there a warranty on this product?

Yes, the pump comes with a manufacturer warranty that covers defects in materials and workmanship. For detailed warranty terms and support contact information, please refer to the product packaging or visit our website.