The Simpson MS60763-S is a premium pressure washer designed for a variety of cleaning tasks. It is a robust piece of equipment, featuring a high-pressure pump driven by an engine, and is designed for outdoor use.
Function Description:
The primary function of the Simpson MS60763-S pressure washer is to increase the pressure of a water supply, allowing for effective cleaning of various surfaces. It achieves this by using a high-pressure pump powered by an internal combustion engine. The pressurized water is then delivered through a high-pressure hose to a spray gun and wand, where the flow rate, direction, and pressure can be controlled using quick-connect nozzles. The unit also incorporates a detergent injection system, which mixes cleaning agents with the water to enhance cleaning effectiveness. This system is designed for low-pressure application of chemicals. A thermal relief valve is included to prevent pump overheating by releasing a spray of water if the internal temperature rises too high.
Important Technical Specifications:
- Model: MS60763-S
- PSI Max: 3000 PSI (Pounds per Square Inch)
- GPM Max: 2.4 gpm (Gallons per Minute)
- High Pressure Hose: 25 ft. (7.6 m)
- Pressure of Inlet Water: 20-100 PSI
- Inlet Water Temperature: Cold tap (100 °F max)
- Soap Consumption Rate: 10% max
- Engine: Drives the high-pressure pump. Specific engine details are referred to in the Engine Owner's Manual.
- Fuel Type: Unleaded gasoline with a pump octane rating of 86 or higher. Crucially, it should not use fuel containing greater than 10% ethanol, as this can damage the unit and void the warranty.
- Water Supply Requirements: Minimum of 20 PSI and 5 Gallons Per Minute. Maximum garden hose length of 30 ft. (9 m) for well water sources.
Usage Features:
- Assembly: The unit requires some assembly, including attaching the handle to the frame, connecting the spray wand to the gun, and attaching the high-pressure hose to the gun. Quick-connect nozzles are provided for easy attachment to the spray wand.
- Starting Procedure: Before starting, users must add oil (engine is shipped without it) and fresh, high-quality unleaded gasoline. The water source must be connected and turned on, and all air must be purged from the pump and high-pressure hose by depressing the trigger until a steady stream of water is present. The engine is started by moving the choke lever to the CHOKE position and pulling the recoil starter grip. Once the engine starts, the choke lever is gradually moved to the FAST position.
- Nozzle System: The pressure washer uses quick-connect nozzles, which are color-coded to indicate different spray patterns and recommended uses.
- 0° (Red): Powerful pinpoint for spot cleaning of hard, unpainted surfaces or high-reach areas. Not for use on wood.
- 15° (Yellow): Intense cleaning of unpainted hard surfaces (grills, driveways, concrete, brick walkways, unpainted brick or stucco).
- 25° (Green): Intense cleaning of larger areas (metal, concrete, wood).
- 40° (White): Cleaning of painted or delicate surfaces (Auto/RV, marine, wood, painted brick and stucco, vinyl, painted siding).
- Low Pressure (Black): Applies cleaning solutions. Safe on all surfaces, but compatibility of cleaning solution should be verified.
- Detergent Injection System: A detergent siphon hose with a filter is used to draw cleaning solutions from a container into the pump. This is a low-pressure operation, and only soaps and chemicals designed for pressure washer use should be used. Bleach is explicitly prohibited.
- Pressure Adjustments: Pressure is factory preset. To lower pressure, users can increase distance from the surface or switch to the 40° (white) nozzle. Attempting to increase pump pressure is not recommended and can damage the pump.
- Bypass Mode: Allows water to recirculate within the pump when the gun trigger is not pulled, enabling repositioning without turning off the engine. However, the unit should not run in bypass mode for more than two minutes to prevent overheating and pump damage.
- Safety Features: Includes a trigger lock on the spray gun to prevent accidental operation. Users are warned about the risks of carbon monoxide poisoning, fluid injection, hot surfaces, electrical shock, chemical burns, bursting (from over-inflated tires), and injury from lifting. Personal protective equipment (ANSI-approved Z87.1 safety glasses, protective clothing) is recommended.
Maintenance Features:
- Engine Maintenance: Users are directed to consult the Engine Owner's Manual for specific engine maintenance recommendations.
- Pump Maintenance: The pump is factory-filled with oil and is maintenance-free, requiring no additional oil. For pump issues, contact customer service.
- Connections: Hoses, gun, and spray wand connections should be regularly cleaned and lubricated with light oil or lithium grease to prevent leaks and O-ring damage.
- Nozzle Cleaning: If nozzles become clogged, leading to pulsating pressure or excessive pressure, they should be cleaned immediately using the provided nozzle cleaning tool and backflushing with clean water.
- Water Inlet Filter Cleaning: The screen filter in the water inlet of the pump should be periodically checked and cleaned by removing it, flushing both sides with water, and re-inserting it. The pressure washer should not be operated without this filter.
- Storage:
- Fuel-Related Problems: To prevent issues during storage, Ethanol Shield™ fuel stabilizer (sold separately) should be added to fresh gasoline, and the engine run for 10 minutes to circulate the treated fuel. The fuel valve should then be turned to OFF, and the engine run until it stops from lack of fuel in the carburetor.
- Pump Storage: For storage longer than 30 days or when freezing temperatures are expected, SIMPSON® / POWERWASHER® Pump Guard (or equivalent) is recommended to lubricate internal seals.
- Pressure Washer Storage: All water should be drained from the high-pressure hose, spray gun, and wand. The detergent siphon hose should be secured to protect it from damage. The unit should be stored in an upright position.