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Simpson MS31025HT-S - User Manual

Simpson MS31025HT-S
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Part No. 7104573 Rev. 5 JUN2016
3100 PSI
2.5 GPM
PREMIUM PRESSURE WASHER
INSTRUCTION
MANUAL
MANUAL DE
INSTRUCCIONES
MODEL
MODELO
MSH3125-S
MS31025HT-S
If your pressure washer is not working properly or if there are parts missing or broken,
please DO NOT RETURN IT TO THE PLACE OF PURCHASE. Contact our customer
service department at 1-877-362-4271 or www.simpsoncleaning.com
Si su lavadora a presión no trabaja correctamente ó encuentra partes rotas
ófaltantes, por favor NO LA REGRECE AL LUGAR DONDE LA COMPRO.
Contáctese con nuestro Departamento de Servicio al Cliente llamando al
1-877-362-4271 ou www.simpsoncleaning.com
IMPORTANT: Please make certain that the person who is to use this equipment carefully
reads and understands these instructions before operating.
IMPORTANTE: Aségurese por favor de que la persona que vaya a utilizar este equipo lea
con cuidado y comprenda estas instrucciones antes de operar.
VEA EL ESPAÑOL EN LA CONTRAPORTADA. INSTRUCTIVO DE OPERACIÓN,
CENTROS DE SERVICIO Y PÓLIZA DE GARANTÍA. ADVERTENCIA:
LÉASE ESTE INSTRUCTIVO ANTES DE USAR EL PRODUCTO.
SAVE THIS MANUAL FOR FUTURE REFERENCE
CONSERVE ESTAS INSTRUCCIONES PARA FUTURAS CONSULTAS

Table of Contents

Questions and Answers

  • I
    ismithAug 10, 2025
    Why won't my Simpson Pressure Washer engine start?
    • Y
      yramirezAug 10, 2025
      Your Simpson Pressure Washer engine might not start due to several reasons. It could be because there's no fuel, so add fresh fuel. Check if pressure builds up after a couple of pulls; if so, squeeze the gun trigger to relieve pressure. Ensure the choke lever is in the 'Choke' position when starting a cold engine, or in the 'No Choke' position if the engine is hot or has been exposed to heat. Also, make sure the spark plug wire is attached and the engine switch is in the ON position.
  • K
    Kimberly AndrewsAug 17, 2025
    What to do if my Simpson MS31025HT-S has no or low pressure?
    • M
      Mr. Richard Ware Jr.Aug 17, 2025
      If your Simpson Pressure Washer has no or low pressure, several factors could be the cause. First, ensure the spray wand is set to high pressure. Make sure your water supply provides at least 5 gpm at 20 PSI. Check for leaks at the high-pressure hose fitting and repair them, applying sealant tape if needed. Clear any obstructions from the nozzle. Clean the water filter screen. Remove any air from the hose by disconnecting the water source, turning it on to flush air, and then reconnecting it, finally, ensure the choke is in the 'No Choke' position and that the high-pressure hose is under 100 feet.
  • X
    xbowmanAug 25, 2025
    What to do if my Simpson Pressure Washer won't draw chemicals?
    • S
      samanthaespinozaAug 25, 2025
      If your Simpson Pressure Washer isn't drawing chemicals, make sure the spray wand is in the low-pressure setting. Check and clean the chemical filter if it's clogged. Ensure the chemical screen is fully submerged in the cleaning solution. If the chemical is too thick, dilute it to the consistency of water. Use a longer water supply hose instead of a long high-pressure hose.
  • P
    Paul WhiteSep 2, 2025
    What to do if my Simpson Pressure Washer is leaking water at the gun or spray wand connection?
    • D
      David MorganSep 2, 2025
      If your Simpson Pressure Washer is leaking water at the gun/spray wand connection, inspect the o-ring for wear or tears and replace if necessary. Also, check the hose connection and tighten if it's loose.

Summary

Safety Guidelines and Definitions

Safety Definitions

Important Safety Instructions

Provides critical safety advice on carbon monoxide, injection risks, and California's Proposition 65 warning.

Risk of Explosion or Fire

Risk to Breathing (Asphyxiation)

Risk of Fluid Injection and Laceration

What Can Happen

Describes how high-pressure spray can penetrate skin, causing serious injury or amputation.

How to Prevent It

Instructs to inspect hoses, avoid direct spray, and never treat fluid injection as a minor cut.

Risk of Unsafe Operation

What Can Happen

Highlights risks of operating while fatigued, under influence, or improper starting procedures.

How to Prevent It

Advises staying alert, gripping wand firmly, and keeping children away.

Quick Setup Guide

Install the Handle

Add;Check Oil

Instructions for adding engine oil, as the unit is shipped without it.

Add Gasoline

Guidance on adding fresh, unleaded gasoline with the correct octane rating.

Quick Start Guide

Engine Safety Warnings

Highlights dangers of running the engine indoors and risks of fluid injection.

Pump Overheating Warning

Warns against running the unit for over two minutes without trigger pull to prevent pump damage.

Assembly Instructions

Step-by-Step Assembly

Operation

Detergent Injection System

How to Use Spray Wand

Changing Nozzles

Provides instructions and safety warnings for changing spray nozzles on the wand.

Nozzle Chart

Details nozzle colors, spray patterns, uses, and compatible surfaces for effective cleaning.

Starting the Pressure Washer

Starting Procedure Warnings

Reiterates safety warnings for fluid injection and carbon monoxide before starting.

Maintenance

General Maintenance Warnings

Trouble Shooting Guide

Engine Will Not Start

Addresses issues like no fuel, spark plug wire, or engine switch in OFF position.

No or Low Pressure (Initial Use)

Covers causes like low water supply, obstructed nozzles, or clogged filters.

Will Not Draw Chemicals

Water Leaking at Pump

Simpson MS31025HT-S Specifications

General IconGeneral
ModelMS31025HT-S
TypeGas Pressure Washer
Pressure3100 PSI
Flow Rate2.5 GPM
EngineHonda GC190
Hose Length25 ft
Nozzle Types0°, 15°, 25°, 40°, Soap
Pump TypeAxial Cam
PumpOEM Technologies Axial Cam

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