Maruyama MSW1012 Owner's manual

OWNER’S / OPERATOR’S MANUAL
MANUAL DEL PROPIETARIO U OPERADOR
MANUEL DE PROPRIÉTAIRE / OPÉRATEUR
BENUTZERHANDBUCH / BEDIENUNGSANLEITUNG
EIGENAAR / HANDLEIDING
MANUALE DEL PROPRIETARIO / OPERATORE
MSW1012(CE)/1017(CE)/1515(CE)
Pressure Washer
Lavadora de Alta Presión
Laveuse à pression
Hochdruckreiniger
Hogedrukreiniger
Rondella di pressione
Original instructions
Thank you very much for purchasing this product.
Read this Operator’s Manual carefully to ensure correct use of this product.
Be sure to read “Important Safety Instruction”before using this product.
Save this Instruction manual for future reference.
Caution This machine has been shipped without oil in the
engine and pump. Be sure to fill engine oil before starting it for
the first time.

Muchas gracias por haber adquirido este producto.
Lea este manual del operador cuidadosamente para asegurar el uso correcto de
este producto.
Asegúrese de leer "Instrucciones de seguridad importantes" antes de usar este producto.
Guarde este manual para futuras consultas.
Merci beaucoup pour l'achat de ce produit.
Lisez attentivement ce manuel de l'opérateur pour assurer une utilisation correcte de ce
produit.
Assurez-vous de lire "Consignes de sécurité importantes" avant d'utiliser ce produit.
Conservez ce manuel d'instructions pour référence future.
Vielen Dank für den Kauf dieses Produkts.
Lesen Sie diese Bedienungsanleitung sorgfältig durch, um richtige Verwendung dieses
Produkts zu gewährleisten.
Achten Sie darauf, "Wichtige Sicherheitshinweise", bevor Sie dieses Produkt gelesen werden.
Speichern Sie diese Bedienungsanleitung zum späteren Nachschlagen auf.
Heel erg bedankt voor de aankoop van dit product.
Lees deze gebruiksaanwijzing zorgvuldig door om correct gebruik van dit product te
garanderen.
Zorg ervoor dat u de "Belangrijke veiligheidsinstructies" voor gebruik van dit product.
Bewaar deze gebruiksaanwijzing voor toekomstig gebruik.
La ringrazio molto per aver acquistato questo prodotto.
Leggere attentamente il presente manuale per garantire un uso corretto di questo prodotto.
Assicurarsi di leggere "Informazioni importanti sulla sicurezza" prima di utilizzare questo prodotto.
Conservare il manuale di istruzioni per riferimento futuro.
Advertencia El motor y la bomba se envían sin aceite. Asegúrese de llenar de
aceite del motor antes de arrancarlo por primera vez.
Attention Cet appareil a été expédié sans huile dans le moteur et la pompe. Être sûr
de remplir l'huile de moteur avant de démarrer pour la première fois.
Achtung Dieses Gerät wurde ohne Öl im Motor und Pumpe ausgeliefert. Achten Sie
darauf, Motoröl, bevor Sie es zum ersten Mal zu füllen.
Let op Dit apparaat is geleverd zonder olie in de motor en de pomp. Zorg ervoor dat
de motor olie te vullen voordat u het voor de eerste keer.
Attenzione Questo apparecchio è stato spedito senza olio nel motore e la pompa.
Assicurati di riempire l'olio motore prima di avviare per la prima volta.

-1-EN
Introduction
Thank you very much for purchasing a Maruyama product. This Operator’s Manual explains the
correct handling of the product and how you can easily inspect and maintenance, so that you can
carry out your work safely and comfortably using this product.
Do not operate this product until you read this instruction manual and the engine instruction manual for
operation, inspection and maintenance instructions.
Save this manual for constant reference over the long life of this product. Please note that this product and
this manual are subject to change for the purpose of product improvements and consequent revisions
required.
If you have any questions or comments on this product, please contact your Maruyama dealer near you.
Save the Operator’s Manual for future reference.
If the Operator’s Manual is lost, purchase a new copy from your Maruyama dealer.
Never modify this product because doing so not only affects work safety and comfort, but it may
also create very dangerous situations.
Precautions
The following signal words and meanings are intended to explain the levels of risk associated with this
product.
Danger --- If not avoided, will result in death or serious injury.
Warning --- If not avoided, could result in death or serious injury.
Caution --- If not avoided, may result in minor or moderate injury.
Caution --- If not avoided, may result in property damage.
Hazard Symbols and Meanings
A –Risk of Explosion F –Risk of Injections
B –Risk of Electrical Shock G –Read the Operator’s Manual
C –Toxic Fumes H –Kickback
D –Risk of Chemical Burn
E –Eye Protection
I –Machine not suitable for connection
to the potable water mains
Ⓖ
Ⓓ
Ⓒ
Ⓑ
Ⓗ
Ⓕ
Ⓔ
Ⓐ
Ⓘ

-2-EN
Warning
This machine is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge.
Do not allow children or untrained persons to operate the washer.
Do not use the washer if you are tired or under the influence of alcohol, drugs or intoxicating
medication.
Warning
Machine not suitable for
connection to the potable water
mains
Warning
Risk of fire or explosion. Shut
off engine before adding fuel.
Keep work area free of
combustible materials. Do not
spray flammable liquids.
Warning
Risk of Electrical Shock. Never
direct spray toward any
electrical device or electrical
outlet.
Warning
Risk of injections. Do not direct
discharge stream at persons or
animals. Keep clear of nozzle.
Warning
Eye Protection. Spray can
propel objects. Always wear
Safety Glasses.
Warning
Risk of chemical burn. Never
spray acids, corrosive or toxic
chemicals.
Warning
Risk to breathing. Engine
exhaust fumes can kill. For
outdoor use only.
Work in a well-ventilated area.
Warning
Kickback. Firmly grasp spray
gun with both hands when
using high pressure spray to
avoid injury when spray gun
kicks back.
Warning
Read the Operator’s manual.
Understand all warnings and
instructions before operating
this equipment.

-3-EN
Table of Contents
1. Important Safety Instructions ..................................................4
2. Name and Function of Each Part...................................................8
3. Handling of Warning Labels..................................................11
4. Preparations before Startup.........................................................12
5. Startup Inspection.........................................................................16
6. Feeding (Self-priming) Water .......................................................17
7. Starting..........................................................................................18
8. Operation.......................................................................................20
9. How to Use the Spray Nozzle.......................................................21
10. Stopping ........................................................................................22
11. After Work......................................................................................22
12. Maintenance and Inspection ........................................................23
13. Long-term Storage........................................................................24
14. Troubleshooting............................................................................25
15. Specifications................................................................................26
16. Customer Service..........................................................................26

-4-EN
Cap
Protective goggles
Protective mask
Earplugs
(when performing noisy work)
Protective clothes
(no looseness around
the wrist)
Protective gloves
Work shoes
(boots)
1. Important Safety Instruction
(1) Overview
Be sure to read all instructions carefully before using the product, so you will operate the unit correctly and
safely.
Precautions that should be heeded to ensure work safety are listed below. Other important precautions are
mentioned throughout the main text, accompanied by Danger, Warning, Caution and
Caution symbols as deemed appropriate.
(2) Items to check before operation
Wear clothes and personal gear appropriate for work and fitting your body.
Inspect and maintain your protective gear regularly to make sure they function properly, and use the
protective gear correctly.
If you must work in a noisy environment, wear an ear muffler or earplugs.
Keep people away from the work area, except for operators.

Are you dressed properly for work?
Unexpected injuries
(such as loss of sight)
may occur during
high-pressure
cleaning due to mud
and sand particles
splashing back at you
at high speed. Wear
protective goggles
while working.

-5-EN
Fire hazard!
Gasoline
Prohibited
(3) Precautions for use
Purposes of use
Do not transport the machine with fuel in the fuel tank or with fuel valve open.
During transport, it must be fixed so that the machine will not tip over.
1) Removing dirt and mold from decks, cement patios, and house siding.
2) Cleaning cars, boats, motorcycles, outdoor furniture, and grills.
Fuel
Warning
Keep fire away from the machine during refueling or under maintenance.
Gasoline is extremely flammable and its vapors can explode if ignited.
Be sure to stop the engine and wait for it to
cool down prior to refueling. If fuel is spilt, wipe
it away carefully and wait until the fuel has
dried before starting the engine. Otherwise,
spilled fuel may ignite and cause fire.
Keep the machine at least 3 m away from the fuel
supply container before starting engine.
To reduce the risk of fire and burn injury, handle fuel
with care. It is highly flammable.
Do not smoke while handling fuel.
Engine
Warning
Do not operate the machine indoors. Carbon monoxide poisoning may occur.
Do not breathe the exhaust gas from the engine.
Empty fuel tank and secure the machine before
transporting in a vehicle. Failure to do so may result in
fire.
Never operate the machine indoors or in a poorly
ventilated area, such as tunnels, wells, tanks, cave, etc.
Never inhale the exhaust gas from the engine.
Exercise extreme care when operating the engine
near people or animals. It may cause carbon
monoxide poisoning.
Carbon monoxide, a colorless, odorless, and
extremely dangerous gas, can cause
unconsciousness or death.
Keep away from hot parts. The engine becomes very
hot while running or just after it has stopped. Touching
the muffler, cylinder fins, etc., may cause burns.
Do not touch the spark plug and ignition cable when starting and operating the engine.
Keep the engine away from flammables and other hazardous materials (trash, rags, lubricants,
explosives). It may cause fire.
Machinery
Preparation and precautions before work
Read the Instruction Manual carefully and familiarize yourself with the operations of the machine.
When unpacking, the machine has no oil in the engine and pump. Be sure to fill engine oil before using
the machine for the first time.
Shut off the engine before inspections, preparations, or maintenance. Failure to do so may result in
injuries.
Keep people other than operators, and animals, away from the work area. Failure to do so may result
in accidents.
ONLY use clean water. Use of muddy water, etc., may cause breakdown.
Do not put objects on the machine. The machine may be damaged or break down, or accidents may
occur.
Use the machine at ambient temperatures (20 15C).
ONLY use cold water.
Before using the high-pressure hose, make sure the hose is straight. If not, damage to the hose may
occur.
Do not use this machine for pumping drinking water, etc.
For outdoor use only.
Be cautious for ventilation
and flammables.
Prohibited

-6-EN
Do not touch with bare hands any of the male threads connecting the water suction hose, high-pressure
hose, spray wand and spray gun. Doing so may result in injuries. Wear protective gloves when
connecting these components.
Do not attempt to modify this product or create accessories not recommended for use with this product.
Any such alteration or modification is misuse and could result in a hazardous condition leading to
possible serious personal injury.
Do not use acids, alkalis, solvents, flammable material, bleaches, or industrial grade solutions in this
product. These fluids can cause chemical injuries to the operator and serious damage to the machine.
Precautions on moving
Do not move the machine while in operation. Stop the engine and wait for it to cool sufficiently before
moving the machine. Failure to do so may result in fire or burns.
This machine is heavy. To avoid back injury, lift the machine with your legs, not your back, and get help
when needed.
Do not tilt the machine more than necessary or take your hands off the machine while moving. The
machine may tip over and cause injuries.
When moving the machine with vehicle, drain fuel and secure the machine on the vehicle. Failure to do
so may cause of accidents caused by rollover or moving the machine.
Precautions on installation
Do not block the muffler side of the engine, when installing the machine. Failure to do so may result in
fire due to the heat of the exhaust gas, and can cause carbon monoxide poisoning by exhaust gas.
Exhaust port of the muffler must be directed to a well-ventilated open area.
Keep the machine free of grass, leaves, twigs, cloth rags, or grease to avoid a fire hazard.
Must be installed to be able to manipulate the machine easily. It may cause a delay in an emergency
response.
Install the machine on a horizontal, flat surface in a place not subject to water and droplets during work,
by keeping a sufficient distance away from the object to be cleaned. If the machine is used while tilted,
fuel spillage may result and the machine may move or tip over due to vibration. To avoid a hazardous
environment, do not install the machine into any muddy location or near objects that may fall.
Precautions pre-operation
Be sure to inspect the machine before operation to prevent potential dangers and problems during
work.
Check the high-pressure hose before connecting it and confirm that it is not damaged.
Check if the high-pressure hose and spray gun and spray wand are connected properly. Loose
connection may cause pressure to leak or the spray wand to come off and fly off, resulting in injuries.
Check bolts and nuts for looseness before each use. A loose bolt or nut may cause serious machine
problems.
Check for fuel and oil leaks. It may cause fire.
Precautions on cleaning operation
Keep children and visitors away from work area. All the assistants should wear safety goggles and be
kept a safe distance from work area.
Do not overreach or stand on unstable support. Keep proper footing and balance at all times.
Choose a working location as flat as possible and clear away unnecessary objects nearby. Exercise
caution to avoid slipping or falling.
If necessary, cover around the cleaning target with sheets to
protect the building, etc., from water droplets.
Precautions during operation
High-pressure water jets can be dangerous if subject to misuse.
The water jet stream must not be directed at persons, animals,
electrical devices or the machine itself. Water pressure in the
system will not be released even if the engine is stopped. Be
sure to pull the trigger to release the water pressure in order to
avoid accidents due to sudden water jet.
Do not put your hands or feet, the body into the high-pressure
water jet stream. It may cause serious injuries.
Do not operate the equipment while barefoot or when wearing
sandals or similar lightweight footwear. It may cause serious
injury.
Never direct a water jet stream
toward people or animals, or
any electrical device.

-7-EN
Never tie up the trigger of the spray gun with a string, wire, etc.
Make sure the water jet will stop in the moment the hand is
released. Tying up the trigger is extremely dangerous
because the water jet does not stop when the spray gun is
dropped.
Failure to do may result in serious injury.
For greater control and safety, grasp the spray gun with both
hands at all times. Pull back and hold the trigger to operate
the machine. Release the trigger to stop the flow through the
spray nozzle.
Make sure the lock out is engaged before starting the engine.
Otherwise, extremely dangerous high-pressure water jet may
occur suddenly.
Make sure that the lock out is engaged when you release your
hand from the spray gun while working.
How to engage the lock out;
Pull up on the lock out until it clicks into the slot.
How to disengage the lock out;
Push the lock out down and into its original position.
When leaving the machine unattended, be sure to stop the
engine and pull the trigger to release the water pressure from
system to prevent a sudden injection of high-pressure water.
Make sure that the high-pressure hose is straightened during
operation. If the hose is pulled forcibly, it may be bent and
damaged. To prevent damage to the hose, straighten it before
use. Also check occasionally during work that the hose is not
bent.
Do not move the machine by pulling the high-pressure hose.
Damage the hose, water leakage occurs and the machine
may tip over. It may cause injury or fire.
Do not too close the spray nozzle to the cleaning surface
when the working.And do not stop the spray nozzle in the
same place. High-pressure water may damage the cleaning
surface.
When cleaning painted surfaces or mortar finished surface, be
sure to do the cleaning test. If not, it may damage the cleaning
surface.
Keep the machine dry (do not use in the rain, do not splash
water to the unit). It may cause breakdown.
Never direct a water jet stream towards people or animals or
place any body part in the stream. Leaking hoses and fittings
may also cause injection injury. Do not hold hoses or fittings.
Do not inhale the mist generated during cleaning, it may be
harmful. Wear a protective mask if necessary.
(4) Precautions after use
Inspect and maintain the protective gears so that they function properly at all times.
Thoroughly remove water droplets, mud, dirt, etc., from the machine. If they remain attached, rust or
breakdown may occur.
Wait for each part has sufficiently time to cool before performing any maintenance and inspection. Failure
to do so may cause burns.
Never store the machine with fuel in the fuel tank inside a building where ignition sources are present,
such as water heaters and stoves, clothes dryers, and the like. Be sure to store the machine in a dry and
covered, no fire sources location. Place the machine in location that is not affected by the weather, such as
hanger or barn.
It is important to store this machine in a frost-free area.Always empty water from all hoses, the pump, and
the spray gun before storing. If water remains, it may freeze and cause damage. Be careful in winter
season.
Do not bend the high-pressure hose!
Never tie up the trigger!
Lock out the trigger
when starting the engine!

-8-EN
2. Name and Function of Each Part
Checking the standard accessories
Inspect the product carefully to make sure no breakage or damage occurred during shipping. Do not discard
the packing material until you have carefully inspected and satisfactorily operated the product. If any parts are
damaged or missing, immediately contact your Maruyama dealer.
[1] Engine/Pump assembly
[6] High-pressure hose
φ6.4 x 8m
P/N132238
[7] Spray wand (with nozzle)
P/N131973 for MSW1012(CE)
P/N132665 for MSW1017(CE)
P/N132678 for MSW1515(CE)
P/N131973 for Spitfire 2000
[8] Spray gun
P/N131972
[10] Operator’s manual
(Engine)
[9] Operator’s Manual
(Machine)
[11] Plug wrench
[2] Handle assembly
[3] Water Suction Hose
φ13 x 2.4m
P/N131215
[5] Suction Strainer
P/N 131303
[4] Hose Band
P/N131306

-9-EN
Assembly Instructions
Caution
Do not over-inflate the tires of this unit. During inflation regularly check the pressure using a
reliable tire pressure gauge, and never exceed 30 psi.
Handle Assembly
Install Handle to the base, depress the buttons, and slide the handle assembly onto the base until locked.
Caution
Do not place hands between handle and base when assembling to prevent pinching.
Name of each part
[2] Oil filler port
[1] Pump
[5] Water
suction port
[11] Handle
[9] Frame
[4] Oil gauge
[3] Oil drain
[6] Discharge port
[7] Unloader
[8] Water drain/
air bleeder knob
[12] Speed control lever
[10] Engine
[13] Stop switch
[14] Choke lever
[15] Fuel valve
[16]Recoil starter
handle
[17] Thermal relief valve
[18] Oil sensor

-10-EN
Function of each part
[1] Pump
Suction water from the water suction hose, pressurize water, and feed pressurized water to the
high-pressure hose and spray gun.
[2] Oil filler port
Pump lubrication oil is filled from this port.
[3] Oil drain
Pump lubrication oil is drained from here.
[4] Oil gauge
The level of pump lubrication oil is checked here.
[5] Water suction port
Water is suctioned from here. Connect the water suction hose.
Caution
Do not touch the male thread at the connection part with bare hands. It may cause injuries. Wear
protective gloves when connecting the thread.
[6] Discharge port
Pressurized water is taken out from this port. Connect the high-pressure hose.
Caution
Do not touch the male thread at the connection part with bare hands. It may cause injuries. Wear
protective gloves when connecting the thread.
[7] Unloader valve
This device is used to adjust pressure. If the water jet has been stopped during the operation, the pump
pressure (load) is reduced. Even after reducing the pressure (load) of the pump, high-pressure water is
sealed in the high-pressure hose, and spray gun. The unloader valve also serves as a safety valve.
Caution
Do not adjust the pressure as it has been adjusted at the factory. It may cause breakdown.
Tightening the adjusting screw of the unloader beyond the adjustable range may disable its
function as a safety valve and create dangerous situations. Do not forcibly tighten to screw of the
unloader valve.
[8] Water drain/air bleeder knob
When starting the machine, use this knob to bleed air from the water suction hose and pump to facilitate
suctioning water. Keep the knob open when the machine is restarted after a period of suspending
operation, as it makes easier to start the engine.
Use the knob to drain water before storing the machine.
Caution
Be sure to close the knob once the engine has started. Failure to do so may cause the pressure
does not increase due to water leakage.
[9] Frame
Frame of the machine.
[10] Engine
The engine drives the pump. For details, read the engine instruction manual carefully.
[11] Handle
Hold this handle when moving the machine.
Caution
Wait for the engine to cool sufficiently before moving the machine. Failure to do so may result in fire
or burns.
Do not tilt the machine more than necessary or take your hands off the machine while moving.
The machine may tip over and cause injuries.
[12] Speed control lever
Adjust the engine speed (pump speed).
[13] Stop switch
Place the stop switch to the “OFF”(O) position stops the engine.
Turn the stop switch to the “ON”(I) position allows the engine to be started.
[14] Choke lever
Close this lever when starting the engine, as it makes it easier to start the engine, if the engine is cold or
the ambient temperature is low.

-11-EN
[15] Fuel valve
Fuel supply from the fuel tank can be stopped at this valve.
[16] Recoil starter handle
The engine can be started by pulling the recoil starter handle.
[17] Thermal relief valve
This pump feature will prevent water temperatures from reaching harmful levels by releasing a small
amount of water. Once the water has drained, the thermal relief valve will reset itself.
Caution
Do not stop the water jet from the spray gun for no longer than 3 minutes while the engine is
running. Water is circulating in the pump and temperature will rise, and breakdown may occur as a
result. If the water jet is stopped for 3 minutes or longer, be sure to stop the engine.
[18] Oil sensor
The engine will stop automatically when the oil level falls below the safety limit.
3. Handling of Warning Labels
Caution
Keep the labels free from soiling and mud at all times so that the content of the text is clearly
legible.
If warning label is damaged, it must be replaced with new one.
If you replaced the parts warning label attached, be sure to attach a new warning label in the same
location of the new parts.
The following warning labels are found on this machine. Read the labels carefully and understand the
instructions before commencing work.

-12-EN
4. Preparations before Startup
Caution
Preparation before startup must be performed while the engine is not in operation. If the engine is
running, accidents or injuries may result.
Checking/adding oil
Caution
Before checking or adding oil, be sure the machine is located on a flat, level surface. If not, oil may
be overfilled or shortage may occur. If oil amount is low, pump failure occurs.
This product has been shipped without oil in the engine and pump. Be sure to fill engine oil before
use.
Tighten the oil filler cap and the engine oil gauge. If they remain loose, oil may leak out.
Use engine oil SAE10W-30 of grade SE or higher.
Checking/adding oil to the pump
When using the machine for the first time, fill oil to
the red mark at the center of the oil gauge.
MSW1012(CE),1017(CE) ---Approx. 0.3 liter
MSW1515(CE) --- Approx. 0.4 liter
* Adding oil excessively may cause oil to spill out
from the oil filler cap during operation. Do not fill oil
excessively.
[1] Check if oil is filled to the red mark at the center of
the oil gauge.
[2] If the oil level is low, add new oil.
If the oil is dirty or significantly discolored, it should
be changed.
For the timing and method of oil change, refer to
p. 22.
[3] After oil filling, securely tighten the oil filler cap.
Checking/adding oil to the engine
When using the machine for the first time, fill oil to the engine.
MSW1012(CE),1017(CE) (Robin EX170, 210) --- Approx. 0.6 liter
MSW1515(CE) (Robin EX270) --- Approx. 1.0 liter
[1] Check if the oil level is above the lower limit.
[2] If the oil level is low, add up to the upper level with the new oil.
If the oil is dirty or significantly discolored, should be change.
For details, read the engine instruction manual carefully.
[3] After oil filling, securely tighten the oil gauge.
Caution
The engine has an oil sensor. The engine will stop automatically when the oil level falls below the
safety limit. Fill the crankcase with oil up to the proper level.
Checking oil Oil filling
oil
Oil filler cap
Center of oil gauge
Oil filler port
Oil gauge
(Do not screw in,
but simply insert.)
Upper level
Lower limit
(Must be refilled)

-13-EN
Refueling
Warning
Be sure to heed the following items to prevent fire.
Be sure to stop the engine before refueling.
Keep away the machine from ignition sources and the open flame when refueling.
Add fuel carefully without spilling. When the fuel is spilled, wipe off immediately.
After refueling, make sure that the fuel cap is secured to prevent spillage.
Use automotive unleaded gasoline only. DO NOT mix oil with gasoline.
Be sure to use the fuel filter screen when refueling to the fuel tank.
For details, read the engine instruction manual carefully.
Installation
Caution
Keep people other than the operator away from the machine. Be careful particularly children and
animals.
Keep the machine free of grease, gasoline, or flammables to avoid a fire hazard.
Do not use the machine in a poorly ventilated location. Do not block the space around the machine
on the side of the exhaust port of the muffler.
Do not place an object around the installed machine and always keep nearby area clear. Failure to
do so will cause a delay in the operation of the machine in the case of an emergency. It may cause
accidents.
Must be installed this machine on a flat, level surface in a place not subject to splash and water
droplet during work. Keep a sufficient distance between the machine and the cleaning target.
Do not drop or throw the machine during installation.
Installing the water suction hose
Caution
If the water suction hose is not connected completely or the hose is bent or crushed, air may be
sucked. In this case, water may not be suctioned, abnormal vibration may occur, or otherwise this
will damage the high-pressure seals and decrease the life of the pump.
Make sure that before installing the water suction hose, gasket in the mounting thread is not lost or
damaged. Then screw the mounting thread until the end to the water suction port firmly.
Caution
Do not touch the male thread at the connection part with bare hands. It may cause injuries. Wear
protective gloves when connecting the thread.
Mounting thread
Gasket
Mounting thread
Water suction port
Water suction hose

-14-EN
Feeding water directly from a water tap (faucet)
Caution
Do not bend the water suction hose or pull it in the lateral direction. It may result in the hose
damage or burst.
Insert the water suction hose to the faucet and secure the hose by tightening the hose band with a
screwdriver.
If the outer diameter of the faucet is too large to insert the water suction hose, a coupler is required.
Self-priming water
Tighten firmly the water suction strainer by hand to prevent the male hose thread loosening.
Insert the water suction hose all the way into the male hose thread and secure the hose with the hose
band.
Caution
Clean the water suction strainer after each use.
Prepare a water bucket, plastic container or other container that can be used as the water feed
container.
A container is recommended volume of 20 liters or more.
Put the container on the ground of the same height as the machine, feed water using a hose connected
to a water tap. And then sink the water suction strainer to the bottom of the container.
Suction of the water at the start, make sure that the water suction hose is less than the height of 15 cm
from the water level in the container.
Water suction hose
Hose band
Water suction strainer
Water suction strainer
Male hose thread
Water suction hose
Hose band
Water suction strainer
Water suction hose
Water feed container
Within 15 cm from
the water level
Water feed container

-15-EN
Assembling the spray gun
Warning
Securely connect the spray gun and spray
wand. If not, the spray wand may fly off,
cause accidents or injuries.
Straight into the spray wand to the
spray gun, tighten firmly by hand by
turning clockwise the swivel of the
spray gun.
If the spray wand is not plugged into
smoothly, apply a small amount of
water or diluted detergent to the inner
diameter part of the connection
thread.
Caution
Do not touch the male thread at the connection part with bare hands. It may cause injuries. Wear
protective gloves when connecting the thread.
Installing the high-pressure hose
Warning
Securely connect the high-pressure hose. If the hose is disconnected, accidents and injuries may
occur.
Caution
Do not touch the male thread at the connection part with bare hands. It may cause injuries. Wear
protective gloves when connecting the thread.
Remove the bending and twisting of the high-pressure hose.
Straight into the high-pressure hose to the pump discharge port and spray gun connection port, and
tighten firmly by hand by turning clockwise swivel of the high-pressure hose.
If the high-pressure hose is not plugged into smoothly, apply a small amount of water or diluted
detergent to the inner diameter part of the connection thread.
If the connected high-pressure hose is twisted, remove the twists by extending the hose straight while
turning the spray gun.
If the connected high-pressure hose is still twisted, loosen the swivel on the spray gun side and extend
the hose straight once again by turning the spray gun.
When the high-pressure hose is free from twists, re-tighten the swivel.
Spray gun
Swivel
Spray wand
Spray gun
Swivel
Swivel
Pump
discharge
port
High-pressure hose
High-pressure hose

-16-EN
5. Start-up Inspection
Caution
To prevent injuries and accidents, be sure to inspect and maintenance on a level surface under
sufficient lighting after stopping the engine.
If a particular inspection or maintenance work must be performed with the engine running, be sure
to contact your Maruyama dealer. Doing that yourself may result in injuries or accidents.
To prevent breakdown, it is important that you know the condition of the machine at all times. Before
commencing work, be sure to check the following items.
Category
Item
What to inspect
Action
Common to all
categories
Screws/bolts
Any loose or detached screws?
Inspect and tighten as necessary.
Not deformed or damaged?
Request repair.
Dirt or dust not attached?
Clean.
Pump
Lubrication oil
Oil filled to the red mark at the
center of the gauge?
Add oil to the red mark.
Oil not dirty?
Change.
Oil not leaking?
Request repair.
Water suction strainer
Cleaned after each use?
Clean.
Water suction hose
High-pressure hose
Hose not damaged?
Change.
Gasket (O-ring) not lost/damaged?
Add/change.
Thread not damaged?
Change.
Foreign matters not attached to the
connection part?
Clean.
Spray gun (nozzle)
Not clogged?
Clean.
Quick connect coupling set
Not damaged/leaking water?
Change.
Foreign matters not attached to the
connection part?
Clean.
Hose band
Not loose?
Inspect and tighten as necessary.
Engine
Lubrication oil
Oil filled to the specified amount?
Add to the specified level.
Oil not dirty?
Change.
Oil not leaking?
Request repair.
Fuel
Fuel not leaking?
Request repair.
Fuel in the fuel tank?
Charge fuel.
Air cleaner
Element not dirty?
Clean.
General
Abnormal noise
Any abnormal noise?
Stop the operation and investigate
the cause.
Abnormal
vibration
Any abnormal vibration?
Stop the operation and investigate
the cause.
Water leak
Water not leaking?
Stop the operation and investigate
the cause.

-17-EN
6. Feeding (Self-priming) Water
Feeding water directly from a water tap (faucet)
Caution
When working is stopped temporarily, close the water tap.
When working is over, close the water tap and remove the water suction hose. Be careful to prevent
mud and dust coming into the suction hose.
Caution
Use tap water (drinking water). Use of unfiltered well water may cause sand and other foreign
matter to enter the pump, resulting in breakdown.
Supply capacity of the water tap must have at least 20 liters of water per minute. If the capacity is
low, vibration or abnormal noise may occur and pressure may not rise. If the supply capacity of the
water tap is low, prepare a larger water feed container for self-priming.
Close the water tap when starting the engine. Otherwise, even if the water drain/air bleeder knob is
opened, it is difficult to start the engine. (Once the engine has started, open the water tap
immediately.)
Do not bend the water suction hose or pull it in the lateral direction. It may result in hose damage or
cause it to burst.
Before operation, open the water tap and then pull the trigger to confirm there is no water leakage from the
connection part of hoses, pump, spray gun, etc. (* Keep the water drain/air bleeder knob closed.)
Close the water tap.
If water is leaking, check for looseness or abnormality of the gasket and O-ring. Be sure to correct it if
necessary, and then check again.
If there is no problem, you are ready to feed water.
Self-priming water
Caution
Do not use this machine for pumping drinking water.
Caution
Use water of 5 to 40C. Use of hot water may cause breakdown.
If the outside air temperature is low and pump is feared frozen, warm up the pump with warm water,
etc. before use. If the machine is used while the pump is frozen, the pump may be damaged.
Use clean water (drinking water). Do not use water containing sand or scale particles. Also note that
agro-chemicals, chemical agents, highly viscous liquids, sea water, hot spring water or any
contaminated water containing the foregoing cannot be used. Use of such water may cause
breakdown.
Clean the water suction strainer after each use to prevent clogging.
Make sure the water suction strainer is completely sunk in water. If not, breakdown may occur or
water may not be suctioned.
The suction head which is the height between the water suction strainer and the pump suction port
must be less than 0.2 m. If not, breakdown may occur or water may not be suctioned.
Be careful not to squash the water suction hose at the edges of the water feed container.
Breakdown may occur or water may not be suctioned.
Remove dirt and sediments from the water feed container.
Add necessary amount of clean water (drinking water) to the container. The container of at least 20 liters or
more is recommended. If the container is too small, water will quickly run out and working is interrupted.
* If the supply capacity of the water tap is low, a larger feed container is required.
Sink the water suction hose strainer on the bottom of the container.
During working, feed clean water (drinking water) to the container as necessary.

-18-EN
7. Starting
Caution
Keep away from hot parts. The muffler cover and other engine parts become very hot during
operation. It may cause serious burns.
Spray gun
Caution
Engage the lock out before starting engine.
Water drain/air bleeder knob
Turn the water drain/air bleeder knob
counterclockwise until it opens by around half a turn
from the fully closed position.
* Do not turn the knob by more than half a turn to avoid
the knob coming off.
* When feeding water directly from the water tap
(faucet), close the water tap. If the water tap is open,
the engine cannot be started smoothly.
Engine
For details, read the engine instruction manual carefully.
1. Open the fuel valve.
2. Turn the stop switch to the “ON”(I) side.
3. Set the speed control lever from the “Low speed”(L) position toward the “High speed”(H) position by
approx. one-third of the way.
4. Close the choke lever.
Adjust the choke lever angle as follows:
“Fully close”the lever when the ambient temperature is low or the engine is cold.
“Fully open" or “half open”the lever when the ambient temperature is high or the engine is warm.
5. With the handle or top of the frame securely held, gradually pull the recoil starter handle until resistance
is felt at some point (compression point). Return the handle to its original point and pull swiftly. If the
starter handle has been pulled out excessively, return the handle and pull it again.
Caution
Do not pull out all the recoil starter rope. Doing so may cause breakdown.
Do not release your hand pulling the starter handle. Doing so may damage the recoil starter.
Do not touch the starting handle while the machine is operating. Doing so may cause breakdown.
6. After starting the engine, gradually open choke by turning the choke and finally keep it fully opened.
* Do not fully open the choke lever immediately when the engine is cold or the ambient temperature is low,
because the engine may stall out.
Caution
Do not put your hand over the muffler when starting the engine. It may cause burns.
If the engine does not start after pulling the starting handle a few times, too much fuel may be suctioned and
the engine may become harder to start. “Fully open”the choke lever before the next attempt.
Be sure to check that the lock out is engaged
before starting. Water may suddenly jet out
from the nozzle and cause accidents.
Open
Air bleeder knob
Lock out
Trigger