MULTIQUIP QP-204H User manual

OPERATION AND PARTS MANUAL
Revision #3 (06/05/06)
MULTIQUIP
MODEL QP-204H
CENTRIFUGAL PUMP
(Honda Gasoline Engine)
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
To find the latest revision of this
publication, visit our website at:
www.multiquip.com

PAGE 2 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 3
NOTE PAGE

PAGE 4 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
TABLE OF CONTENTS
QP-204H Gasoline
Powered Centrifugal
Pump
Proposition 65 Warning ............................................. 2
Table of Contents ...................................................... 4
Parts Ordering Procedures ....................................... 5
Safety Message Alert Symbols .............................. 6-7
Rules For Safe Operation ...................................... 8-9
Pump Specifications/Dimensions .............................10
Engine Specifications ...............................................11
General Information .................................................12
Pump Components ..................................................13
Refueling ..................................................................14
Basic Engine ............................................................15
Pre-Inspection (Engine) ...........................................16
Pre-Set-up (Pump) ...................................................17
Initial Start-up (Engine) ...................................... 18-19
Maintenance (Pump) ......................................... 20-21
Maintenance (Engine) ........................................ 22-23
Preparation for Long-Term Storage .........................24
Troubleshooting (Engine) .........................................25
Troubleshooting (Engine/Pump) .............................. 26
Explanation Of Code In Remarks Column ...............28
Suggested Spare Parts ............................................29
Component Drawing
Pump Assy. ........................................................ 28-29
Specification and part number
are subject to change without
notice.
NOTE
Honda GX120K1PX2/
GX120U1PX2 Engines
Air Cleaner (Dual) Assembly .............................. 32-33
Camshaft Assembly ........................................... 34-35
Carburetor Assembly ......................................... 36-37
Control Assembly ............................................... 38-39
Crankcase Cover Assembly ............................... 40-41
Crankshaft Assembly ......................................... 42-43
Cylinder Barrel Assembly ................................... 44-45
Cylinder Head Assembly .................................... 46-47
Fan Cover Assembly .......................................... 48-49
Flywheel Assembly ............................................ 50-51
Fuel Tank Assembly ........................................... 52-53
Ignition Coil Assembly ........................................ 54-55
Muffler Assembly ............................................... 56-57
Piston Assembly ................................................. 58-59
Recoil Starter Assembly..................................... 60-61
Gasket Kit Assembly .......................................... 62-63
Labels ................................................................ 64-65
Terms and Condition Of Sale —Parts .................... 66

PAGE 6 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
QP-204H — SAFETY MESSAGE ALERT SYMBOLS
Refer to the engine manufacturer’s instructions for data
relative to its safe operation.
Before using this centrifugal pump, ensure that the
operating individual has read and understands all
instructions in this manual.
HAZARD SYMBOLS
Safety precautions should be followed
at all times when operating this
equipment. Failure to read and
understand the Safety Messages and
Operating Instructions could result in
injury to yourself and others.
FOR YOUR SAFETY AND THE SAFETY OF OTHERS!
SAFETY MESSAGE ALERT SYMBOLS
The three (3) Safety Messages shown below will inform you
about potential hazards that could injure you or others. The
Safety Messages specifically address the level of exposure
to the operator, and are preceded by one of three words:
DANGER, WARNING, or CAUTION.
Potential hazards associated with the operation of this
equipment will be referenced with Hazard Symbols which
appear throughout this manual, and will be referenced in
conjunction with Safety Message Alert Symbols.
Engine exhaust gases contain
poisonous carbon monoxide. This gas
is colorless and odorless, and can
cause death if inhaled. NEVER operate
this equipment in a confined area or
enclosed structure that does not provide
ample free flow air.
WARNING - Lethal Exhaust Gases
Gasoline is extremely flammable, and its
vapors can cause an explosion if ignited.
DO NOT start the engine near spilled fuel
or combustible fluids.
DO NOT fill the fuel tank while the engine is running or
hot. DO NOT overfill tank, since spilled fuel could ignite if
it comes into contact with hot engine parts or sparks from
the ignition system. Store fuel in approved containers, in
well-ventilated areas and away from sparks and flames.
WARNING - Explosive Fuel
Engine components can generate extreme
heat. To prevent burns, DO NOT touch
these areas while the engine is running or
immediately after operations. Never
operate the engine with heat shields or heat
guards removed.
WARNING - Burn Hazards
ALWAYS wear approved respiratory
protection when required.
CAUTION - Respiratory Hazard
You WILL be KILLED or SERIOUSLY INJURED
if you DO NOT follow these directions.
DANGERDANGER
DANGERDANGER
DANGER
You CAN be KILLED or SERIOUSLY INJURED if
you DO NOT follow these directions.
WARNINGWARNING
WARNINGWARNING
WARNING
You CAN be INJURED if you DO NOT follow
these directions.
CAUTICAUTI
CAUTICAUTI
CAUTION
NOTE
This Owner’s Manual has been
developed to provide complete
instructions for the safe and
efficient operation of the
Multiquip QP-204H Centrifugal
Pump .

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 7
This pump, other property, or the
surrounding environment could
be damaged if you do not follow
instructions.
NOTE
Other important messages are provided throughout this
manual to help prevent damage to your pump, other
property, or the surrounding environment.
ALWAYS place the engine ON/OFF
switch in the OFF position, when the
pump is not in use.
ALWAYS wear approved eye and
hearing protection.
NEVER operate equipment with covers,
or guards removed. Keep fingers, hands,
hair and clothing away from all moving
parts to prevent injury.
CAUTION - Rotating Parts
CAUTION - Accidental Starting
CAUTION - Sight and Hearing Hazards
CAUTION - Equipment Damage Messages
QP-204H — SAFETY MESSAGE ALERT SYMBOLS

PAGE 8 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
■ ALWAYS refuel in a well-ventilated area, away from sparks
and open flames.
■ ALWAYS use extreme caution when working with flammable
liquids. When refueling, stop the engine and allow it to cool.
DO NOT smoke around or near the machine. Fire or explosion
could result from fuel vapors, or if fuel is spilled on a hot
engine.
■ NEVER operate the equipment in an explosive atmosphere
or near combustible materials. An
explosion or fire could result causing
severe
bodily harm or even death.
■ Topping-off to filler port is dangerous, as it
tends to spill fuel.
■ Refer to the Engine Owner's Manual for engine technical
questions or information.
■ NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage to
the equipment and/or injury to user may result.
■ Manufacturer does not assume responsibility for any accident
due to equipment modifications.
■ NEVER run engine without air cleaner. Severe engine damage
may occur.
■ ALWAYS read, understand, and follow procedures in
Operator’s Manual before attempting to operate equipment.
■ NEVER touch the hot exhaust manifold,
muffler or cylinder. Allow these parts to
cool before servicing engine or plate
compactor.
■ HighTemperatures – Allow the engine to cool before adding
fuel or performing service and maintenance functions. Contact
with
hot components can cause serious burns.
The following safety guidelines should always be used when
operating the
pump :
GENERAL SAFETY
■ DO NOT operate or service this equipment before
reading this entire manual.
■ This equipment should not be operated by persons under 18
years of age.
■ NEVER operate this equipment without proper protective
clothing, shatterproof glasses, steel-toed boots and other
protective devices required by the job.
■ NEVER operate this equipment when not feeling
well due to fatigue, illness or taking medicine.
■ NEVER operate this equipment under the influence or drugs or
alcohol.
■ Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
■ ALWAYS check the machine for loosened threads or bolts
before starting.
■ ALWAYS wear proper respiratory (mask) hearing and eye
protection equipment when operating the pump.
DANGERDANGER
DANGERDANGER
DANGER
Failure to follow instructions in this manual may lead to
serious injury or even death! This equipment is to be
operated by trained and qualified personnel only! This
equipment is for industrial use only.
QP-204H — RULES FOR SAFE OPERATION
■ The engine of this pump requires an adequate free flow of
cooling air.
NEVER! operate the pump in any enclosed or
narrow area where free flow of the air is restricted. If the air
flow is restricted it will
cause serious damage to
the pump or engine and
may cause injury to
people and property.
Remember the engine
gives off DEADLY gases.

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 9
QP-204H — RULES FOR SAFE OPERATION
Maintenance Safety:
■ NEVER lubricate components or attempt service on a
running machine.
■ ALWAYS allow the machine a proper amount of time to
cool before servicing.
■ Keep the machinery in proper running condition.
■ Fix damage to the machine immediately and always replace
broken parts.
■ Dispose of hazardous waste properly. Examples of
potentially hazardous waste are used motor oil, fuel and
fuel filters.
■ DO NOT use food or plastic containers to dispose of
hazardous waste.
■ DO NOT pour waste, oil or fuel directly onto the ground,
down a drain or into any water source.
EMERGENCIES
■ ALWAYS know the location of the
nearest
fire extinguisher .
■ ALWAYS know the location of the nearest first aid kit .
■ In emergencies always know the location of the
nearest phone or
keep a phone on the job site .
Also know the phone numbers of the nearest
ambulance , doctor and fire department . This
information will be invaluable in case of an
emergency.
■ NEVER run engine without air cleaner. Severe engine damage
may occur.
■ ALWAYS read, understand, and follow procedures in
Operator’s Manual before attempting to operate equipment.
■ ALWAYS be sure the operator is familiar with proper safety
precautions and operation techniques before using pump.
■ ALWAYS store equipment properly when it is not being used.
Equipment should be stored in a clean, dry location out of the
reach of children.
■ NEVER leave the pump unattended, turn off engine when
unattended.
■ Unauthorized equipment modifications will void all
warranties.
■ NEVER pump volatile, explosive, flammable or low flash
point fluids.These fluids could ignite or explode.
■ NEVER operate the pump in an explosive atmosphere.
■ Before starting the pump, check that the clean-out cover is
securely fasten.
■ ALWAYS ensure pump is on level ground before use.
■ Become familiar with the components of the pump before
operating.
■ ALWAYS replace any worn or damaged warning decals.
■ NEVER pump corrosive chemicals or water containing toxic
substances. These fluids could create serious health and
environmental hazards. Contact local authorities for
assistance.
■ NEVER open the priming plug when
pump is hot. Hot water inside could be
pressurized much like the radiator of an
automobile. Allow pump to cool to the
touch before loosening plug. The
possibility exists of scalding, resulting
in severe bodily harm.
■ NEVER disconnect any "emergency or safety devices" .
These devices are intended for operator safety. Disconnection
of these devices can cause severe injury, bodily harm or even
death! Disconnection of any of these devices will void all
warranties.
TRANSPORTING
■ ALWAYS shutdown engine before transporting.
■ Tighten fuel tank cap securely and close fuel cock to prevent
fuel from spilling.
■ Drain fuel when transporting pump over long distances or
bad roads.
■ ALWAYS tie down the pump during transportation by securing
the pump's guard frame with rope.
■ NEVER open the pump housing during operation or start the
pump with the clean-out cover removed.The rotating impeller
inside the pump can cut or sever objects caught in it.
■ NEVER block or restrict flow from discharge hose. Remove
kinks from discharge line before starting pump. Operation
with a blocked discharge line can cause water inside pump
to overheat.
■ ALWAYS fill the pump casing with water before starting the
engine. Failure to maintain water inside the pump housing
will cause severe damage to the pump.
■ In winter drain water from pump housing to prevent freezing.

PAGE 10 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
QP-204H — SPECIFICATIONS/DIMENSIONS (PUMP)
Figure 1. QP-204H Dimensions
)pmuP(snoitacificepS.1elbaT
pmuP
ledoMH402-PQ
epyTpmuPlagufirtneC
eziSegrahcsiD&noitcuS).mm15(.ni00.2
gnipmuPmumixaM
yticapaC
etunim/snoll
ag241
)etunim/sretil835(
tfiL.xaM)sretem26.7(.tf52
daeH.xaM)sretem0.53(.tf511
noisnemiD
)HxWxL(
.ni0.61X0.41x
0.91
).mc04X53X84(
thgieWteNyrD ).gK62(.sbl75
19.5 IN.
(49.5 CM.)
14.6 IN.
(35 CM.)
16.0 IN.
(40 CM.)

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 11
QP-204H — SPECIFICATIONS/DIMENSIONS (ENGINE)
)enignE(snoitacificepS.2elbaT
enignE
ledoM ADNOH
2XP1U021XG/2XP1K021XG
epyT
elgniS,ekorts4delooc-riA
latnoziroH,VHO,rednilyC
enignEenilosa
GtfahS
ekortSXeroB .ni8.1x.ni7.2
)mm54xmm86(
tnemecalpsiD)ni-uc9.9(cc361
tuptuOxaM.M.P.R0063/.P.H5.5
yticapaC
knaTleuF snollag.S.U59.0.xorppA
)sretil6.3(
leuF elibomotuAdedaelnU
enilosaG
yticapaCliOebuL)stq36.0(sretil0
6.
lortnoCdeepS
dohteM epyTthgiew-ylFlagufirtneC
dohteMgnitratStratSlioceR
noisnemiD
)HxWxL(
.ni2.31x4.41x0.2
1
)mm533x263x403(
yrD
thgieWteN ).gK51(sbl1.33

PAGE 12 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
QP-204H — GENERAL INFORMATION
APPLICATION
The
QP204H Centrifugal Pump is designed to handle all types
of clear water applications. It is ideal for residential use such as
dewatering basements and swimming pools. Both the suction
and discharge ports on the QP-204H pump use a 2-inch diameter
opening, which allows the pump to pump at a rate of
approximately 142 gallons/minute (gpm) or 538 liters/minute
(lpm).
Centrifugal or self priming pumps are designed to purge air from
the suction line and create a partial vacuum in the pump body.
The reduced atmospheric pressure inside the pump allows water
to flow through the suction line and into the pump body. The
centrifugal force created by the rotating impeller pressurizes the
water and expels it from the pump.
Power Plant
This centrifugal pump is powered by an 4.0 horsepower air cooled
4-stroke, single cylinder
HONDA GX-120 gasoline engine that
incorporates a low "
Oil Alert Feature "
Oil Alert Feature
In the event of
low oil or no oil , the HONDA GX-120 engine has
a built-in oil alarm engine shut-down feature. In the event the oil
level is low the engine will automatically shut-down.
Standard Centrifugal Pump
Standard centrifugal pumps provide an economical choice for
general purpose dewatering. These types of pumps should only
be used in
clear water applications (agricultural, industrial,
residential) as they have a limited solid handling capability of
only 10% by volume.
Suction Lift
This pump is intended to be used for dewatering applications
and is capable of suction lifts up to 25 feet at sea level. For
optimal suction lift performance keep the suction hose or line as
short as possible. In general, always place the pump as close to
the water as possible.
Pump Support
The pump should always be placed on
solid stationary
ground
, on a level position.
NEVER place the pump on
soft soil . The suction hose or pipe
connection should always be checked for tightness and leaks. A
small suction leak in the hose or fittings could prevent the pump
from priming.
Elevation
Higher elevations will effect the performance of the pump. Due to
less atmospheric pressure at higher altitudes, pumps DO NOT
have the priming ability that they have at sea level. This is due to
the “thinner air” or lack of oxygen at higher altitudes.
A general rule of thumb is that for every 1,000 feet of elevation
above sea level a pump will lose one foot of priming ability.
For example, in Flagstaff, Arizona where the elevation is
approximately 7,000 feet, the pump would have a suction lift of
only 18 feet rather than the 25 feet at sea level. Table 3 shows
suction lift at various elevations.
Table 4 shows percentage drops in performance as elevation
increases.
suoiraVtassoLecnamrofreP.4elbaT
snoitavelE
edutitlA
sreteM(teeF wolFegrahcsiDdaeHegrahcsiD
leveLaeS%001%001
)016(000,2%79%59
)912,1(000,4%59%19
)928,1(000,6%3
9%78
)834,2(000,8%19%38
)840,3(000,01%88%87
snoitavelEsuoiraVtatfiLnoitcuS.3elbaT
edutitlA
)sreteM(teeF )sreteM(teeFnitfiLnoitcuS
leveLaeS)840.3(0.01)275.4(0.51)690.6(0.02)026.7(0.52
)016(000
,2)086.2(08.8)320.4(2.31)463.5(6.71)507.6(0.22
)912,1(000,4)773.2(08.7)665.3(7.11)457.4(6.51)349.5(5.91
)928,1(
000,6)301.2(09.6)961.3(4.01)602.4(8.31)372.5(3.71
)834,2(000,8)988.1(02.6)438.2(03.9)977.3(4.21)427.4(5.51
)840
,3(000,01)737.1(07.5)126.2(06.8)474.3(4.11)853.4(3.41

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 13
Figure 2 shows a typical application using the QP-204H centrifugal pump. Please note that this pump is intended for the removal of
clean water.
1. Pump – The model QP-204H is 2-inch centrifugal pump
used in general de-watering applications. Typical
dewatering applications consist of dewatering basements
and swimming pools.
2. Fill Cap – Prior to operation, the pump casing should be
filled with water. Remove this cap to add water to the pump.
After the initial prime, a sufficient amount of water will be
retained in the casing so that the operator will not need to
re-prime later.
If the casing is dry or has insufficient water, the pump will
have difficulty in priming which could lead to premature
mechanical seal wear thus causing damage to the pump.
3. Discharge Port – Connect a 2-inch discharge hose to this
port.
4. Worm Clamp – Used to secure the hose to the inlet and
outlet ports on the pump. Use two clamps to secure the
hose on the inlet side of the pump.
5. Discharge Hose – Connect this flexible rubber hose to
the discharge port on the pump. Make sure that the hose
lays flat and is not kinked. Use only recommended type
discharge hose. Contact Multiquip parts department for
ordering information.
6. Suction Port – Connect a 2-inch inlet hose to this port.
Use two worm clamps to secure the hose.
7. Suction Hose – Connect this flexible rubber hose to the
suction port on the pump. Make sure that the hose lays flat
and is not kinked. Use only recommended type suction
hose. Contact Multiquip parts department for ordering
information.
8. Drain Plug – Remove this plug to drain water from the
pump.
9. Strainer – Always attach a strainer to bottom side of the
suction hose to prevent large objects and debris from
entering the pump. Strainer should be positioned so that it
will remain completely under water. Running the pump with
the strainer above water for long periods can damage pump.
QP-204H — PUMP COMPONENTS
Figure 2. QP-204H Pump Application

PAGE 14 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
DANGER - Fueling The Engine
If pump is placed in a truck bed with a plastic liner,
REMOVE pump from truck bed and place on
ground (Figure 3) to refuel.The possibility of
fire
or explosion exists, due to static electricity.
Figure 3. Pump Refueling
QP-204H — REFUELING

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 15
QP-204H — BASIC ENGINE
Figure 4. Engine Controls and Components
INITIAL SERVICING
The engine (Figure 4) must be checked for proper lubrication and
filled with fuel prior to operation. Refer to the manufacturers engine
manual for instructions and details of operation and servicing.The
engine shown above is a HONDA engine, operation for other
types of engines may vary somewhat.
1. Fuel Filler Cap – Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely. DO NOT over fill.
6. Choke Lever – Used in the starting of a cold engine, or in
cold weather conditions. The choke enriches the fuel
mixture.
7. Air Cleaner – Prevents dirt and other debris from entering
the fuel system. Remove wing-nut on top of air filter
cannister to gain access to filter element.
8. Spark Plug – Provides spark to the ignition system. Set
spark plug gap to 0.6 - 0.7 mm (0.028 - 0.031 inch) Clean
spark plug once a week.
9. Muffler – Used to reduce noise and emissions.
10. Fuel Tank – Holds unleaded gasoline. For additional
information refer to engine owner's manual.
Operating the engine without an
air filter, with a damaged air filter,
or a filter in need of replacement
will allow dirt to enter the engine,
causing rapid engine wear.
2. Throttle Lever – Used to adjust engine RPM speed (lever
advanced forward
SLOW , lever back toward operator
FAST ).
3. Engine ON/OFF Switch – ON position permits engine
starting, OFF position stops engine operations.
4. Recoil Starter (pull rope) – Manual-starting method. Pull
the starter grip until resistance is felt, then pull briskly and
smoothly.
5. Fuel Valve Lever – OPEN to let fuel flow, CLOSE to stop
the flow of fuel.
NOTE
CAUTION - Fueling The Engine
Adding fuel to the tank should be done only when
the engine is stopped and has had an
opportunity to cool down. In the event of a fuel
spill, DO NOT attempt to start the engine until
the fuel residue has been completely wiped up,
and the area surrounding the engine is dry.
Engine components can generate extreme heat.
To prevent burns, DO NOT touch these areas
while the engine is running or immediately after
operating. NEVER operate the engine with the
muffler removed.
CAUTION - Burn Hazard

PAGE 16 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
QP-204H — PRE-INSPECTION (ENGINE)
Figure 5. Engine Oil Dipstick (Removal)
3. Insert and remove the dipstick without screwing it into the filler
neck. Check the oil level shown on the dipstick.
4. If the oil level is low (Figure 6), fill to the edge of the oil filler
hole with the recommended oil type (Table 5).Maximum oil
capacity is 1.16 quarts (1.1 liters)
Figure 6. Engine Oil Dipstick (Oil Level)
Pre-Inspection (Engine)
1. Read safety instructions at the
beginning of manual.
2. Clean the pump, removing dirt and
dust, particularly the engine
cooling air inlet, carburetor and air
cleaner.
3. Check the air filter for dirt and dust. If air filter is dirty, replace
air filter with a new one as required.
4. Check carburetor for external dirt and dust. Clean with dry
compressed air.
5. Check fastening nuts and bolts for tightness.
Engine Oil Check
1. To check the engine oil level, place the pump on secure
level ground with the engine stopped.
2. Remove the filler dipstick from the engine oil filler hole
(Figure 5) and wipe clean.
Fuel Check
1. Remove the gasoline cap located on top of fuel tank.
2. Visually inspect to see if the fuel level is low. If fuel is low,
replenish with unleaded fuel.
3. When refueling, be sure to use a strainer for filtration. DO
NOT top-off fuel. Wipe up any spilled fuel
immediately!
epyTliO.5elbaT
nosaeS erutarepmeT epyTliO
remmuS rehgiHroC°52 03-W01EAS
llaF/gnirpS C°01~C°52 02/03-W01EAS
retniW rewoLroC°0 01-W01EAS
Explosive Fuel
Diesel is extremely flammable, and its vapors
can cause an explosion if ignited. DO NOT
start the engine near spilled fuel or
combustible fluids. DO NOT smoke while
refueling. DO NOT attempt to refuel the pump
if the engine is
hot! or running .
WARNING - Explosive Fuel

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 17
Pre-Setup (Pump)
1. Read safety instructions at the
beginning of manual.
2. Place pump as near to water as
possible, on a firm flat, level surface.
3. To prime pump, remove fill cap (Figure 2) and fill pump casing
with water. If the pump casing is not filled with water before
starting, it will not begin pumping.
QP-204H — PRE-SETUP (PUMP)
4. Check for leaks betweenpumpandengine.If water is leaking
between the pump and engine housing, the seal inside the
pump may be worn or damaged. Continued operation of the
pumpisnot recommended.Furtherusage of the pump under
these conditions may cause severe water damage to engine.
Hoses and Clamps
1. Check that all hoses are
securely attached to the pump.
Make certain suction hose (Figure 2) does not have any air
leakage.Tighten hose clamps and couplings as required.
2. It is recommended that 2 clamps be used when securing the
suction hose to the inlet side (suction) of the pump.
3. Remember suction hoses must be
rigid enough not to
collapse when the pump is in operation.
4. Check that the discharge hose (Figure 2) is not restricted.
Place hose so that it lays as straight as it is possible on the
ground. Remove any twists or sharp bends from hose which
may block the flow of water.
NOTE Suction and discharge hoses are
available from Multiquip. Contact
your nearest dealer for more
information.
5. The discharge hose is usually a collapsible (thin-walled)
hose, however if a thin-walled discharge hose is not avail-
able, a rigid suction hose can be substituted in its place.
6. Make sure the suction strainer (Figure 2) is clean and
securely attached to the water end of the suction hose. The
strainer is designed to protect the pump by preventing large
objects from being pulled into the pump.
Pump casing must be filled with water before using pump.
Otherwise pump will not be able to begin pumping.
CAUTION - Pump Casing
DO NOT open fill cap if pump is hot!
Water inside may be under pressure.
The possibility exists of scalding,
resulting in severe bodily harm.
WARNING - High Pressure The strainer should be positioned so it will remain completely
under water . Running the pump with the strainer above
water for long periods can damage the pump.
CAUTION - Strainer
CAUTION - Flammable Fluids-Chemicals
DO NOT pump flammable fluids, corrosive chemicals or fluids
containing toxic substances. These fluids can create potentially
dangerous health and environmental hazards. Contact local
authorities for assistance.
CAUTION - Mechanical Seal
This pump uses a water-cooled mechanical seal to prevent
water from seeping into the engine. The passage of water
through the pump casing lubricates the seal and prevents it
from overheating.
NEVER! operate the pump without water
in the casing as this will cause damage to the mechanical
seal.

PAGE 18 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
QP-204H — INITIAL START-UP (ENGINE)
Starting the Engine ( HONDA engine)
1. Place the engine
fuel valve lever (Figure 7) to the "ON"
position.
2. Move the
throttle lever (Figure 8) away from the slow
position, about 1/3 of the way toward the fast position.
Figure 7. Engine Fuel Valve Lever (ON Position)
Figure 8. Throttle Lever (1/3 Start Position)
3. Place the
choke lever (Figure 9) in the " CLOSED " position
if starting a
cold engine.
4. Place the choke lever (Figure 10) in the " OPEN " position
if starting a
warm engine or the temperature is warm.
Figure 10. Engine Choke Lever (Open)
Figure 9. Engine Choke Lever (Closed)
5. Place the
engine ON/OFF switch (Figure 11) in the " ON "
position.
Figure 11. Engine ON/OFF Switch (ON Position)
This section is intended to assist the operator with the
initial
start-up
of the trash pump. It is extremely important that this
section be read carefully before attempting to use the pump in
the field.
DO NOT attempt to operate the pump until
the Safety, General Information and
Inspection sections of this manual have
been
read and thoroughly understood .
CAUTION - Read Manual

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 19
QP-204H — INITIAL START-UP (ENGINE)
6. Grasp the starter grip (Figure 12) and slowly pull it out.The
resistance becomes the hardest at a certain position, corre-
spondingtothecompressionpoint.Pullthestarter grip briskly
and smoothly for starting.
7. If the engine has started, and the choke lever was moved to
the
CLOSED position to start the engine, gradually move the
choke lever lever to the
OPEN position as the engine warms
up.If the engine has not started repeat steps 1 through 6.
Figure 12. Starter Grip
8. Before the pump is placed into operation, run the engine for
several minutes. Check for fuel leaks, and noises that would
associate with a lose component.
9. To begin pumping, place the throttle lever (Figure 14) in the
"
RUN" position .
Figure 13. Choke Lever (Open)
Figure 14. Throttle Lever (Run)
Stopping The Engine
Normal Shutdown
1. Move the throttle lever to the IDLE position (Figure 15) and
run the engine for three minutes at low speed.
Figure 15.Throttle Lever (Idle)
2. After the engine
cools , turn the engine ON/OFF switch to the
“OFF” position (Figure 16).
3. Place the fuel shut-off lever (Figure 17) in the OFF
position.
Figure 16. Engine ON/OFF Switch (OFF)
Figure 17. Fuel Valve Lever (OFF)
Emergency Showdown
1. Move the throttle lever quickly to the IDLE position, and place
the engine ON/OFF switch in the
OFF position.
ALWAYS run engine at full speed while pumping.
CAUTION - Maximum Engine Speed

PAGE 20 — QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL — REV. #3 (06/05/06)
QP-204H — MAINTENANCE (PUMP)
To perform the pump vacuum test do the following:
1. Remove the pump fill cap (Figure 2), and fill the pump
with water.
2. Start the engine as outlined in the initial start-up section,
and wait for the pump to begin pumping.
3. As shown in Figure 18 (next page), place a water hose
inside the discharge opening of the pump, and turn on
the water. This flow of water into the discharge opening
will
prevent the pump from running dry.
4. Place the Pump Vacuum Tester (P/N 7000030) over
the pump suction (inlet) opening (Figure 18) with the
vacuum gauge facing upwards. It may be necessary to
apply a small amount of water around the rubber seal of
the vacuum tester to make a good suction fit.
5. Check and make sure that there are no air leaks between
the vacuum tester and the inlet port on the pump. If air
leaks are present reset vacuum tester.
6. Run the pump for a few minutes while monitoring the
vacuum gauge. If the gauge indicates a reading between
-25 and -20 in. Hg. (inches of mercury) then it can be
assumed that the pump is working correctly.
Pump Vacuum Test
25 in. Hg (inches of mercury)
translates into 25 feet of lift at sea
level .
7. If the vacuum tester gauge indicates a reading
below -20 in. Hg, it can then be assumed that the pump
is not functioning correctly, and corrective action needs
to be taken.
8. To test the
flapper valve , shut down the engine. The
vacuum tester should remain attached to the pump
suction inlet port by vacuum. This indicates the pump's
flapper valve is seating properly to hold water in the
suction hose when the engine is stopped.This prevents
backflow and allows for faster priming when the engine
is restarted.
NOTE
CAUTION - Pump Priming
DO NOT attempt to start the engine unless the pump has
previously been
primed with water. Severe pump damage
will occur if pump has not been primed.

QP-204H CENTRIFUGAL PUMP — OPERATION AND PARTS MANUAL— REV. #3 (06/05/06) — PAGE 21
QP-204H — MAINTENANCE (PUMP)
-15
-30
-10
-5
in. Hg
kPa
WIKA
R
-100
-80
-60 -40
-20
ACCEPTABLE READING
SHOULD BE BETWEEN
-25 AND -20 IN. HG.
25 IN. HG. TRANSLATES
INTO 25 FEET OF LIFT
AT SEA LEVEL.
PLACE VACUUM TESTER
OVER PUMP SUCTION PORT
CAUTION
DO NOT RUN PUMP
WITHOUT WATER.
-25
-20
DISCHARGE
PORT
PUMP VACUUM
TESTER
DIRECTION
OF WATER
FLOW
WATER HOSE
SOURCE
WATER
Pressure reading may vary
depending on altitude. See Tables 3
and 4.
NOTE
Figure 18. Pump Vacuum Tester