Pacific hydrostar 66585 Parts list manual

1” CLEAR
WATER PUMP
With 1.5 HP 2-Stroke Gas Engine
Model 66585
ASSEMBLY AND OPERATION INSTRUCTIONS
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright©2008 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork
contained herein may be reproduced in any shape or form without the express written consent of
Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Manual Revised 10d
Using an engine indoors CAN KILL YOU IN
MINUTES.
Engine exhaust contains carbon monoxide.
This is a poison you cannot see or smell.
NEVER use inside
a home or garage,
EVEN IF doors and
windows are open.
Only use OUTSIDE
and far away from
windows, doors, and
vents.

Page 2For technical questions, please call 1-800-444-3353.SKU 66585
SPECIFICATIONS
Suction Port Diameter 1” TPI
Discharge Port Diameter 1” TPI
Maximum Suction Head 19-1/2 ft.
Total Head 59 ft.
Maximum Discharge
Flow 31 GPM
Pump Type Centrifugal / Self-Priming*
Engine Specications
1.5 HP / 2-Stroke / Recoil Start /
Displacement: 52cc
Rotation: Counterclockwise
(from shaft side)
Unleaded Fuel: Min. 87 Octane
Fuel Tank Capacity: .31 Gal.
(40 oz.)
1-1/2 operating hours at half
loading (full tank)
Included
Accessories
Plastic Basket Filter
Hose Coupling
Hose Adapters / Barbed Fittings
/ Gasket / Wire Clamps
* The Water Pump is self-priming. However, for the initial use
the Pump Housing must be lled with water (see page 9).
NOTE: This two cycle engine is fueled by a
25:1 ratio of 87+ octane unleaded fuel and a
two-stroke engine oil (10 oz. of oil).
IMPORTANT! THIS PUMP IS FOR CLEAR WATER
USE ONLY. Clear water is water that contains
little to no solids.
IMPORTANT! This product requires oil and fuel
to be added before starting. Attempting to
start the Engine without oil WILL ruin the
Engine and void the warranty.
The Emission Control System for
this Water Pump’s Engine is warranted for
standards set by the U.S. Environmental
Protection Agency. For warranty information,
refer to the last two pages of this manual.
NOTE: At high altitudes, the engine’s
carburetor, governor (if so equipped), and any
other parts that control the fuel-air ratio will
need to be adjusted by a qualied mechanic
to allow efcient high-altitude use and to
prevent damage to the engine and any other
devices used with this product.
SAVE THIS MANUAL
You will need this manual for safety
warnings and precautions, assembly,
operating, inspection, maintenance and
cleaning procedures, parts list and assembly
diagram. Keep invoice with manual. Write
invoice number on inside of front cover. Write
product’s serial number in back of manual
near assembly diagram, or write month and
year of purchase if product has no number.
Keep manual and invoice in a safe and dry
place for future reference.
Pump Applications
Clear Water ** •
Slimy Water •
Muck Water •
Silt Water •
High Solid Content N/A
Slow Seepage N/A
Fast Seepage •
Manholes N/A
Cofferdams N/A
Quarries N/A
Septic Tanks N/A
Deep Piling N/A
Industrial/ Agricultural Chemicals N/A
This Water Pump can be used to supply water to:
Mixer or Paver N/A
Concrete Curing N/A
Water Wagons ** N/A
Sprinklers or Nozzle N/A
** Non Potable Only
N/A = Not Applicable
REV 10d

Page 3For technical questions, please call 1-800-444-3353.SKU 66585
IMPORTANT SAFETY
INFORMATION
In this manual, on the labeling, and
all other information provided with
this product:
This is the safety alert
symbol. It is used to alert
you to potential personal
injury hazards. Obey all
safety messages that follow
this symbol to avoid possible
injury or death.
DANGER indicates a
hazardous situation
which, if not avoided, will result
in death or serious injury.
WARNING indicates a
hazardous situation
which, if not avoided, could
result in death or serious injury.
CAUTION, used with
the safety alert
symbol, indicates a hazardous
situation which, if not avoided,
could result in minor or moderate
injury.
NOTICE is used to
address practices not
related to personal injury.
CAUTION, without the
safety alert symbol, is
used to address practices not
related to personal injury.
WARNING! Read all instructions.
Failure to follow all instructions
listed below may result in re,
serious injury and/or DEATH.
The warnings and precautions
discussed in this manual cannot cover
all possible conditions and situations
that may occur. It must be understood
by the operator that common sense
and caution are factors which cannot
be built into this product, but must be
supplied by the operator.
SAVE THESE INSTRUCTIONS
SET UP PRECAUTIONS
Fuel and fumes are ammable, and 1.
potentially explosive. Use proper fuel
storage and handling procedures.
Do not store fuel or other ammable
materials nearby.
Have multiple ABC class re 2.
extinguishers nearby.
Operation of this equipment may create3.
sparks that can start res around dry
vegetation.
A spark arrestor may be required.
The operator should contact local re
agencies for laws or regulations relating
to re prevention requirements.
Set up and use only on a at, level, well-4.
ventilated surface.
Wear ANSI-approved safety goggles,5.
heavy-duty work gloves, and dust mask/
respirator during set up.
Use only oil and fuel recommended6.
in the “Specications” section of this
manual.
Do not use fuel/oil mix containing more7.
than 10% ethanol (E10). Do not use E85
ethanol.

Page 4For technical questions, please call 1-800-444-3353.SKU 66585
OPERATING PRECAUTIONS
1. CARBON MONOXIDE
HAZARD
Using an engine indoors
CAN KILL YOU IN MINUTES.
Engine exhaust contains
carbon monoxide. This is a poison you
cannot see or smell.
NEVER use inside a home or garage,
EVEN IF doors and windows are open.
Only use OUTSIDE and far away from
windows, doors, and vents.
Keep children away from the equipment,2.
especially while it is operating.
Do not leave the equipment unattended3.
when it is running. Turn off the
equipment (and remove safety keys, if
available) before leaving the work area.
Wear ANSI-approved safety goggles and4.
hearing protection during use.
People with pacemakers should5.
consult their physician(s) before use.
Electromagnetic elds in close proximity
to a heart pacemaker could cause
pacemaker interference or pacemaker
failure. Caution is necessary when near
the engine’s magneto or recoil starter.
Use only accessories that are6.
recommended by Harbor Freight Tools
for your model. Accessories that may
be suitable for one piece of equipment
may become hazardous when used on
another piece of equipment.
Do not operate in explosive7.
atmospheres, such as in the presence of
ammable liquids, gases, or dust. Fuel-
powered engines may ignite the dust or
fumes.
Stay alert, watch what you are doing8.
and use common sense when operating
this piece of equipment. Do not use
this piece of equipment while tired or
under the inuence of drugs, alcohol or
medication.
Do not overreach. Keep proper footing9.
and balance at all times. This enables
better control of the equipment in
unexpected situations.
Dress properly. Do not wear loose10.
clothing or jewelry. Keep hair, clothing
and gloves away from moving parts.
Loose clothes, jewelry or long hair can
be caught in moving parts.
Parts, especially exhaust system11.
components, get very hot during use.
Stay clear of hot parts.
Do not cover the engine or equipment12.
during operation.
Keep the equipment, engine, and13.
surrounding area clean at all times.
Use the equipment, accessories, etc., in14.
accordance with these instructions and
in the manner intended for the particular
type of equipment, taking into account
the working conditions and the work to
be performed. Use of the equipment for
operations different from those intended
could result in a hazardous situation.
Do not operate the equipment with15.
known leaks in the engine’s fuel system.

Page 5For technical questions, please call 1-800-444-3353.SKU 66585
WARNING: The brass components of16.
this product contain lead, a chemical
known to the State of California to cause
birth defects (or other reproductive
harm). (California Health & Safety code §
25249.5, et seq.)
This product contains or, when used,17.
produces a chemical known to the State
of California to cause cancer and birth
defects or other reproductive harm.
(California Health & Safety Code §
25249.5, et seq.)
When spills of fuel or oil occur, they must18.
be cleaned up immediately. Dispose
of uids and cleaning materials as per
any local, state, or federal codes and
regulations. Store oil rags in a bottom-
ventilated, covered, metal container.
Keep hands and feet away from moving19.
parts. Do not reach over or across
equipment while operating.
Before use, check for misalignment20.
or binding of moving parts, breakage
of parts, and any other condition that
may affect the equipment’s operation.
If damaged, have the equipment
serviced before using. Many accidents
are caused by poorly maintained
equipment.
Use the correct equipment for the21.
application. Do not modify the
equipment and do not use the equipment
for a purpose for which it is not intended.
Industrial applications must follow OSHA22.
guidelines.
SERVICE PRECAUTIONS
Before service, maintenance, or1.
cleaning:
Turn the Power Switch (40) to itsa.
“OFF” position.
Allow the engine to completely cool.b.
Then, remove the spark plug wire(s)c.
from the spark plug(s).
Keep all safety guards in place and in2.
proper working order. Safety guards
include mufer, air cleaner, mechanical
guards, and heat shields, among other
guards.
Do not alter or adjust any part of the3.
equipment or its engine that is sealed
by the manufacturer or distributor.
Only a qualied service technician
may adjust parts that may increase or
decrease governed engine speed.
Wear ANSI-approved safety goggles,4.
heavy-duty work gloves, and dust mask/
respirator during service.
Maintain labels and nameplates on5.
the equipment. These carry important
information. If unreadable or missing,
contact Harbor Freight Tools for a
replacement.
Have the equipment serviced by a6.
qualied repair person using only
identical replacement parts. This will
ensure that the safety of the equipment
is maintained. Do not attempt any
service or maintenance procedures
not explained in this manual or any
procedures that you are uncertain about
your ability to perform safely or correctly.
Store equipment out of the reach of7.
children.
Follow scheduled engine and equipment8.
maintenance.

Page 6For technical questions, please call 1-800-444-3353.SKU 66585
Refueling Precautions:9.
Do not smoke, or allow sparks, ames, a.
or other sources of ignition around the
equipment, especially when refuelling.
Do not rell the fuel tank while the b.
engine is running or hot.
Do not ll fuel tank to the top. Leave c.
a little room for the fuel to expand as
needed.
Refuel in a well-ventilated area only.d.
SAVE THESE
INSTRUCTIONS.
UNPACKING
When unpacking, check to make sure
all of the parts shown on the Parts List in
this manual are included. If any parts are
missing or broken, please call Harbor Freight
Tools at the number shown on the cover (and
at the bottom of each page) of this manual as
soon as possible.
CONTROLS AND FEATURES
DRAIN PLUG (38A)
STARTER
HANDLE (7)
INTAKE PORT (19A)
FUEL TANK CAP (94)
FUEL TANK (89)
FRAME (26A)
Figure 1
COUPLING
GASKET
(17A)
PRIMING PLUG (14A)
DISCHARGE PORT (18A)
ENGINE
KILL
SWITCH
(40)
HOSE
COUPLING
(16A)
INTAKE
FILTER
(25A)
INTAKE
FILTER
COVER (39A)
HOSE
CLAMPS
(24A)
SPARK PLUG
CAP (54)
THROTTLE
(96)
CHOKE (76)
HOSE COUPLER (15A)
(Suction Hose Connection)
HOSE COUPLER (15A)
(Discharge Hose Connection)

Page 7For technical questions, please call 1-800-444-3353.SKU 66585
CONNECTING HOSES
The Suction Hose (not included)
MUST be reinforced with braided material
or have non-collapsible construction. Do
not use Hose with inside diameter smaller
than 1” (pump’s Intake Port (19A) diameter).
Slide Hose Coupler (15A) over Hose1.
Coupling (16A). Insert Coupling Gasket
(17A) into end of Hose Coupler. See
Figure 2, below.
Screw Hose Coupler (15A) clockwise2.
onto Intake Port (19A) until fastened
securely. See Figure 3, below.
Slide Hose Clamp (24A) over end of3.
Suction Hose (not included). Slide Hose
onto Hose Coupling. Use a screwdriver
(not included) to tighten Hose Clamp
until secure. See Figure 4, below.
Slide second Hose Clamp over other end4.
of Suction Hose. Attach Hose to Intake
Filter Cover (39A). Use screwdriver to
tighten Clamp until secure. See Figure 5.
For the Discharge Hose (not included),5.
slide the other Hose Coupler (15A) over
the other Hose Coupling (16A). Insert
the other Coupling Gasket (17A) into the
end of Hose Coupler. See Figure 2.
Thread the Hose Coupler clockwise onto6.
Discharge Port (18A) until tightened
securely.
Slide other Hose Clamp over end7.
of Discharge Hose and then slide
Discharge Hose onto Hose Coupling.
Use a screwdriver to tighten Hose Clamp
until secure. See Figure 6.
WARNING!8. Do not over-tighten Hose
Clamps as the clamp may damage the
hose.
Figure 2
HOSE COUPLER (15A) HOSE COUPLING (16A)
COUPLING
GASKET (17A)
INTAKE PORT
(19A)
HOSE
COUPLER
(15A)
Figure 3
HOSE COUPLER
(15A)
HOSE CLAMP
(24A)
SUCTION HOSE
(not included)
Figure 4
HOSE CLAMP
(24A)
SUCTION
HOSE
INTAKE
FILTER
(25A)
Figure 5
HOSE CLAMP
(24A)
DISCHARGE
HOSE
(not included)
HOSE COUPLER
(15A)
DISCHARGE
PORT
(18A)
Figure 6
INTAKE FILTER
COVER (39A)

Page 8For technical questions, please call 1-800-444-3353.SKU 66585
LOCATING THE WATER PUMP
Make sure the Water Pump is located1.
on a at, level, sturdy surface capable of
supporting the weight of the Pump and
any additional tools and equipment.
For best Pump performance, place the2.
Pump near the water level and use
hoses that are no longer than necessary.
That will allow the Pump to produce the
greatest output with the least self-priming
time. See diagram below.
As the head (pumping height) increases,
pump output decreases. The length,
type, and size of the suction and
discharge hoses can also signicantly
affect Pump output.
Discharge head capability is always
greater than suction head capability.
Which means pumping height for the
Intake Hose (suction head) should be
shorter than the pumping height for the
Discharge Hose.
Minimizing suction head (placing the
Pump closer to the water level) will also
help reduce self-priming time. This is the
time it takes the Pump to bring the water
from the water level to the Pump during
the initial operation.
Route the Intake Hose with the Intake3.
Filter fully immersed in the water supply
source.
Place Filter into water to be pumped.4.
WARNING! Filter must be fully
immersed in water. Do not operate
Pump without Filter connected to end
of suction hose. Keep Filter out of sand
or silt by placing Filter in bucket or on
stones. See diagram below.
Secure the Intake Hose in place to keep5.
it from moving once the Pump is turned
on. The Intake Hose should be as short
as possible for more efcient operation.
Route the discharge hose to the desired6.
discharge location. If necessary, connect
additional discharge hoses to direct the
discharge to the desired location. Then
make sure to secure the discharge hose
in place to keep it from moving once the
Water Pump is turned on. The discharge
hose should be kept as short as possible
for more efcient operation.
CAUTION!7. Be aware of the following
problems during operation, and how to
x them:
1. Cavitation: This is the sudden
formation and collapse of low-pressure
vapor (bubbles) across the vanes of the
impeller.
Cause: When the surface pressure
on a liquid becomes low enough, the
Total Head
Suction
Head
Water Pump
Discharge Head
Filter

Page 9For technical questions, please call 1-800-444-3353.SKU 66585
liquid will begin to boil (even at room
temperature). With centrifugal pumps,
cavitation can occur when the suction
vacuum becomes too great, allowing
water vapor or bubbles to form at the
impeller. The rapid pressure increase
can cause impeller damage.
Solution: Minimizing suction head and
using the largest practical suction hose
diameter will reduce the likelihood of
cavitation. Do not use a suction hose
with a diameter smaller than the
Pump’s Intake Port (2” diameter).
2. Water Hammer Pressure: This is
energy sent back to the Pump due to
sudden stoppage of water owing from
the Pump.
Cause: Water hammer pressure is more
likely to occur when using a very long
discharge hose. If the ow of water at
the end of the discharge hose is shut
off suddenly, energy is sent back to the
pump. This causes a large pressure
spike in the Pump housing, leading to
potential damage to the Pump casing.
Solution: Use as short a discharge hose
as possible or shut off water ow slowly.
ENGINE PRE-START INSTRUCTIONS
Disconnect the Spark Plug Cap (54) from1.
the Engine.
IMPORTANT! Your Warranty is voided2.
if you do not properly mix the fuel and
oil before fueling engine. Never run
the Engine with improper Engine oil
to fuel mixture. Running the Engine
with low or no oil will permanently
damage the Engine.
To ll the Fuel Tank (89), unscrew and 3.
remove the Fuel Tank Cap (94). Fill the
Fuel Tank with a 25:1 ratio of mid-to-
high (minimum 87 octane) unleaded
fuel and 2 stroke engine oil (10 oz of
oil). Then replace the Fuel Tank Cap.
Thereafter, check the Fuel Tank Gauge
for the amount of unleaded fuel-oil
mixture. When necessary, rell the Fuel
Tank.
Before every use, the pump housing4.
must be lled with water. Unscrew
Priming Plug and add water to the Pump
Housing.
IMPORTANT! Check for water in the Pump
Housing before each use. Never attempt
to run the Water Pump without water
inside the Pump Housing. Running
the Water Pump without water will
damage the Water Pump Gaskets and
void the Warranty.
TO START AND STOP THE ENGINE
Re-connect the Spark Plug Cap to the1.
Spark Plug (51) of the Engine.
Turn Engine’s Choke (76) to its2.
“CHOKE” position, to far right.
NOTE:3. No choke is required if the
Engine is warm. Make sure the Choke
is in the “RUN” position when starting a
warm Engine.
Turn the Engine’s Throttle (96) to its4.
“FAST” position (to the left.)
Grasp the Starter Handle (7), and pull5.
slowly until resistance is felt. Allow the
Starter rope to rewind slowly. Then
pull the Starter Handle with a rapid, full
arm stroke. Allow the Starter rope to
rewind slowly. If necessary, repeat this
procedure until the Engine starts.

Page 10For technical questions, please call 1-800-444-3353.SKU 66585
Once the Engine starts, slowly move6.
the Engine Choke to its “RUN” position.
Then adjust the Engine Throttle to the
speed (RPM) you desire.
Once the Engine starts, the Water Pump7.
will run continuously until the Engine is
turned off. To turn off the Engine, press
the Engine Kill Switch (40).
Allow the Water Pump and its Engine to8.
completely cool before moving or storing
the Pump.
INSPECTION, MAINTENANCE, AND
CLEANING
TO PREVENT
SERIOUS INJURY
FROM ACCIDENTAL STARTING:
Turn the Power Switch of the
equipment to its “OFF” position,
wait for the engine to cool, and
disconnect the spark plug wire(s)
before assembling or making any
adjustments to the equipment.
Before each use, inspect the general
condition of the Water Pump and
its Engine. Check for loose parts,
misalignment or binding of moving parts,
damaged parts, loose hose connections,
and any other condition that may affect
the safe operation of the Water Pump. If
abnormal noise or vibration occurs, have
the problem corrected before further use.
Do not use damaged equipment.
ENGINE MAINTENANCE
Note: This maintenance schedule is
intended solely as a general guide. If
performance decreases or if equipment
operates unusually, check systems
immediately. The maintenance needs
of each piece of equipment will differ
depending on factors such as duty cycle,
temperature, air quality, fuel quality, and
other factors.
Note: These procedures are in addition to
the regular checks and maintenance
explained as part of the regular operation
of the engine and equipment.
After Initial 20 Operation Hour Period:
Change engine oil.a.
Every 25 Operation Hours Thereafter:
Clean/replace air lter element.a.
Replace spark plug.b.
Every 50 Operation Hours:
Change engine oil.a.
Replace fuel lter (if equipped).b.
Every 100 Operation Hours:
Replace air lter element.a.
Note: All maintenance procedures scheduled
for 25, 50, and 100 operation hours
should be performed at least yearly.
Every 300 Operation Hours:
Clean fuel tank and carburetor.a.
Clean carbon build-up from combustionb.
chamber.
WATER PUMP MAINTENANCE
Before each use, check the Intake Filter1.
for accumulated debris, rocks, and other
objects that may clog the Filter.
Before each use, check to make sure2.
there is water in the Water Pump
Housing. If there is not enough water,
unscrew the Priming Cap and add water
to the Pump Housing.
If the Water Pump is not in use due to3.
dry conditions, etc., prime the Water

Page 11For technical questions, please call 1-800-444-3353.SKU 66585
Pump Housing and activate the unit once
every three months.
In cold weather, when the Water Pump4.
is not in use, protect the interior of
the Pump from freezing by draining
any remaining water from the Pump
Housing and pumping a permanent type
automotive anti-freeze containing a rust
inhibitor through the system. Flush the
system with a neutralizing liquid prior to
re-use of the unit.
To clean the Water Pump, use a garden5.
hose and a mild detergent. Avoid
introducing water into the interior parts of
the Engine.
When storing the Water Pump, make6.
sure to store the unit in a clean, dry, safe
location out of reach of children and
other unauthorized people.
CAUTION! All maintenance, service, or
repairs not mentioned in this manual
must only be performed by a qualied
service technician.
Storage
Wait for engine to cool, then clean1.
engine with clean cloth.
When the equipment is to remain idle for2.
longer than 20 days, prepare the engine
for storage as follows:
Either leave fuel tank empty or rell fuel a.
tank with fresh unleaded fuel/oil mix and
fuel stabilizer intended for long term
engine storage (not included). After
lling, run engine for about 5 minutes to
circulate the treated fuel/oil mix through
the carburetor. Wait for engine to cool
before proceeding.
Disconnect battery cables (if equipped).b.
Empty the primer tank of all water.3.
Apply a thin coat of rust preventive oil to4.
all uncoated metal parts.
Cover and store in a dry, well-ventilated5.
area out of reach of children.
Before starting the engine after storage,6.
keep in mind that untreated fuel will
deteriorate quickly. Drain the fuel
tank and lter, and change to fresh
fuel if untreated fuel has been sitting
for a month, if treated fuel has been
sitting beyond the fuel stabilizer’s
recommended time period, or if the
engine does not start properly.

Page 12For technical questions, please call 1-800-444-3353.SKU 66585
Troubleshooting
Problem Possible Causes Probable Solutions
Engine will not
start
FUEL RELATED:
No fuel in tank.1.
Choke not in start position, especially2.
with cold engine.
Low quality or deteriorated, old fuel/oil3.
mix.
Carburetor not primed.4.
Dirty fuel passageways blocking fuel5.
ow.
Carburetor needle stuck. Fuel can be6.
smelled in the air.
Too much fuel in chamber. This can7.
be caused by the carburetor needle
sticking.
FUEL RELATED:
Fill fuel tank.1.
Move choke to start position if engine is2.
cold.
Use only fresh 87+ octane unleaded fuel/3.
oil mix.
Prime carburetor by pressing priming bulb4.
specied number of times (if equipped).
Clean out passageways using fuel additive.5.
Heavy deposits may require further
cleaning.
Gently6. tap side of carburetor oat chamber
with screwdriver handle.
Turn choke to run position. Remove spark7.
plug and pull the start handle several times
to air out the chamber. Reinstall spark plug
and set choke to start position.
IGNITION (SPARK) RELATED:
Spark plug wire not connected securely.1.
Spark plug electrode wet or dirty.2.
Incorrect spark plug gap.3.
Spark plug wire or spark plug broken.4.
Incorrect spark timing or faulty ignition5.
system.
IGNITION (SPARK) RELATED:
Connect spark plug wire properly.1.
Clean spark plug.2.
Correct spark plug gap.3.
Replace spark plug wire and/or spark plug.4.
Have qualied technician diagnose/repair 5.
ignition system.
COMPRESSION RELATED:
Cylinder not lubricated. Results in1.
problem after long storage periods.
Loose or broken spark plug. (Hissing2.
noise will occur when trying to start.)
Loose cylinder head or damaged head3.
gasket. (Hissing noise will occur when
trying to start.)
Engine valves or tappets mis-adjusted or4.
stuck.
COMPRESSION RELATED:
Pour tablespoon of oil into spark plug hole.1.
Crank engine a few times and try to start
again.
Tighten spark plug. If that does not work,2.
replace spark plug. If problem persists,
may have head gasket problem, see #3.
Tighten head. If that does not remedy3.
problem, replace head gasket.
Adjust valve clearance. If that does not4.
work, clean or replace valves/tappets.
Engine misres Spark plug wire loose.1.
Incorrect spark plug gap or damaged2.
spark plug.
Defective spark plug wire.3.
Old or low quality fuel/oil mix.4.
Incorrect compression.5.
Check wire connections.1.
Re-gap or replace spark plug.2.
Replace spark plug wire.3.
Fill fuel tank with fresh 87+ octane4.
unleaded fuel/oil mix.
Diagnose and repair compression. (Use5.
Engine will not start: COMPRESSION
RELATED section.)
Follow all safety precautions whenever diagnosing or servicing the
equipment or engine.

Page 13For technical questions, please call 1-800-444-3353.SKU 66585
Troubleshooting
Problem Possible Causes Probable Solutions
Engine stops
suddenly
Low oil shutdown.1.
Fuel tank empty or full of impure or low2.
quality fuel/oil mix.
Defective fuel tank cap creating3.
vacuum, preventing proper fuel ow.
Improper idle speed.4.
Faulty magneto, incorrect timing, or5.
clogged carburetor.
Fill engine oil to proper level. Check engine1.
oil before EVERY use.
Fill fuel tank with fresh 87+ octane unleaded2.
fuel/oil mix.
Test/replace fuel tank cap.3.
Properly adjust idle speed.4.
Have qualied technician diagnose and 5.
service engine.
Engine knocks Old or low quality fuel/oil mix.1.
Engine overloaded.2.
Incorrect spark timing, deposit buildup,3.
worn engine, or other mechanical
problems.
Fill fuel tank with fresh 87+ octane unleaded1.
fuel/oil mix.
Do not exceed equipment’s load rating.2.
Have qualied technician diagnose and 3.
service engine.
Engine
backres
Impure or low quality fuel/oil mix.1.
Engine too cold.2.
Choke not open after engine warm.3.
Engine not properly adjusted for high4.
altitude operation.
Intake valve stuck, choke stuck,5.
incorrect timing, clogged carburetor, or
overheated engine.
Fill fuel tank with fresh 87+ octane unleaded1.
fuel/oil mix.
Use cold weather fuel and oil additives to2.
prevent backring.
Move choke to run position after engine3.
warms up.
Qualied technician must adjust engine at 4.
altitudes greater than 5,000 feet above sea
level.
Have qualied technician diagnose and 5.
service engine.
Pump does not
pump water
Pump is not primed.1.
Filter clogged.2.
Air leak at connector.3.
Hose leaks.4.
Suction hose has collapsing wall.5.
Hose has too small diameter6.
Suction lift is too high.7.
Prime Pump.1.
Clean Filter or replace if damaged.2.
Replace Coupling Gasket or tighten clamp.3.
Replace hose.4.
Use hose with non-collapsible wall.5.
Use hose with diameter 1” or greater.6.
Adjust suction lift.7.
Low Pump
Output
Suction hose collapsed, damaged, too1.
long or diameter is too small.
Air leak at connector.2.
Filter clogged.3.
Discharge hose damaged, too long or4.
diameter too small.
Replace or adjust suction hose.1.
Replace Coupling Gasket or tighten Clamp.2.
Clean Filter.3.
Replace or adjust Discharge Hose.4.
Follow all safety precautions whenever diagnosing or servicing the equipment
or engine.

Page 14For technical questions, please call 1-800-444-3353.SKU 66585
Part Description Qty.
1A Casing Cover 1
2A O-Ring 1
3A Spring Washer (M6) 4
4A Bolt (6x40) 4
5A Mechanical Seal 1
6A Impeller 1
7A Inner Casing 1
8A O-Ring 1
9A Casing 1
10A Seal Gasket 1
11A Flat Washer (M8) 7
12A Bolt (8x20) 4
13A O-Ring 2
14A Priming Plug 2
15A Hose Coupler 2
16A Hose Coupling 2
17A Coupling Gasket 2
18A Discharge Port 1
19A Intake Port 1
20A Check Valve 1
Part Description Qty.
21A Bolt (8x20) 4
22A Bolt (8x20) 4
23A Flat Washer (M8) 4
24A Hose Clamp 3
25A Intake Filter 1
26A Frame 1
27A Nut (M8) 4
28A Shock Absorber 4
29A Pad 4
30A Bolt (8x20) 4
31A Nut (M8) 2
32A Bolt (8x25) 2
33A Bolt (5x40) 1
34A Flat Washer 1
35A Lever 1
36A Nut (M5) 1
37A Pull Wire 1
38A Drain Plug 1
39A Intake Filter Cover 1
PARTS LIST & ASSEMBLY DIAGRAM - WATER PUMP
38A
39A

Page 15For technical questions, please call 1-800-444-3353.SKU 66585
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not available individually as
replacement parts.
PARTS LIST - ENGINE
Part Description Qty.
1 Set Screw (M5 x 12) 1
2 Gasket 1
3 Reel 1
4 Starter Rope 1
5 Spiral Spring 1
6 Rewind Starter Assy 1
7 Starter Handle 1
8 Handle Clip 1
9 Screw (M5 x 20) 6
10 Crankcase Gasket 1
11 Nut (M8) 1
12 Starter Claw 1
13 Starter Reed 1
14 Pulley 1
15 Outer Snap Ring (4) 1
16 Small Oil Seal 2
17 Crankcase Cover 1
18 Ball Bearing (6201/P5) 2
19 Crankshaft (Complete) 1
20 Woodruff Key (3 x 5 x13) 1
21 Set Pin (B4 x10) 2
22 Screw (M5 x 12) 2
23 Crankcase 1
24 Washer (M8) 2
25 Set Pin (B4 x10) 2
26 Screw (8 X 16) 2
27 Screw (M5 x 30) 4
28 Rotor 1
29 Nut (M8) 1
30 Stator 1
31 Flameout Line 1
32 Screw (M5 x 21) 3
33 Transmission Shaft 1
34 Ball Bearing (6020) 1
35 Ferrule 1
36 Washer (M6) 4
37 Screw (6 x18) 4
38 Fan 1
39 Screw (M5 x 20) 4
40 Power Switch 1
41 Piston Pin 1
42 Piston Pin circlip 2
43 Piston 1
44 Piston Pin 1
45 Crankcase Gasket 1
46 Piston Ring 2
47 Cylinder Gasket 1
48 Cylinder Cover 1
Part Description Qty.
49 Bolt (M5 x 18) 4
50 Cylinder Cover 1
51 Spark Plug 1
52 Spark Plug Clip Reed 1
53 Spark Plug Cover 1
54 Spark Plug Cap 1
55 Cap Cover 1
56 Top Cover 1
57 Screw (M5 x 20) 1
58 Mufer insulator 1
59 Mufer 1
60 Socket Head Bolt (M5 x 12) 1
61 Socket Head Bolt (M5 x 12) 1
62 Label 1
63 Stud 2
64 Nut (M6) 2
65 Mufer Protection Cover 1
66 Intake Port Gasket 2
67 Intake Port 1
68 Carburetor Gasket 1
69 Carburetor Assy 1
70 Choke Switch 1
71 Washer 1
72 Nut (M4) 1
73 Air Cleaner Case 1
74 Bolt (M5 x 50) 2
75 Recoil Starter 1
76 Choke 1
77 Self Tapping Bolt (ST42 x 12) 1
78 Air Filter 1
79 Air Filter Cover 1
80 Label 1
81 Head Cover Bolt 1
82 Fuel Tank Strut 1
83 Latex Cover 1
84 Fuel Filter 1
85 Fuel Line 1
86 Fuel Line Plug 1
87 Fuel Line 1
88 Bolt (M5 x 20) 2
89 Fuel Tank 1
90 Packing Ring 1
91 Intake Strut 1
92 Intake 1
93 Fuel Cap 1
94 Fuel Tank Cap w/lter 1
95 Primer 1
96 Throttle 1

Page 16For technical questions, please call 1-800-444-3353.SKU 66585
96
ASSEMBLY DIAGRAM - ENGINE

Page 17For technical questions, please call 1-800-444-3353.SKU 66585
LIMITED 1 YEAR / 90 DAY
WARRANTY
Harbor Freight Tools Co. makes every
effort to assure that its products meet high
quality and durability standards, and warrants
to the original purchaser that for a period
of ninety days from date of purchase that
the engine/motor, the belts (if so equipped),
and the blades (if so equipped) are free
of defects in materials and workmanship.
Harbor Freight Tools also warrants to the
original purchaser, for a period of one year
from date of purchase, that all other parts
and components of the product are free from
defects in materials and workmanship (90
days if used by a professional contractor or
if used as rental equipment). This warranty
does not apply to damage due directly or
indirectly, to misuse, abuse, negligence or
accidents, repairs or alterations outside
our facilities, normal wear and tear, or to
lack of maintenance. We shall in no event
be liable for death, injuries to persons
or property, or for incidental, contingent,
special or consequential damages arising
from the use of our product. Some states
do not allow the exclusion or limitation of
incidental or consequential damages, so the
above limitation of exclusion may not apply
to you. THIS WARRANTY IS EXPRESSLY
IN LIEU OF ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND
FITNESS.
To take advantage of this warranty,
the product or part must be returned to us
with transportation charges prepaid. Proof
of purchase date and an explanation of the
complaint must accompany the merchandise.
If our inspection veries the defect, we
will either repair or replace the product at
our election or we may elect to refund the
purchase price if we cannot readily and
quickly provide you with a replacement. We
will return repaired products at our expense,
but if we determine there is no defect, or that
the defect resulted from causes not within the
scope of our warranty, then you must bear the
cost of returning the product.
This warranty gives you specic legal
rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 •
Camarillo, CA 93011 • [phone]
EMISSION CONTROL SYSTEM
WARRANTY
United States Emission Control Defects Warranty
Statement
The United States Environmental Protection Agency (herein
EPA) and Harbor Freight Tools (herein HFT) are pleased to explain the
emission control system warranty on your 1997 and later Small Off-
Road Engine (herein engine). Within the United States, new off-road,
spark-ignition engines certied for model year 1997 and later, must be
designed, built and equipped to meet the stringent anti-smog standards
set forth by the EPA. HFT must warrant the emission control system on
your engine for the periods of time described below, provided there has
been no abuse, neglect or improper maintenance of your engine.
Your emission control system may include parts such as the carbu-
retor or fuel-injection system, and the ignition system.Also included may
be hoses, belts, connectors and other emission-related assemblies.
Where a warrantable condition exists, HFT will repair your engine
at no cost to you including diagnosis, parts and labor.
Manufacturer’s Warranty Coverage
The 1997 and later engines are warranted for two (2) years. If
any emission-related part on your engine is defective, the part will be
repaired or replaced by HFT.
Harbor Freight Tools Emission Control Defects
Warranty Coverage
Engines are warranted for a period of two (2) years relative to
emission control parts defects, subject to the provisions set forth below.
If any emission related part on your engine is defective, the part will be
repaired or replaced by HFT.
Owner’s Warranty Responsibilities
As the engine owner, you are responsible for the performance•
of the required maintenance listed in your Owner’s Manual. HFT
recommends that you retain all receipts covering maintenance
on your engine, but HFT cannot deny warranty solely for the lack
of receipts or for your failure to ensure the performance of all
scheduled maintenance.
As the engine owner, you should, however, be aware that HFT•
may deny you warranty coverage if your engine or a part has
failed due to abuse, neglect, improper maintenance, or unap-
proved modications.
You are responsible for shipping your engine to a HFT warranty•
station as soon as a problem exists. Contact the HFT Customer

Page 18For technical questions, please call 1-800-444-3353.SKU 66585
Service department at the number below to make shipping arrange-
ments. The warranty repairs should be completed in a reasonable
amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights and
responsibilities, you should contact the Harbor Freight Tools Customer
Service Department at 1-800-444-3353.
Harbor Freight Tools Emission Control Defects
Warranty Provisions
1. Length of Coverage
HFT warrants to a rst retail purchaser and each subsequent
purchaser that the engine is free from defects in materials and
workmanship that cause the failure of warranted parts for a
period of two (2) years after the date of delivery to the rst retail
purchaser.
2. No Charge Repair or Replacement
Repair or replacement of any warranted part will be performed at
no charge to the owner if the work is performed through a warranty
station authorized by HFT. For emissions warranty service, contact
the HFT Customer Service Department at 1-800-444-3353.
3. Consequential Damages Coverage
Coverage under this warranty shall also extend to the failure of
any engine components caused by the failure of any warranted
part while it is still covered under this warranty.
4. Coverage Exclusions
Warranty claims shall be led in accordance with the provisions
of the HFT warranty policy explained in the box at the top of the
previous page. HFT shall not be liable for any loss of use of the
engine, for any alternative usage, for any damage to goods, loss of
time, or inconvenience. Warranty coverage shall also be excluded
for any part which fails, malfunctions, or is damaged due to failure
to follow the maintenance and operating instructions set forth in
the Owner’s Manual including, but not limited to:
Use of parts which are not authorized by HFTa)
Improper installation, adjustment or repair of the engine orb)
of any warranted part unless performed by an authorized
warranty center
Failure to follow recommendations on fuel use contained inc)
the Owner’s Manual
Improper or inadequate maintenance of any warrantedd)
parts
Repairs performed outside of the authorized warranty servicee)
dealers
Alterations by changing, adding to or removing parts fromf)
the engine.
5. Service and Maintenance
Component parts which are not scheduled for replacement as
required maintenance or are scheduled only for regular inspection
to the effect of “repair or replace as necessary” are warranted for
the warranty period. Any warranted part which is scheduled for
replacement as required maintenance is warranted for the period
of time up to the rst scheduled replacement point for that part.
Any replacement part, provided it is equivalent in durability and
performance, may be used in performance of maintenance or
repairs. The owner is responsible for commissioning a qualied
technician/mechanic to perform all required maintenance, as
outlined in the Inspection, Cleaning, and Maintenance section in
this manual.
6. Warranted Parts
1) Fuel Metering System
Carburetor and its internal parts.i)
Fuel pump (if so equipped).ii)
Cold start enrichment system.iii)
2) Air Induction System
Intake pipe/manifold.i)
Air cleaner.ii)
3) Ignition System
Spark plug.i)
Magneto ignition system.ii)
4) Catalyst System (if so equipped)
Exhaust pipe stud.i)
Mufer.ii)
Catalytic converter (if so equipped).iii)
5) Miscellaneous Items Used in Above Systems
Vacuum, temperature and time sensitive valves andi)
switches.
Hoses, belts, connectors, and assemblies.i)