Pacific hydrostar 65351 Parts list manual

2” HIGH PRESSURE
CLEAR WATER PUMP
With 6.5 HP Gas Engine - CARB/EPA
Model 65351
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 10c; 10b; 09j
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 2 For technical questions, please call 1-800-444-3353. SKU 65351
SPECIFICATIONS
Suction Port Diameter 2” TPI
Discharge Port Diameter 2” TPI
Maximum Suction Head 25 ft.
Total Head 187 ft.
Maximum Discharge
Capacity 108 GPM
Pump Type Centrifugal / Self-Priming*
Pump RPM 3600
Engine Specications
6.5 HP, OHV / 4-Stroke /
Recoil Start / 3 hr. Run-Time
Displacement: 196cc
Rotation: Counterclockwise
(from shaft side)
Unleaded Fuel: Min. 87 Octane
Fuel Tank Capacity: 1 Gallon
Engine Oil Capacity: 27 Oz.
Included
Accessories
Plastic Basket Filter
Hose Coupling
Hose Adapters / Barbed Fittings
/ Gasket / Wire Clamps
* The Water Pump is self-priming. However, for initial use

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 and by the California Air
Resources Board (also known as CARB).
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 •
Cofferdams •
Quarries •
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 •
** Non Potable Only
N/A = Not Applicable

Page 3For technical questions, please call 1-800-444-3353.SKU 65351
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

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
Gasoline fuel and fumes are ammable, 1.
and 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 gasoline containing more7.
than 10% ethanol (E10). Do not use E85
ethanol.

Page 4 For technical questions, please call 1-800-444-3353. SKU 65351
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.
Gasoline-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 65351
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:
a.
“OFF” position.
NOTE: When ordering or referencing




ordering replacement parts.
Allow the engine to completely cool.b.
c.
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.

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

Page 6 For technical questions, please call 1-800-444-3353. SKU 65351
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.
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.
DIPSTICK

POWER SWITCH

OIL DRAIN PLUG

STARTER
HANDLE

AIR

CHOKE

FUEL
LEVER

THROTTLE


FUEL TANK

MUFFLER

WATER
PRIMER
PLUG



WATER
DRAIN
PLUG



CONTROLS AND FEATURES
COUPLING
GASKET

HOSE
COUPLING

INTAKE
FILTER

INTAKE
FILTER

HOSE
CLAMPS

HOSE


Page 7For technical questions, please call 1-800-444-3353.SKU 65351
CONNECTING HOSES

MUST be reinforced with braided material
or have non-collapsible construction. Do
not use Hose with inside diameter smaller
than 2” (pump’s Intake Flange (3) diameter).
Slide Hose Coupler (35) over Hose1.
Coupling (34). Insert Coupling Gasket
(38) into end of Hose Coupler. See
Figure 2, below.
Screw Hose Coupler (35) clockwise onto2.
Intake Flange (3) until fastened securely.
See Figure 3, below.
Slide Hose Clamp (39) 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 (37). Use a screwdriver to tighten
Hose Clamp until secure. See Figure 5.
For the Discharge Hose (not included),5.
slide the other Hose Coupler (35) over
the other Hose Coupling (34). Insert the
other Coupling Gasket (38) into the end
of Hose Coupler.
Thread the Hose Coupler (35) clockwise6.
onto Discharge Flange (33) until
tightened securely. See Figure 6.
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
 
COUPLING

INTAKE FLANGE

HOSE
COUPLER

Figure 3
HOSE COUPLER

HOSE CLAMP

SUCTION HOSE

Figure 4
HOSE CLAMP

SUCTION
HOSE

INTAKE
FILTER

Figure 5
HOSE CLAMP

DISCHARGE
HOSE

HOSE COUPLER

DISCHARGE
FLANGE

Figure 6

Page 8 For technical questions, please call 1-800-444-3353. SKU 65351
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 65351
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

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.
OPERATING INSTRUCTIONS
Read the ENTIRE IMPORTANT
SAFETY INFORMATION
section at the beginning of this
manual including all text under
subheadings therein before set up
or use of this product.
Starting the Engine
Inspect Engine and Water Pump
for damaged, loose, and missing
parts before set up and starting.
If any problems are found, do not
use until properly repaired.
Checking and Filling Engine Oil:
IMPORTANT! Your Warranty is voided1.
if you do not put engine oil in the

use. Before each use, check the oil
level. Never run the Engine with low or
no engine oil. Running the Engine with
no or low engine oil WILL permanently
damage the Engine.
The Engine MUST be lled with a high 2.
quality grade engine oil. If the Engine
will be run in temperatures above 32°
Fahrenheit, use SAE 30 weight oil. If
the Engine will be run in temperatures
below 32° Fahrenheit, use SAE 5W-30
weight oil.
To add engine oil, unscrew and remove3.
the Oil Dipstick (8C). Pour engine oil
into the Dipstick Reservoir until the level
of oil is even with the bottom edge of the
Dipstick Receptacle. Then, make sure
to screw the Oil Dipstick back into its
Dipstick Hole. See Figure D, below.
CAUTION! Do not run Engine with too little or
too much oil. Engine will be permanently
damaged.

Figure D
LOW OIL LEVEL
FULL OIL LEVEL

Page 10 For technical questions, please call 1-800-444-3353. SKU 65351
Checking and Filling Fuel:
Check the fuel level.1.
WARNING! TO PREVENT

Fill the Fuel Tank (11H) in a well-
ventilated area away from ignition
sources. Do not smoke.
To ll the Fuel Tank (11H), rst wipe 2.
off the Fuel Filler Cap (9H) and the
surrounding area.
FIGURE E
FUEL
FILLER
CAP


3. Unscrew, and remove the Fuel Filler Cap
(9H). 
Remove Filter Cup (7H) and remove any4.
dirt and debris. Then replace Filter Cup.

Fill the Fuel Tank (11H) to about 1 inch5.
under the ll neck of the Tank with
unleaded gasoline.
Then replace the Fuel Filler Cap (9H).6.
Start Procedure:
Before starting the Engine:
Follow the Assembly Instructions toa.
prepare the equipment.
Inspect the equipment and Engine.b.
Fill the Engine with the properc.
amount and type of fuel and oil.
Note: This engine includes an automatic low
oil shutdown sensor that disables the
engine if the oil level is too low.
Unscrew and remove the Waterd.
Primer Plug (8). Fill the Front
Case (31) with clean water. Then
replace the Water Primer Plug.

FIGURE F


1. Turn the Engine Choke Lever (22G) to its
“CHOKE” position. Set the Choke Lever
in the “RUN” position when starting a
warm Engine. 
Then turn the Engine Power Switch (6K)2.
on. 
FIGURE G
POWER


Page 11For technical questions, please call 1-800-444-3353.SKU 65351
FIGURE H
STARTER
HANDLE

3. Grasp the Starter Handle (16K), and
pull slowly until resistance is felt. While
holding the Handle, allow the Starter
Rope to rewind slowly. Then, pull the
Starter Handle with a rapid, full arm
stroke. Once again while holding the
Handle, allow the Rope to rewind slowly.
Repeat as necessary, until the Engine
starts. 
After the Engine starts and warms up,4.
slowly move the Choke Lever (22G) to
its “RUN” position. 
To adjust the Engine’s speed, move5.
the Engine Throttle (23G) to the left for
increased speed. Move the Throttle to
the right for decreased speed.

IMPORTANT: Allow the Engine to run6.
at no load until warm (1-5 minutes) and
with no load after each start-up to allow
the Engine to stabilize.
Break-in Period:
Breaking-in the Engine will help toa.
ensure proper equipment and operation,
and will extend the Engine’s lifespan.
The warranty is void if the Engine is not
broken in properly. The rst 20 hours of
operation is the break-in period.
During the rst 3 hours of use:b.
Do not apply a heavy load to•
equipment.
Do not operate the Engine at its•
maximum speed.
After the rst 20 hours of use:c.
Change the engine oil.•
Under normal operating conditions
subsequent maintenance follows the
schedule explained in MAINTENANCE
AND SERVICING section.
Once Engine starts, the Water Pump will7.
run continuously until Engine is turned
off. To turn off the Engine, turn the
Power Switch (6K) off. 
IMPORTANT:8. If the machine’s Impeller
strikes a foreign object, or if the machine
begins making an unusual noise or
vibrates excessively, immediately shut
off the Engine. Allow the Impeller to
come to a complete stop. Remove the
Spark Plug (10D) from the Engine. Then
perform the following steps:
Clear the obstruction.a.
Inspect for damage.b.
Repair or replace damaged parts.c.
Check for any loose parts and tighten tod.
ensure continued safe operation.
Do not leave the Water Pump9.
unattended when it is running. Turn off
the Engine before leaving the work area.
When nished, turn the Engine’s Power 10.
Switch (6K) off. Wait until the Water
Pump completely stops. Allow the
Engine to completely cool before moving
or storing the Water Pump.

Page 12 For technical questions, please call 1-800-444-3353. SKU 65351
MAINTENANCE AND
SERVICING
TO PREVENT

FROM ACCIDENTAL STARTING:
Turn the Power Switch of the
Engine to its “OFF” position, wait
for the Engine to cool, and

before performing any
inspection, maintenance, or
cleaning procedures.
TO PREVENT

FROM EQUIPMENT FAILURE:
Do not use damaged equipment.
If abnormal noise, vibration, or
excess smoking occurs, correct
problem before further use.
Maintenance Procedures
Many maintenance procedures,
including those not detailed in this
manual, will need to be performed

safety. If you have any doubts
about your ability to safely service
the equipment or Engine, have a

equipment instead.
Note: Warranty is void if proper maintenance
and servicing procedures are not
followed.
Engine Oil Change:
CAUTION! Oil is very hot during operation
and can cause burns. Wait for Engine to
cool before changing oil.
Place a drain pan (not included)1.
underneath the crankcase’s Drain Plug
(1B). 
Remove the Drain Plug (1B) and, if2.
possible, tilt the Crankcase (5B) slightly
to help drain the oil out. Recycle used
oil. 
Replace the Drain Plug (1B) and gasket3.
and tighten it. 
Rell the oil to the proper level following 4.
the instructions under the “Starting the
Engine” section.
Air Filter Element Maintenance:
Wipe off the Air Cleaner Cover (2I).1.
The Air Cleaner Cover is held in place by2.
the Air Cleaner Base (8I). Remove it.
Remove the Air Filter Element (3I).3.
Wash the Air Filter Element in warm4.
water and mild detergent several times.
Rinse. Squeeze out excess water and
allow it to dry completely. Soak the Filter
in lightweight oil briey, then squeeze out
the excess oil.
Install the new Air Filter Element or the5.
cleaned Filter. Secure the Air Cleaner
Cover before use.
Spark Plug Maintenance:
Disconnect Spark Plug Wire from end1.
of plug. Clean out debris from around
Spark Plug (10D).
Using a spark plug wrench, remove the2.
Spark Plug.
Inspect the Spark Plug:3.
If electrode is oily, clean it using a clean,
dry rag. If electrode has deposits on
it, polish it using emery paper. If white
insulator is cracked or chipped, Spark
Plug needs to be replaced.

Page 13For technical questions, please call 1-800-444-3353.SKU 65351
When installing a new Spark Plug, adjust4.
Plug’s gap to the specication on the
Technical specication chart. Do not pry
against the electrode or the insulator; the
Spark Plug can be damaged.
Install the new Spark Plug or the cleaned5.
Spark Plug into the Engine. Gasket-
style: Finger-tighten until the gasket
contacts the cylinder head, then about
1/2-2/3 turn more.
Non-gasket-style: Finger-tighten until
plug contacts head, then 1/16 turn more.
Cleaning, Maintenance, and
Lubrication Schedule: Engine
Note: This maintenance schedule is
intended solely as a general guide. If
performance decreases or if the Engine
operates unusually, check systems
immediately. The maintenance needs
this Engine will differ depending on
factors such as temperature, air quality,
fuel quality, and other factors.
Note: These procedures are in addition
to regular checks and maintenance
explained as part of the regular operation
of the Engine.
After Initial 20 Operation Hours:
Change engine oil.a.
Every 25 Operation Hours Thereafter:
Clean/replace Air Filter Element.a.
Inspect/clean Spark Plug.b.
Every 50 Operation Hours:
Change engine oil.a.
Every 100 Operation Hours:
Replace Spark Plug.a.
Replace Air Filter Element.b.
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 (11H) and Carburetora.
Assembly (28G).
Clean carbon build-up from Combustionb.
Chamber.
Storage
Once Engine cools, wipe with cloth.1.
When the equipment is to remain idle for2.
longer than 20 days, prepare the Engine
for storage as follows:
Change engine oil and empty Fuel Tank.a.
Clean out area around Spark Plug.b.
Remove Spark Plug and pour one
tablespoon of engine oil into Cylinder
through Spark Plug hole.
Reinstall Spark Plug, but leave thec.
Spark Plug Wire disconnected.
Pull Starter Handle (16K) to distributed.
oil in Cylinder. Stop after one or two
revolutions when you feel the Piston
start the compression stroke (when you
start to feel resistance).
Apply a thin coat of rust preventive oil to3.
all uncoated metal parts.
Cover and store in a dry, well-ventilated4.
area out of reach of children.
Maintenance and Cleaning
Schedule: Water Pump
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 this machine will differ depending on

Page 14 For technical questions, please call 1-800-444-3353. SKU 65351
factors such as working environment,
frequency of use, and other factors.
Note: These procedures are in addition to
the regular checks and maintenance
explained as part of the regular operation
of the machine.
Before Every Use:
Check the Filter on the Intake Hose fora.
accumulated debris, rocks, and other
objects that may clog the Filter.
Check to make sure all hoseb.
connections are secure.
Check to make sure there is waterc.

enough water, unscrew Primer Plug

Note: If the Water Pump is not in use due to
dry conditions, etc., prime Front Case
and activate the unit once every month.
In Cold Weather:
When the Water Pump is not in use,a.
protect the interior of the Pump from
freezing by draining any remaining
water from the Front Case and pumping
a permanent type automotive anti-
freeze containing a rust inhibitor through
the system. Make sure to ush the
system with a neutralizing liquid prior to
re-use of the Water Pump.
When Cleaning:
Use water and a mild detergent to cleana.
exterior parts of Pump. Do not use
solvents or introduce water into ports.
Use compressed air to blow out debrisb.
from the exterior parts of the Engine.
When Storing:
Store the Water Pump in a clean, dry,c.
safe location out of reach of children
and other unauthorized persons.

Page 15For technical questions, please call 1-800-444-3353.SKU 65351
Troubleshooting
Problem Possible Causes Probable Solutions
Engine will
not start
ENGINE RELATED:
Low oil level.
ENGINE RELATED:
Fill oil to proper level. Check engine before EVERY use.
FUEL RELATED:
No fuel in tank.1.
Choke not in start position, especially2.
with cold engine.
Low quality or deteriorated, old3.
gasoline.
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 is cold.2.
Use only fresh 87+ octane unleaded gasoline.3.
Prime carburetor by pressing priming bulb specied 4.
number of times (if equipped).
Clean out passageways using fuel additive. Heavy5.
deposits may require further cleaning.
Gently6. tap side of carburetor oat chamber with
screwdriver handle.
Turn choke to run position. Remove spark plug7.
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 connected1.
securely.
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 ignition 5.
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 damaged3.
head gasket. (Hissing noise will occur
when trying to start.)
Engine valves or tappets mis-adjusted4.
or stuck.
COMPRESSION RELATED:
Pour tablespoon of oil into spark plug hole. Crank1.
engine a few times and try to start again.
Tighten spark plug. If that does not work, replace2.
spark plug. If problem persists, may have head
gasket problem, see #3.
Tighten head. If that does not remedy problem,3.
replace head gasket.
Adjust valve clearance. If that does not work, clean4.
or replace valves/tappets.
Engine

Spark plug wire loose.1.
Incorrect spark plug gap or damaged2.
spark plug.
Defective spark plug wire.3.
Old or low quality gasoline.4.
Incorrect compression.5.
Check wire connections.1.
Re-gap or replace spark plug.2.
Replace spark plug wire.3.
Use only fresh 87 octane unleaded gasoline.4.
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 16 For technical questions, please call 1-800-444-3353. SKU 65351
Troubleshooting
Problem Possible Causes Probable Solutions
Engine stops
suddenly
Low oil shutdown.1.
Fuel tank empty or full of impure or low2.
quality gasoline.
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.
gasoline.
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 gasoline.1.
Engine overloaded.2.
Incorrect spark timing, deposit buildup,3.
worn engine, or other mechanical
problems.
Fill fuel tank with fresh 87+ octane unleaded1.
gasoline.
Do not exceed equipment’s load rating.2.
Have qualied technician diagnose and 3.
service engine.
Engine

Impure or low quality gasoline.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.
gasoline.
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 (not included) 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 lter 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 1-1/2” 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 17For technical questions, please call 1-800-444-3353.SKU 65351
PARTS LISTS AND ASSEMBLY DIAGRAMS
Water Pump Diagram
Part # Description Qty. Part # Description Qty. Part # Description Qty.
1 Bolt (M8 x 25) 10 14 O-Ring 1 27 Nut (M10) 6
2 Washer (M8) 10 15 Bolt (M10 x 25) 1 28 Mechanical Seal 1
3 Intake Flange (2”) 1 16 Spring Washer (M10) 1 29 Stud Shaft 1
4 Screw (M6 x 12) 1 17 Wide Washer 1 30 Key (4 x 35) 1
5 Washer 1 18 Primary Impeller 1 31 Front Case 1
6 Non-Return Flap 1 19 Fluted Flange 1 32 Manifold Gasket 1
7 Non-Return Weight 1 20 Secondary Impeller 1 33 Discharge Flange (2”) 1
8 Primer Plug 2 21 Bolt (M8 x 40) 4 34 House Coupling 2
9 O-Ring 2 22 Washer (M8) 4 35 House Coupler 2
10 Bolt (M10 x 40) 6 23 O-Ring 4 36 Intake Filter Cover 1
11 Washer 12 24 O-Ring 1 37 Intake Filter 1
12 Gasket 1 25 Rear Housing 1 38 Coupling Gasket 2
13 Primary Impeller Cover 1 26 Spring Washer (M10) 6 39 House Clamps 4
33
38
34

36
39
35

Page 18 For technical questions, please call 1-800-444-3353. SKU 65351
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM IN THIS MANUAL AS
A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY
OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE
IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY
STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS,
AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE
ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT
PARTS THERETO.
Frame-Parts List and Diagram A
IMPORTANT NOTE:
When ordering frame parts, indicate the part name and part number with the sufx A.

Part # Description Qty. Part # Description Qty.
1A 3” Frame Sub-Assembly 1 4A Bolt (M6 x 12) 4
2A Nut (M6) 4 5A Nut (M8) 4
3A Rubber Foot 4 6A Bolt (M8 x 32) 4
4A
2A
3A
4A
2A
3A
1A
6A
3A
2A
4A
2A
3A
6A
6A
4A
5A
5A 5A
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.

Page 19For technical questions, please call 1-800-444-3353.SKU 65351
Crankcase - Parts List and Assembly Diagram B
Part # Description Qty. Part # Description Qty.
1B Drain Plug 2 11B Bolt (M6 x 14) 2
2B Washer 2 12B Governing Shaft 1
3B Bearing (6205) 1 13B Driven Gear Washer 1
4B Crankshaft Oil Seal 1 14B Fly Weight Pin 2
5B Crankcase 1 15B Governor Driven Gear 1
6B Sway Bar 1 16B Governor Fly Weight 2
7B Washer 1 17B Governor Driven Gear Sub-Assy. 1
8B Keeper 1 18B Snap Ring 1
9B Nut (M10) 1 19B Washer 1
10B Oil Sensor 1 20B Sliding Sleeve 1
IMPORTANT NOTE:
When ordering engine parts, indicate the part name and part number with the sufx B.

1B
2B
2B
4B
1B
5B
6B
3B
8B
 12B
9B
10B
11B
11B

13B
14B
15B
16B
16B
14B
20B
19B
18B

Page 20 For technical questions, please call 1-800-444-3353. SKU 65351
Crankcase Cover - Parts List and Assembly Diagram C
IMPORTANT NOTE:
When ordering engine parts, indicate the part name and part number with the sufx C.

Part # Description Qty. Part # Description Qty.
1C Oil Plug Sub-Assy. 1 7C Set Pin 2
2C Oil Plug 1 8C Dipstick 1
3C Oil Plug Seal 2 9C Dipstick Sub-Assy. 1
4C Crankcase Cover 1 10C Crankshaft Oil Seal 1
5C Bearing (6205) 1 11C Bolt (M8 x 32) 7
6C Crankcase Gasket 1
1C
2C 3C
4C
5C
6C


8C
3C
9C
10C
11C
11C
11C
11C
11C 11C 11C