Briggs & Stratton 73001 User manual

073001
073002
073003
Owner’s Manual
Manuel de l'utilisateur
Manual del Propietario
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BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC
JEFFERSON,WISCONSIN, U.S.A. Manual No. 197988GS
Revision 1 (08/17/2005)
Before using this product, read this
manual and follow all Safety Rules and
Operating Instructions.
CAUTION

2
SAFETY RULES
TABLE OF CONTENTS
Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Know Your Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-14
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-16
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-20
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Emission Control Warranty. . . . . . . . . . . . . . . . . . . . . 23-24
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
EQUIPMENT
DESCRIPTION
Read this manual carefully and become
familiar with your water pump. Know its
applications, its limitations and any hazards
involved.
This water pump can be used in light construction or in an
emergency to transfer water from a flooded or unwanted
location such as a basement. It can also be used for draining
swimming pools or for watering a lawn or garden.
Every effort has been made to ensure that information in
this manual is accurate and current. However, we reserve
the right to change, alter or otherwise improve the product
and this document at any time without prior notice.
The Emissions Control System for this water pump is
warranted for standards set by the Environmental
Protection Agency and the California Air Resources Board.
SAFETY RULES
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.
The safety alert symbol ( ) is used with a signal word
(DANGER, CAUTION,WARNING), a pictorial and/or a
safety message to alert you to hazards. DANGER indicates
a hazard which, if not avoided, will result in death or serious
injury. WARNING indicates a hazard which, if not avoided,
could result in death or serious injury. CAUTION
indicates a hazard which, if not avoided, might result in
minor or moderate injury. CAUTION, when used
without the alert symbol, indicates a situation that could
result in equipment damage. Follow safety messages to
avoid or reduce the risk of injury or death.
Hazard Symbols and Meanings
The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
WARNING
Fire
Explosion
Toxic Fumes
Hot Surface
Electrical Shock
Kickback
Copyright © 2005 Briggs & Stratton Power Products
Group, LLC. All rights reserved. No part of this material
may be reproduced or transmitted in any form by any
means without the express written permission of Briggs &
Stratton Power Products Group, LLC.
SAVE THESE INSTRUCTIONS
Moving Parts
These water pumps are manufactured to pump ONLY
clear water that is not intended for human consumption.
CAUTION

3
SAFETY RULES
WHEN ADDING OR DRAINING FUEL
• Turn water pump OFF and let it cool at least 2 minutes
before removing fuel cap. Loosen cap slowly to relieve
pressure in tank.
• Fill or drain fuel tank outdoors.
• DO NOT overfill tank.Allow space for fuel expansion.
• Keep fuel away from sparks, open flames, pilot lights, heat, and
other ignition sources.
• DO NOT light a cigarette or smoke.
WHEN STARTING EQUIPMENT
• Ensure spark plug, muffler, fuel cap and air cleaner are in place.
• DO NOT crank engine with spark plug removed.
• If fuel spills, wait until it evaporates before starting engine.
WHEN OPERATING EQUIPMENT
• DO NOT pump flammable liquids, such as fuel or fuel oils.
• This water pump is not for use in mobile equipment or
marine applications.
• DO NOT tip engine or equipment at angle which causes fuel
to spill.
• Secure water pump. Loads from hoses may cause tipover.
• DO NOT stop engine by moving choke lever to “Choke”
position.
WHEN TRANSPORTING OR REPAIRING
EQUIPMENT
• Transport/repair with fuel tank EMPTY or with fuel shutoff
valve OFF.
• Disconnect spark plug wire.
WHEN STORING FUEL OR EQUIPMENT WITH FUEL
IN TANK
• Store away from furnaces, stoves, water heaters, clothes
dryers or other appliances that have pilot light or other
ignition source because they can ignite fuel vapors.
Fuel and its vapors are extremely flammable and
explosive.
Fire or explosion can cause severe burns or
death.
WARNING
• When starting engine, pull cord slowly until resistance is felt
and then pull rapidly to avoid kickback.
• Secure discharge hose to avoid whipping.
Rapid retraction of starter cord (kickback) will
pull hand and arm toward engine faster than
you can let go.
Broken bones, fractures, bruises or sprains could
result.
Keep hands and body clear from discharge of
pump.
WARNING
WHEN ADJUSTING OR MAKING REPAIRS TO YOUR
WATER PUMP
• Disconnect the spark plug wire from the spark plug and place
the wire where it cannot contact spark plug.
WHEN TESTING FOR ENGINE SPARK
• Use approved spark plug tester.
• DO NOT check for spark with spark plug removed.
Unintentional sparking can result in fire or
electric shock.
WARNING
• Operate water pump ONLY outdoors.
• Keep exhaust gas from entering a confined area through
windows, doors, ventilation intakes or other openings.
• DO NOT operate water pump inside any building, confined
area or enclosure, such as basements, garages or a similar
location, even if doors or windows are open.
Running water pump gives off carbon monoxide,
an odorless, colorless, poison gas.
Breathing carbon monoxide can cause nausea,
fainting or death.
WARNING

SAFETY RULES
4
• DO NOT tamper with governed speed.
• DO NOT modify water pump in any way.
• DO NOT allow unqualified persons or children to operate or
service water pump.
Excessively high operating speeds increase risk of injury
and damage to water pump.
Excessively low speeds impose a heavy load.
CAUTION
• Be sure pump chamber is filled with water before starting the
engine. NEVER run pump without priming.
• Use a non-collapsible hose on the suction side of pump.
• Use water pump only for intended uses.
• If you have questions about intended use, ask dealer or call
1-800-743-4115.
• Pumping sea water, beverages, acids, chemical solutions, or any
other liquid that promotes corrosion can damage the pump.
• Ensure all connections are air tight.
• DO NOT obstruct the suction or discharge hose in any way.
• NEVER operate pump without strainer basket connected to
end of suction hose.
• DO NOT exceed suction head maximum of 8m (25 ft.) and
total head of 32m (106 ft.). Use shortest suction head possible
(see page 11).
• NEVER allow vehicles to drive over hoses. If a hose must be
positioned across a roadway, use planking on each side of hose
to allow vehicles to pass over without obstructing or
collapsing hose.
• Anchor pump to avoid “walking” or equipment movement,
especially if located near a ditch or edge of open ravine.The
equipment could fall in.
• Keep equipment away from edge of river or lake where it
could cause the bank to collapse.
• DO NOT insert any objects through cooling slots.
Improper treatment of water pump can damage it and
shorten its life.
CAUTION
• NEVER place hands or body parts inside of running pump or
hoses.
• DO NOT wear loose clothing, jewelry or anything that may
be caught in the starter or other rotating parts.
• Tie up long hair and remove jewelry.
Starter and other rotating parts can entangle
hands, hair, clothing, or accessories.
WARNING
• DO NOT touch hot surfaces and avoid hot exhaust gases.
• Allow equipment to cool before touching.
• The water pump must be at least 5 feet from structures
having combustible walls and/or other combustible materials.
• Keep at least 3 feet of clearance on all sides of water pump
for adequate cooling, maintenance and servicing.
• Reflective exhaust heat may damage fuel tank causing fire.
• Code of Federal Regulation (CFR) Title 36 Parks, Forests, and
Public Property require equipment powered by an internal
combustion engine to have a spark arrester, maintained in
effective working order, complying to USDA Forest service
standard 5100-1C or later revision. In the State of California a
spark arrester is required under section 4442 of the California
Public resources code. Other states may have similar laws.
Running engines produce heat.Temperature of
muffler and nearby areas can reach or exceed
150°F (65°C).
Severe burns can occur on contact.
Combustible debris, such as leaves, grass, brush,
etc. can catch fire.
WARNING

KNOWYOUR WATER PUMP
5
KNOWYOUR WATER PUMP - MODEL 073001
Read this owner’s manual and safety rules before operating your water pump.
Compare the illustrations with your water pump, to familiarize yourself with the locations of various controls and
adjustments. Save this manual for future reference.
Air Cleaner — Protects engine by filtering dust and
debris out of intake air.
Choke Lever — Used when starting a cold engine.
Discharge Outlet — Connect discharge hose here.
Engine Information (not shown) — Stamped on valve
cover. Provides model, type and trim number of engine.
Please have these readily available when calling for
assistance.
Fuel Shutoff Valve — Used to turn fuel supply on and
off to engine.
Fuel Tank — Capacity of one (1) U.S. gallons.
Oil Fill Cap — Check and fill engine with oil here.
On/Off Switch — Set this switch to "On" before using
starter handle. Set switch to "Off" to switch off engine.
Priming Plug — Fill pump with water here to prime
pump before starting.
Pump Chamber — Be sure to fill with water before
starting.
Serial Number Label — Provides model, revision and
serial number of water pump. Please have these readily
available when calling for assistance.
Starter Handle — Used to start the engine.
Strainer Basket (not shown) — Used to limit passage
of abrasive materials into the pump.
Suction Inlet — Connect reinforced suction hose here.
Engine Speed Lever — Used to adjust engine speed to
control pump output.
Water Drain Plug — Remove to drain water from pump
and flush internal components with clean water.
Fuel Tank
Air Cleaner
On/Off Switch
Water Drain Plug
Choke Lever
Starter Handle
Priming Plug
Oil Fill Cap
Discharge Outlet
Serial Number Label
Suction Inlet
Fuel Shutoff Valve
Engine Speed Lever
Pump Chamber

KNOWYOUR WATER PUMP
6
KNOWYOUR WATER PUMP - MODEL 073002
Read this owner’s manual and safety rules before operating your water pump.
Compare the illustrations with your water pump, to familiarize yourself with the locations of various controls and
adjustments. Save this manual for future reference.
Air Cleaner — Protects engine by filtering dust and
debris out of intake air.
Choke Lever — Used when starting a cold engine.
Discharge Outlet — Connect discharge hose here.
Engine Information (not shown) — Stamped on valve
cover. Provides model, type and trim number of engine.
Please have these readily available when calling for
assistance.
Fuel Shutoff Valve — Used to turn fuel supply on and
off to engine.
Fuel Tank — Capacity of one (1) U.S. gallons.
Oil Fill Cap — Check and fill engine with oil here.
On/Off Switch — Set this switch to "On" before using
recoil starter. Set switch to "Off" to switch off engine.
Priming Plug — Fill pump with water here to prime
pump before starting.
Pump Chamber — Be sure to fill with water before
starting.
Serial Number Label — Provides model, revision and
serial number of water pump. Please have these readily
available when calling for assistance.
Starter Handle — Used to start the engine.
Strainer Basket (not shown) — Used to limit passage
of abrasive materials into the pump.
Suction Inlet — Connect reinforced suction hose here.
Engine Speed Lever — Used to adjust engine speed to
control pump output.
Water Drain Plug — Remove to drain water from pump
and flush internal components with clean water.
Fuel Tank
Air Cleaner
On/Off Switch
Water Drain Plug
Choke Lever
Starter Handle
Priming Plug
Oil Fill Cap
Discharge Outlet
Serial Number Label Suction Inlet
Fuel Shutoff Valve
Engine Speed
Lever
Pump Chamber

KNOWYOUR WATER PUMP
7
KNOWYOUR WATER PUMP - MODEL 073003
Read this owner’s manual and safety rules before operating your water pump.
Compare the illustrations with your water pump, to familiarize yourself with the locations of various controls and
adjustments. Save this manual for future reference.
Air Cleaner — Protects engine by filtering dust and
debris out of intake air.
Choke Lever — Used when starting a cold engine.
Discharge Outlet — Connect discharge hose here.
Engine Information (not shown) — Stamped on valve
cover. Provides model, type and trim number of engine.
Please have these readily available when calling for
assistance.
Fuel Shutoff Valve — Used to turn fuel supply on and
off to engine.
Fuel Tank — Capacity of one (1) U.S. gallons.
Oil Fill Cap — Check and fill engine with oil here.
On/Off Switch — Set this switch to "On" before using
recoil starter. Set switch to "Off" to switch off engine.
Priming Plug — Fill pump with water here to prime
pump before starting.
Pump Chamber — Be sure to fill with water before
starting.
Serial Number Label — Provides model, revision and
serial number of water pump. Please have these readily
available when calling for assistance.
Starter Handle — Used to start the engine.
Strainer Basket (not shown) — Used to limit passage
of abrasive materials into the pump.
Suction Inlet — Connect reinforced suction hose here.
Engine Speed Lever — Used to adjust engine speed to
control pump output.
Water Drain Plug — Remove to drain water from pump
and flush internal components with clean water.
Fuel Tank
Air Cleaner
On/Off Switch
Water Drain Plug
Choke Lever Starter Handle
Priming Plug
Oil Fill Cap (located
at base of engine)
Discharge Outlet
Serial Number
Label
Suction Inlet
Fuel Shutoff Valve
Engine Speed
Lever
Pump Chamber

ASSEMBLY
8
ASSEMBLY
Your water pump requires some assembly and is ready for
use after it has been properly serviced with the
recommended oil and fuel.
If you have any questions with the assembly of your water
pump, please call the helpline at 1-800-743-4115. If calling for
assistance, please have the model, revision, and serial number
from the serial number label available. See “KnowYour Water
Pump” section for serial number label location.
Unpack Water Pump
1. Remove everything from carton except water pump.
2. Open carton completely by cutting each carton corner
from top to bottom.
Carton Contents
Items in the carton include:
• Water pump
• Oil bottle
• Parts bag (which includes the following):
• This owner’s manual
• Strainer basket and barb
• Hose barb (2)
• Barb cuff (2)
• Rubber seal (2)
• Hose clamp (3)
• Anti-vibration kit (which includes 4 each) (Models
073002 & 073003 only):
• Anti-vibration pad
• Bolt
• Washer
• Lock nut
• Instruction sheet
If any of the above parts are missing or damaged, call the
helpline at 1–800–743–4115.
Attach Anti-Vibration Pads
For models 073002 and 073003, you will need the following
tools to install the anti-vibration pads:
• 10mm wrench
• Socket wrench with a 10mm socket
Attach anti-vibration pads to water pump as shown on
instruction sheet included with anti-vibration kit.
IMPORTANT: You must attach anti-vibration pads prior
to adding engine oil and fuel.
Add Engine Oil
CAUTION! Any attempt to crank or start the engine
before it has been properly serviced with the
recommended oil may result in an engine failure.
1. Place water pump on a flat, level surface.
2. Clean area around oil fill and remove yellow oil fill cap.
3. Using oil funnel (optional), slowly pour entire contents
of provided oil bottle (18 oz.) into oil fill opening.
4. Replace oil fill cap and fully tighten.
NOTE: See the section “Oil” on page 18 to review oil
recommendations.

9
ASSEMBLY
Add Fuel
NOTE: This gasoline engine is certified to operate on
gasoline. Exhaust Emission Control System: EM (Engine
Modifications).
1. Use clean, fresh, regular UNLEADED fuel with a
minimum of 85 octane. DO NOT use fuel which
contains Methanol. DO NOT mix oil with fuel.
2. Clean area around fuel fill cap, remove fuel cap.
3. Slowly add regular unleaded fuel to fuel tank. Fill to red
fuel level indicator (Figure 1). Be careful not to overfill.
4. Replace fuel cap and wipe up any spilled fuel.
CAUTION! Some fuels, called oxygenated or
reformulated fuel, are fuels blended with alcohols or ethers.
Excessive amounts of these blends can damage the fuel
system or cause performance problems. If any undesirable
operating symptoms occur, use fuel with a lower
percentage of alcohol or ether.
Fresh fuel prevents gum from forming in the fuel system or
on essential carburetor parts. Purchase fuel in quantity that
can be used in 30 days.
Attach Suction Hose
You will need the following tool to install the hoses to the
water pump:
• 1/4" or 6mm standard screwdriver
Connect Suction Hose to Pump
Use a commercially available hose.The suction hose must
be reinforced with a non-collapsible wall or braided
material. DO NOT use a hose with an inside diameter
smaller than the pumps suction port size.
1. Slide barb cuff over hose barb. Insert rubber seal into
end of barb cuff (Figure 2).
2. Screw hose barb assembly onto pump in clockwise
rotation until hose barb assembly is tightened securely
(Figure 3).
WHEN ADDING FUEL
• Turn water pump OFF and let it cool at least 2 minutes
before removing fuel cap. Loosen cap slowly to relieve
pressure in tank.
• Fill fuel tank outdoors.
• DO NOT overfill tank.Allow space for fuel expansion.
• Keep fuel away from sparks, open flames, pilot lights, heat, and
other ignition sources.
• DO NOT light a cigarette or smoke.
Fuel and its vapors are extremely flammable and
explosive.
Fire or explosion can cause severe burns or
death.
WARNING
Figure 1 - Add Fuel to Indicator
Figure 2 - Assemble Hose Barb
Figure 3 - Connect Hose Barb to Pump
Fuel Level
Indicator

ASSEMBLY
10
3. Slide hose clamp over end of hose. Slide suction hose
onto hose barb (Figure 4).Tighten hose clamp securely
using a standard 1/4” (6mm) screwdriver.
Attach Suction Hose to Strainer Basket
Slide hose clamp over hose.Attach open end of suction
hose to strainer hose barb (Figure 5).Tighten hose clamp
securely using a standard 1/4” (6mm) screwdriver.
Connect Discharge Hose (Optional)
If desired, use a commercially available hose. DO NOT use
a hose with an inside diameter smaller than the pump’s
discharge port size.
1. Slide barb cuff over hose barb. Insert rubber seal into
end of barb cuff (see Figure 2, earlier).
2. Screw hose barb assembly onto pump in clockwise
rotation until hose barb assembly is tightened securely
(Figure 6).
3. Slide hose clamp over end of discharge hose. Slide
discharge hose onto hose barb (Figure 7).Tighten hose
clamp securely using a standard 1/4” (6mm)
screwdriver.
Figure 5 - Attach Suction Hose to Strainer Hose Barb
Figure 6 - Connect Hose Barb to Pump
Figure 7 - Connect Discharge Hose to Hose Barb
Figure 4 - Connect Suction Hose to Hose Barb

11
OPERATION
USING THE WATER PUMP
Safe Operating Considerations
Clearances and Air Movement
The water pump must be at least 5 ft. (152 cm) from
structures having combustible walls and/or other
combustible materials. Leave at least 3 ft. (92 cm) all around
water pump including overhead, for adequate cooling,
maintenance and servicing.
DO NOT place water pump where exhaust gas could
accumulate and enter inside or be drawn into a potentially
occupied building. Ensure exhaust gas is kept away from any
windows, doors, ventilation intakes or other openings that
can allow exhaust gas to collect in a confined area
(Figure 8). Prevailing winds and air currents should be taken
into consideration when positioning water pump.
What is “Head”?
Head refers to the height of a column of water that can be
delivered by the discharge of the pump.
Suction Head is the vertical distance between the center of
the pump and the surface of the liquid on the suction side
of the pump. May also be referred to as “suction lift”.The
atmospheric pressure of 14.7 psi at sea level limits suction
head lift to less than approximately 26 feet for any pump.
Discharge Head is the vertical distance between the pump’s
discharge port and the point of discharge, which is the
liquid surface if the hose is submerged or pumping into the
bottom of a tank.
Total Head is the sum of the suction head value plus the
discharge head value.
As water pumping height increases, pump output decreases.
The length, type, and size of the suction and discharge
hoses can also significantly affect pump output.
It is important for the suction operation to be the shorter
part of the total pumping action.This will decrease the
priming time and improve pump performance by increasing
the discharge head.
Suction head is a maximum of 25 feet and discharge head
should be a maximum of 81 feet.Total head can not be
more than 106 feet (Figure 9, next page).
Move Water Pump to Safe
Operating Location
For best pump performance, locate the pump on a flat, level
surface as close as possible to the water to be pumped.
Secure water pump to avoid tipover. Use hoses that are no
longer than necessary.
IMPORTANT: Direct open end of discharge hose away
from home, electrical devices or anything not desired to
get wet.
Figure 8 — Water Pump Clearance
Exhaust Port
Typical Water Pump Shown
• Operate water pump ONLY outdoors.
• Keep exhaust gas from entering a confined area through
windows, doors, ventilation intakes or other openings.
• DO NOT operate water pump inside any building, confined
area or enclosure, such as basements, garages or a similar
location, even if doors or windows are open.
Running water pump gives off carbon monoxide,
an odorless, colorless, poison gas.
Breathing carbon monoxide may cause nausea,
fainting or death.
WARNING
WHEN OPERATING EQUIPMENT
• This water pump is not for use in mobile equipment or
marine applications.
• DO NOT tip engine or equipment at angle which causes fuel
to spill.
• Secure water pump. Loads from hoses may cause tipover.
Fuel and its vapors are extremely flammable and
explosive.
Fire or explosion can cause severe burns or
death.
WARNING

OPERATION
12
Prime the Water Pump
1. Remove plug from top of pump (Figure 10).
2. Fill pump with clean, clear water up to top of discharge
outlet (Figure 10).
3. Replace pump plug.
Locate Strainer Basket Into Water
Source
Place strainer basket into water to be pumped. Basket must
be fully immersed in water (Figure 11).
• NEVER operate pump without strainer connected to end of
suction hose.
• Keep strainer out of sand or silt, place in bucket or on stones.
• DO NOT let pump run dry or damage to seals may result.
Improper treatment of water pump can damage it and
shorten its life.
CAUTION
Figure 11 — Place Strainer Basket into Water
• Be sure pump chamber is filled with water before starting the
engine. NEVER run pump without priming.
Improper treatment of water pump can damage it and
shorten its life.
CAUTION
Figure 10 — Prime the Water Pump
Typical Water Pump Shown
Figure 9 — Head
Typical Water Pump Shown
Discharge Head
- 81 feet (25m)
Maximum
Suction Head
- 25 feet (8m)
Maximum
Total Head
- 106 feet (32m)
Maximum

13
OPERATION
Starting the Water Pump
Use the following start instructions:
1. Make sure unit is on a flat, level surface and pump
chamber is primed.
2. Turn white fuel valve to “On” position (Figure 12).The
fuel valve handle will be vertical (pointing toward the
ground).
3. Push on/off switch to “On” position (Figure 13).
4. Move engine speed lever to “Fast” ( ) position
(Figure 13).
5. Move choke lever to “Choke” ( ) position (Figure 14).
6. Grasp recoil handle and pull slowly until slight
resistance is felt.Then pull handle rapidly to overcome
compression, prevent kickback and start engine.
IMPORTANT: If excessive fuel is present in the air/fuel
mixture causing a “flooded” condition, move choke lever to
“Run” ( ) position and pull handle repeatedly until engine
starts.
7. Move choke lever to “Run” ( ) position a short
distance at a time over several seconds in warm
weather or minutes in cold weather. Let engine run
smoothly before each change. Operate with choke in
“Run” position.
IMPORTANT: It may take a few minutes for water pump
to begin pumping water.
Pump output is controlled by adjusting engine speed.
Moving the engine speed lever in the “Fast” direction will
increase pump output, and moving the engine speed lever
in the “Slow” direction will decrease pump output.
• When starting engine, pull cord slowly until resistance is felt
and then pull rapidly to avoid kickback.
Rapid retraction of starter cord (kickback) will
pull hand and arm toward engine faster than
you can let go.
Broken bones, fractures, bruises or sprains could
result.
WARNING
Figure 13 — On/Off Switch and Engine Speed Lever
Switch is shown in
“On” position
Lever is shown in
“Fast” position
Figure 12 — FuelValve
Fuel Valve is shown in
“On” position
Figure 14 — Choke Lever
Choke Lever
shown in
“Choke”
position
• DO NOT touch hot surfaces and avoid hot exhaust gases.
• Allow equipment to cool before touching.
• The water pump must be at least 5 feet from structures
having combustible walls and/or other combustible materials.
• Keep at least 3 feet of clearance on all sides of water pump
for adequate cooling, maintenance and servicing.
• Reflective exhaust heat may damage fuel tank causing fire.
• Code of Federal Regulation (CFR) Title 36 Parks, Forests, and
Public Property require equipment powered by an internal
combustion engine to have a spark arrester, maintained in
effective working order, complying to USDA Forest service
standard 5100-1C or later revision. In the State of California a
spark arrester is required under section 4442 of the California
Public resources code. Other states may have similar laws.
Running engines produce heat.Temperature of
muffler and nearby areas can reach or exceed
150°F (65°C).
Severe burns can occur on contact.
Combustible debris, such as leaves, grass, brush,
etc. can catch fire.
WARNING

OPERATION
14
Stopping the Water Pump
1. Move engine speed lever to “Slow” ( ) position
(Figure 13).
2. Push on/off switch to “Off” position (Figure 13).
3. Turn white fuel valve to “Off” position (Figure 12).
Drain and Flush Water Pump
1. Disconnect and drain suction and discharge hoses.
2. Remove drain plug at bottom of pump (Figure 15).
3. Remove plug from top of pump and flush internal
components of pump with clean water (Figure 16).
4. Replace both plugs and finger tighten.
Figure 15 — Remove Drain Plug
Figure 16 — Remove Plug from Top of Pump and Flush
DO NOT stop engine by moving choke lever to “Choke”
position. Backfire, fire or engine damage could occur.
CAUTION

SPECIFICATIONS
15
ENGINE TECHNICAL
INFORMATION
These water pumps are powered by a single cylinder,
overhead valve(OHV), air cooled, low emissions engine.
In the State of California, these water pump engines are
certified by the California Air Resources Board to meet
emissions standards for 250 hours. Such certification does
not grant the purchaser, owner or operator of this engine
any additional warranties with respect to the performance
or operational life of this engine.The engine is warranted as
stated elsewhere in this manual.
Power Ratings
The power ratings for an individual engine model are
initially developed by starting with SAE (Society of
Automotive Engineers) code J1940 (Small Engine Power &
Torque Rating Procedure) (Revision 2002-05). Given both
the wide array of products on which our engines are
placed, and the variety of environmental issues applicable to
operating the equipment, it may be that the engine you
have purchased will not develop the rated horsepower
when used in a piece of power equipment (actual “on-site”
power).This difference is due to a variety of factors
including, but not limited to, the following: differences in
altitude, temperature, barometric pressure, humidity, fuel,
engine lubrication, maximum governed engine speed,
individual engine to engine variability, design of the
particular piece of power equipment, the manner in which
the engine is operated, engine run-in to reduce friction and
clean out of combustion chambers, adjustments to the
valves and carburetor, and other factors.The power ratings
may also be adjusted based on comparisons to other
similar engines utilized in similar applications, and will
therefore not necessarily match the values derived using
the foregoing codes.
PRODUCT
SPECIFICATIONS
Model 073001
Water Pump Specifications
Suction Port Diameter . . . . . . . . . . . . . . . . . . . . 2 in (50 mm)
Discharge Port Diameter . . . . . . . . . . . . . . . . . . 2 in (50 mm)
Total Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 ft (32 m)
Maximum Head
Suction Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ft (8 m)
Discharge Lift . . . . . . . . . . . . . . . . . . . . . . . . . 81 ft (25 m)
Maximum Discharge Capacity . 155 US gal (586 l) per minute
Shipping Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 lbs.
Engine Specifications
Rated Horsepower . . . . . . . . . . . . . . . . . . . . . 5.5 at 3600 rpm
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.69 in. (68mm)
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.20 in. (56mm)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . 12.48 in. (206 cc)
Spark Plug
Type: . . . . . . . . . . . . . . Champion RC12YC or Equivalent
Set Gap To: . . . . . . . . . . . . . . . . . . . . 0.030inch (0.76mm)
Armature Air Gap: . . . . . . . . . . . . . . . . . . . . . . 0.010-0.014 in.
(0.25-0.36mm)
Valve clearance with valve springs installed and piston 1/4 in.
(6 mm) past top dead center of compression stroke (check when
engine is cold).
Intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.004-0.006 in.
(0.10-0.15 mm)
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.009-0.011 in.
(0.23-0.28 mm)
Fuel Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 U.S. gallons
Oil Capacity . . . . . . . . . . . . . . . . . . . .20 Ounces (.6 Liters)
Oil Type:
Above 40° F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SAE 30
Below 40° F . . . . . . . . . . . . . . . . .SAE 5W-30 or 10W-30
NOTE: For practical operation, the horsepower loading
should not exceed 85% of rated horsepower. Engine power
will decrease 3-1/2% for each 1,000 feet (300 meters)
above sea level and 1% for each 10° F (5.6° C) above 77° F
(25° C). It will operate satisfactorily at an angle up to 15°.

SPECIFICATIONS
16
Model 073002
Water Pump Specifications
Suction Port Diameter . . . . . . . . . . . . . . . . . . . . 2 in (50 mm)
Discharge Port Diameter . . . . . . . . . . . . . . . . . . 2 in (50 mm)
Total Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 ft (32 m)
Maximum Head
Suction Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ft (8 m)
Discharge Lift . . . . . . . . . . . . . . . . . . . . . . . . . 81 ft (25 m)
Maximum Discharge Capacity . 155 US gal (586 l) per minute
Shipping Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 lbs.
Engine Specifications
Rated Horsepower . . . . . . . . . . . . . . . . . . . . . 5.5 at 3600 rpm
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.69 in. (68mm)
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.20 in. (56mm)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . 12.48 in. (206 cc)
Spark Plug
Type: . . . . . . . . . . . . . . Champion RC12YC or Equivalent
Set Gap To: . . . . . . . . . . . . . . . . . . . . 0.030inch (0.76mm)
Armature Air Gap: . . . . . . . . . . . . . . . . . . . . . . 0.010-0.014 in.
(0.25-0.36mm)
Valve clearance with valve springs installed and piston 1/4 in.
(6 mm) past top dead center of compression stroke (check when
engine is cold).
Intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.004-0.006 in.
(0.10-0.15 mm)
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.009-0.011 in.
(0.23-0.28 mm)
Fuel Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 U.S. gallons
Oil Capacity . . . . . . . . . . . . . . . . . . . .20 Ounces (.6 Liters)
Oil Type:
Above 40° F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SAE 30
Below 40° F . . . . . . . . . . . . . . . . .SAE 5W-30 or 10W-30
NOTE: For practical operation, the horsepower loading
should not exceed 85% of rated horsepower. Engine power
will decrease 3-1/2% for each 1,000 feet (300 meters)
above sea level and 1% for each 10° F (5.6° C) above 77° F
(25° C). It will operate satisfactorily at an angle up to 15°.
Model 073003
Water Pump Specifications
Suction Port Diameter . . . . . . . . . . . . . . . . . . . . 3 in (76 mm)
Discharge Port Diameter . . . . . . . . . . . . . . . . . . 3 in (76 mm)
Total Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 ft (32 m)
Maximum Head
Suction Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ft (8 m)
Discharge Lift . . . . . . . . . . . . . . . . . . . . . . . . . 81 ft (25 m)
Maximum Discharge Capacity . 240 US gal (908 l) per minute
Shipping Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 lbs.
Engine Specifications
Rated Horsepower . . . . . . . . . . . . . . . . . . . . . 6.5 at 3600 rpm
Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.69 in. (68mm)
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.20 in. (56mm)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . 12.48 in. (206 cc)
Spark Plug
Type: . . . . . . . . . . . . . . Champion RC12YC or Equivalent
Set Gap To: . . . . . . . . . . . . . . . . . . . . 0.030inch (0.76mm)
Armature Air Gap: . . . . . . . . . . . . . . . . . . . . . . 0.010-0.014 in.
(0.25-0.36mm)
Valve clearance with valve springs installed and piston 1/4 in.
(6 mm) past top dead center of compression stroke (check when
engine is cold).
Intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.004-0.006 in.
(0.10-0.15 mm)
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.009-0.011 in.
(0.23-0.28 mm)
Fuel Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 U.S. gallons
Oil Capacity . . . . . . . . . . . . . . . . . . . .20 Ounces (.6 Liters)
Oil Type:
Above 40° F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SAE 30
Below 40° F . . . . . . . . . . . . . . . . .SAE 5W-30 or 10W-30
NOTE: For practical operation, the horsepower loading
should not exceed 85% of rated horsepower. Engine power
will decrease 3-1/2% for each 1,000 feet (300 meters)
above sea level and 1% for each 10° F (5.6° C) above 77° F
(25° C). It will operate satisfactorily at an angle up to 15°.

MAINTENANCE
17
General Recommendations
Regular maintenance will improve the performance and
extend the life of the water pump. See any authorized
Briggs & Stratton dealer for service.
The water pump’s warranty does not cover items that have
been subjected to operator abuse or negligence.To receive
full value from the warranty, the operator must maintain
water pump as instructed in this manual.
Some adjustments will need to be made periodically to
properly maintain your water pump.
All service and adjustments should be made at least once
each season. Follow the requirements in the “Maintenance
Schedule” chart above.
NOTE: Once a year you should clean or replace the spark
plug and replace the air filter.A new spark plug and clean
air filter assure proper fuel-air mixture and help your
engine run better and last longer.
Emissions Control
Maintenance, replacement or repair of the emissions control
devices and systems may be performed by any non-road
engine repair establishment or individual. See emissions
control system warranty, elsewhere in this manual.
Maintenance
Maintenance consists of keeping the water pump clean.
Store the unit in a clean dry environment where it will not
be exposed to excessive dust, dirt, moisture or any
corrosive vapors. Cooling air slots in the water pumps
engine must not become clogged with dirt, leaves or any
other foreign material.
NOTE: DO NOT use a garden hose to clean water pumps
engine.Water can enter engine fuel system and cause
problems.
Cleaning
Daily or before use, look around and underneath water
pump for signs of oil or fuel leaks. Clean accumulated debris
from inside and outside water pump. Keep linkage, spring and
other engine controls clean. Keep area around and behind
muffler free from any combustible debris.
Engine parts should be kept clean to reduce the risk of
overheating and ignition of accumulated debris.
• Use a damp cloth to wipe exterior surfaces clean.
• Use a soft bristle brush to loosen caked on dirt or oil.
• Use a vacuum cleaner to pick up loose dirt and debris.
MAINTENANCE SCHEDULE
Follow the hourly or calendar intervals, whichever occurs first.
More frequent service is required when operating in adverse conditions noted below.
¹ Change oil after the first (5) operating hours and every 50 hours or every year, whichever occurs first, thereafter.
Change oil sooner when operating under dirty or dusty conditions.
² Replace more often under dirty or dusty conditions.
MAINTENANCE SCHEDULE
FILL IN DATES AS YOU COMPLETE
REGULAR SERVICE
SERVICE DATES
SERVICE DATES
MAINTENANCE TASK Before
Each Use
Every 25 Hours
or Yearly
Every 50 Hours
or Yearly
Every 100 Hours
or Yearly
Clean debris X
Check oil level X
Change engine oil X¹
Service air cleaner X²
Service spark plug X
Service spark arrester X
Clean cooling system X²
Prepare for storage If unit is to remain idle for longer than 30 days.

MAINTENANCE
18
• Use low pressure air (not to exceed 25 psi) to blow away
dirt. Inspect cooling air slots and opening on water pump.
These openings must be kept clean and unobstructed.
Remove silt and sludge buildup in pump body:
• Open priming plug and remove drain plug.
• Flush internal components of pump with clean water.
Oil
Oil Recommendations
NOTE: When adding oil to the engine crankcase, use only
high quality detergent oil rated with API service
classification SF, SG, SH, SJ or higher. DO NOT use special
additives.
1. Choose a viscosity according to the table below:
* The use of multi-viscosity oils (5W-30, 10W-30, etc.) in
temperatures above 40°F (4°C) will result in higher than
normal oil consumption.When using a multi-viscosity oil,
check oil more frequently.
** The use of SAE 30 oil in temperatures below 40°F (4°C)
will result in hard starting and possible engine bore damage
due to inadequate lubrication.
NOTE: Synthetic oil meeting ILSAC GF-2,API certification
mark and API service symbol with “SJ/CF ENERGY
CONSERVING” or higher, is an acceptable oil at all
temperatures. Use of synthetic oil does not alter required
oil change intervals.
Checking Oil Level
Oil level should be checked prior to each use or at least
every 8 hours of operation. Keep oil level maintained.
1. Make sure unit is on a level surface.
2. Remove oil fill cap and wipe clean with cloth.
3. Verify oil is at the point of overflowing at oil fill
opening.
Adding Engine Oil
1. Make sure unit is on a level surface.
2. Check oil level as described in “Checking Oil Level”.
3. If needed, slowly pour oil into oil fill opening to the
point of overflowing at oil fill cap.
Changing Engine Oil
Change the oil after the first 5 hours of operation. Change
oil every 50 hours thereafter. If you are using your water
pump under extremely dirty or dusty conditions, or in
extremely hot weather, change the oil more often.
KEEP OUT OF REACH OF CHILDREN. DON'T
POLLUTE. CONSERVE RESOURCES. RETURN
USED OIL TO COLLECTION CENTERS.
Change the oil while the engine is still warm from running,
as follows:
1. Make sure unit is on a level surface.
2. Disconnect the spark plug wire from the spark plug
and place the wire where it cannot contact spark plug.
• Used motor oil has been shown to cause skin cancer in
certain laboratory animals.
• Thoroughly wash exposed areas with soap and water.
Avoid prolonged or repeated skin contact with used
motor oil.
CAUTION
WHEN ADJUSTING OR MAKING REPAIRS TO YOUR
WATER PUMP
• Disconnect the spark plug wire from the spark plug and place
the wire where it cannot contact spark plug.
WHEN TESTING FOR ENGINE SPARK
• Use approved spark plug tester.
• DO NOT check for spark with spark plug removed.
Unintentional sparking can result in fire or
electric shock.
WARNING
Synthetic 5W-30, 10W-30
5W-30, 10W-30
30
°F -20 0 20 32 40 60 80 100
°C -30 -20 -10 0 10 20 30 40
STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

MAINTENANCE
19
3. Clean area around oil drain plug.The oil drain plug is
located at base of engine, opposite carburetor (Figure 17).
4. Remove oil drain plug and drain oil completely into a
suitable container.
5. Reinstall oil drain plug and tighten securely. Remove oil
fill cap.
6. Slowly pour oil (about 20 oz.) into oil fill opening to
the point of overflowing at oil fill cap (Figure 17). DO
NOT overfill.
7. Reinstall oil fill cap. Finger tighten cap securely.
8. Wipe up any spilled oil.
Service Air Cleaner
Your engine will not run properly and may be damaged if
you run it with a dirty air cleaner.
Replace the air cleaner every 25 hours of operation or
once each year, whichever comes first. Replace more often
if operating under dirty or dusty conditions.
To service the air cleaner, follow these steps:
1. Loosen screw and tilt cover down (Figure 18).
2. Carefully remove cartridge assembly.
3. To clean cartridge, gently tap pleated paper side on a
flat surface.
4. Reinstall clean or new cartridge inside cover.
5. Insert cover’s tabs into slots in bottom of base.
6. Tilt cover up and tighten screw securely to base.
Service Spark Plug
Change the spark plug every 100 hours of operation or
once each year, whichever comes first.This will help your
engine to start easier and run better.
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. Check electrode gap with wire feeler gauge and set
spark plug gap to 0.030 inch (0.76mm) if necessary
(Figure 19).
4. Replace spark plug if electrodes are pitted, burned or
porcelain is cracked. Use the recommended
replacement plug.
5. Install spark plug and tighten firmly.
Figure 18 - Air Cleaner
Figure 19 — Spark Plug
Figure 17 — Oil Drain Plug and Oil Fill Cap
Oil Drain Plug Oil Fill Opening

MAINTENANCE
20
Clean Spark Arrester Screen
The engine exhaust muffler may be equipped a spark
arrester screen. If equipped, inspect and clean the screen
every 50 hours of operation or once each year, whichever
comes first.
If you use your water pump on any forest-covered, brush-
covered, or grass-covered unimproved land, it must have a
spark arrester.The spark arrester must be maintained in
good condition by the owner/operator.
If the engine has been running, the muffler will be very hot.
Allow the muffler to cool before servicing the spark
arrester.
• Remove spark arrester screen for cleaning and inspection
(Figure 20).
• Inspect screen and replace if torn, perforated or
otherwise damaged. DO NOT use a defective screen. If
screen is not damaged, clean it with commercial solvent.
• Reattach spark arrester screen to muffler.
NOTE: You can purchase a new spark arrester screen by
calling 1-800-743-4115.
Air Cooling System
Over time debris may accumulate in cylinder cooling fins
and cannot be observed without partial engine disassembly.
For this reason, we recommend you have an authorized
Briggs & Stratton service dealer clean the cooling system
per recommended intervals (see “Maintenance Schedule”
on page 14). Equally important is to keep top of engine free
from debris. See “Cleaning”.
Figure 20 - Spark Arrester
Typical Spark
Arrester Shown
• DO NOT touch hot surfaces and avoid hot exhaust gases.
• Allow equipment to cool before touching.
• The water pump must be at least 5 feet from structures
having combustible walls and/or other combustible materials.
• Keep at least 3 feet of clearance on all sides of water pump
for adequate cooling, maintenance and servicing.
• Reflective exhaust heat may damage fuel tank causing fire.
• Code of Federal Regulation (CFR) Title 36 Parks, Forests, and
Public Property require equipment powered by an internal
combustion engine to have a spark arrester, maintained in
effective working order, complying to USDA Forest service
standard 5100-1C or later revision. In the State of California a
spark arrester is required under section 4442 of the California
Public resources code. Other states may have similar laws.
Running engines produce heat.Temperature of
muffler and nearby areas can reach or exceed
150°F (65°C).
Severe burns can occur on contact.
Combustible debris, such as leaves, grass, brush,
etc. can catch fire.
WARNING