Briggs & Stratton 73000 User manual

073000
Operator’s Manual
Manuel d’utilisation
Manual del Operario
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BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC
JEFFERSON, WISCONSIN, U.S.A. Manual No. 197609GS
Revision A (07/12/2006)
Before using this product, read this
manual and follow all Safety Rules
and Operating Instructions.
WARNING
Antes de utilizar el producto, lea este
manual y siga todas las Reglas de
Seguridad e Instrucciones de Uso.
ADVERTENCIA
Avant d’utiliser ce produit, veuillez lire le
manuel et suivre toutes les directives
relatives à la sécurité et à l’utilisation.
AVERTISSEMENT

2
SAFETY RULES
TABLE OF CONTENTS
Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Know Your Water Pump . . . . . . . . . . . . . . . . . . . . . . . 5
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-17
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Emissions Control Warranty . . . . . . . . . . . . . . . . 21-22
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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 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
Copyright © 2006 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
These water pumps are manufactured to pump ONLY clear
water that is not intended for human consumption.
CAUTION
Fire
Explosion
Toxic Fumes Hot Surface
Electrical Shock
Kickback
Operator’s Manual
Moving Parts

3
SAFETY RULES
• 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
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.
• If fuel spills, wait until it evaporates before starting
engine.
• 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.
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 “Full
Choke” position.
WHEN TRANSPORTING OR REPAIRING EQUIPMENT
• Transport/repair with fuel tank EMPTY.
• 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

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 7 m (23 ft.)
and total head of 35 m (115 ft.). Use shortest suction
head possible (see page 8).
• 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.
• Keep at least 5 ft. (152 cm) clearance on all sides of
water pump including overhead.
• 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.
Exhaust heat/gases can ignite combustibles,
structures or damage fuel tank causing a fire.
WARNING

KNOW YOUR WATER PUMP
5
KNOW YOUR WATER PUMP
Read this Operator’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 Label — Provides model, type and code
number of engine. Please have these readily available
when calling for assistance.
Fuel Tank — Capacity of 10 fl. oz..
Oil Fill Cap/Dipstick — Check and fill engine with oil
here.
Primer Bulb — Prepares a cold engine for starting.
Priming Plug — Fill pump with water here to prime
pump before starting.
Pump Chamber — Be sure to fill with water before
starting.
Starter Handle — Used to start the engine.
Stop Switch — Push to "Stop" to switch off engine.
Serial Number Label — Provides model, revision and
serial number of water pump. Please have these
readily available when calling for assistance.
Strainer Basket (not shown) — Used to limit
passage of abrasive materials into the pump.
Suction Inlet — Connect reinforced suction hose here.
Throttle 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
Stop Switch
Water Drain Plug
Choke Lever
Starter Handle
Priming Plug
Oil Fill Cap/Dipstick
Discharge Outlet
Serial Number Label
Suction Inlet
Throttle Lever
Pump Chamber
Primer Bulb
Engine Label

ASSEMBLY
6
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 regarding 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 “Know Your Water Pump”
for location.
Unpack Water Pump
1. Remove everything from carton.
2. Ensure you have all included items prior to
assembly.
Carton Contents
Items in the carton include:
• Water pump
• Oil bottle (SAE 30)
• Suction hose
• Parts bag (which includes the following):
• This operator’s manual
• Strainer basket and barb
• Hose barb (2)
• Barb cuff (2)
• Rubber seal (2)
• Hose clamp (3)
• 1” Garden hose adapter
• Oil measure cup
If any of the above parts are missing or damaged, call
the helpline at 1–800–743–4115.
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. Lay water pump in level position on side with fuel
and oil fill facing up (Figure 1).
2. Use a rag to clear dirt and debris from around oil
fill and remove oil fill cap.
NOTE: See the section “Oil” on page 15 to review oil
recommendations. Verify provided oil bottle is correct
viscosity for current ambient temperature.
3. Keeping engine level, slowly pour entire contents
of provided oil bottle (3 oz.) into oil fill opening.
4. Replace oil fill cap and fully tighten.
5. Return water pump to normal operating position.
Add Fuel
All fuel is not the same. If a starting or performance
problem is encountered immediately after new fuel has
been used, try another service station or change
brands.
NOTE: This engine is certified to operate on gasoline.
Exhaust Emissions Control System: EM (Engine
Modifications).
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.
• If fuel spills, wait until it evaporates before starting engine.
• 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 - Water Pump in Level Position on Side

7
ASSEMBLY
Type of Fuel
1. Always use clean, fresh, unleaded gasoline with a
minimum of 87 octane/87 AKI (91 RON). Do Not
mix oil with fuel. Do not modify the engine fuel
system or carburetor to run on alternative fuels.
NOTE: Fuel with up to 10% ethanol (gasohol) or up to
15% MTBE (methyl tertiary butyl ether), is acceptable.
IMPORTANT: Use of any fuel other than those
approved above will void warranty. Some areas
require that fuel pumps be marked if the fuel contains
alcohols or ethers. If you are not sure if your fuel
contains alcohol or ethers that are different than those
approved above, then check with the service station
operator.
2. Clean area around fuel fill cap, remove cap.
3. Using a fuel funnel (optional), slowly add unleaded
gasoline until fuel level is approximately 1” below
top of fuel tank neck to allow for fuel expansion
(Figure 2). Be careful not to overfill.
4. Install fuel cap and let any spilled fuel evaporate
before starting engine.
To avoid engine performance issues, the fuel system
should be treated with a fuel preserver or emptied
before storage of 30 days or longer. To protect the fuel
system from gum formation, use Briggs & Stratton
FRESH START™ fuel stabilizer plus. If fuel preserver
is not used, drain the fuel tank, start the engine and let
it run until the fuel lines and carburetor are empty. Use
fresh fuel next season. See “Storage” on page 18 for
additional information.
NEVER use engine or carburetor cleaner products in
the fuel tank as permanent damage may occur.
High-altitude use
Operation at high altitude (over 5,000 feet), may require
a high-altitude carburetor jet kit to improve performance
and decrease fuel consumption. See your local
authorized Briggs & Stratton dealer for more information.
Connect 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
1. Slide barb cuff over hose barb. Insert rubber seal
into end of barb cuff (Figure 3).
2. Remove two plastic shipping caps from water
pump’s inlet and outlet.
3. Screw hose barb assembly onto pump in
clockwise rotation until hose barb assembly is
tightened securely (Figure 4).
4. Slide hose clamp over end of hose. Slide suction
hose onto hose barb (Figure 5). Tighten hose clamp
securely using a standard 1/4” (6mm) screwdriver.
Figure 3 - Assemble Hose Barb
Figure 4 - Connect Hose Barb to Pump
Fuel
Tank
1” Air Space
Figure 2 - Add Fuel to Fuel Tank
Figure 5 - Connect Suction Hose to Hose Barb

ASSEMBLY
8
Connect Suction Hose to Strainer Basket
Slide hose clamp over hose. Connect open end of
suction hose to strainer hose barb (Figure 6). Tighten
hose clamp securely using a standard 1/4” (6mm)
screwdriver.
Connect Discharge Hose (Optional)
1” Discharge Hose Assembly
If desired, purchase a commercially available hose
(1” inside diameter) and attach to water pump as
described.
1. Slide barb cuff over hose barb. Insert rubber seal
into end of barb cuff (see Figure 3, earlier).
2. Screw hose barb assembly onto pump in
clockwise rotation until hose barb assembly is
tightened securely (Figure 7).
3. Slide hose clamp over end of discharge hose. Slide
discharge hose onto hose barb (Figure 8). Tighten
hose clamp securely using a standard 1/4” (6mm)
screwdriver.
Garden Hose Discharge Assembly
1. Insert rubber seal into end of garden hose
adapter. Attach supplied 1” garden hose adapter
onto pump discharge port. Finger tighten in
clockwise rotation (Figure 9).
2. Attach garden hose to adapter, turning in
clockwise rotation.
Figure 6 - Connect Suction Hose to Strainer Hose Barb
Figure 7 - Connect Hose Barb to Pump
Figure 8 - Connect Discharge Hose to Hose Barb
Figure 9 - Connect Garden Hose Adapter to Discharge
Port

OPERATION
9
USING THE WATER PUMP
Safe Operating Considerations
Clearances and Air Movement
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 10). 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 23 feet (7 m) and
discharge head should be a maximum of 92 feet
(28 m). Total head can not be more than 115 feet
(35 m) (Figure 11, 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 10 — Water Pump Clearance
Exhaust Port
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
• 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
• Keep at least 5 ft. (152 cm) clearance on all sides of
water pump including overhead.
Exhaust heat/gases can ignite combustibles,
structures or damage fuel tank causing a fire.
WARNING

OPERATION
10
Prime the Water Pump
1. Remove plug from top of pump (Figure 12).
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 13).
• 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 13 — 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 12 — Prime the Water Pump
Figure 11 — Head
Discharge Head
- 92 feet (28 m)
Maximum
Suction Head
- 23 feet (7 m)
Maximum
Total Head
- 115 feet (35 m)
Maximum

11
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. Push primer bulb (Figure 14) 15 times for a new
engine. Push primer bulb 8times for all future starts.
3. Move red choke lever to “Full Choke” ( ) position
(Figure 15).
4. Move throttle lever all the way up (Figure 16).
5. While firmly grasping pump carrying handle with
left hand, pull starter handle with right hand 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 “Off Choke” ( ) position and pull handle
repeatedly until engine starts.
6. Wait a maximum of 10 seconds, then move choke
lever to “Half Choke” ( ) position.
7. Run the engine at “Half Choke” for 20 seconds or
until unit accelerates smoothly. Move choke lever to
“Off Choke” ( ) 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 throttle lever up will increase pump output,
and moving the throttle lever down 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 16 — Throttle Lever
Throttle Lever
shown fully up
Figure 14 — Primer Bulb
Figure 15 — Choke Lever
Choke Lever
shown in
“Full Choke”
position
Primer Bulb
• DO NOT touch hot surfaces and avoid hot exhaust
gases.
• Allow equipment to cool before touching.
• Keep at least 5 ft. (152 cm) clearance on all sides of
water pump including overhead.
• 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.
Exhaust heat/gases can ignite combustibles,
structures or damage fuel tank causing a fire.
WARNING

OPERATION
12
Stopping the Water Pump
1. Press stop switch to “Stop” position until engine
stops (Figure 17).
Drain and Flush Water Pump
1. Disconnect and drain suction and discharge
hoses.
2. Remove drain plug at bottom of pump (Figure 18).
3. Remove plug from top of pump and flush internal
components of pump with clean water (Figure 19).
4. Replace both plugs and finger tighten.
Figure 18 — Remove Drain Plug
Figure 19 — Remove Plug from Top of Pump and Flush
Figure 17 — Stop Switch
• DO NOT stop engine by moving choke lever to “Full
Choke” position.
Backfire, fire or engine damage could occur.
CAUTION

13
SPECIFICATIONS
ENGINE TECHNICAL
INFORMATION
This is a single cylinder, air cooled engine. It is a 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 50 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 073000
Water Pump Specifications
Suction Port Diameter . . . . . . . . . . . . . . .1 in (25 mm)
Discharge Port Diameter . . . . . . . . . . . . 1 in (25 mm)
Total Head . . . . . . . . . . . . . . . . . . . . . . . .115 ft (35 m)
Maximum Head
Suction Lift . . . . . . . . . . . . . . . . . . . . . . . .23 ft (7 m)
Discharge Lift . . . . . . . . . . . . . . . . . . . . 92 ft (28 m)
Maximum Discharge Capacity . .30 US gal (113 l) per
minute
Shipping Weight . . . . . . . . . . . . . . . . . . . . . . . .22 lbs.
Engine Specifications
Gross* Horsepower . . . . . . . . . . . . . .1.0 at 3600 rpm
Bore . . . . . . . . . . . . . . . . . . . . . . . . .1.575 in. (40 mm)
Stroke . . . . . . . . . . . . . . . . . . . . . . . .1.065 in. (27 mm)
Displacement . . . . . . . . . . . . . . . . . . .2.074 in. (34 cc)
Spark Plug
Type: . . . . . . . . . . . Champion RDJ7Y or Equivalent
Set Gap To: . . . . . . . . . . . . . . . .0.025 in. (0.64 mm)
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 . . . . . . . . . . . . .0.002-0.004 in. (0.05-0.10 mm)
Exhaust . . . . . . . . . . .0.002-0.004 in. (0.05-0.10 mm)
Fuel Capacity . . . . . . . . . . . . . . . . . .10 fl. oz. (300 ml)
Oil Capacity . . . . . . . . . . . . . . . . . . .3 Ounces (90 ml)
NOTE: 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).

MAINTENANCE
14
General Recommendations
Regular maintenance will improve the performance
and extend the life of the water pump. We recommend
you use an authorized Briggs & Stratton service dealer
for all maintenance and service. Use only genuine
Briggs & Stratton parts.
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.
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. Inspect cooling air slots and
opening on water pump. These openings must be kept
clean and unobstructed.
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.
Change oil after the first (4) operating hours and every 8 hours or every year, whichever occurs first, thereafter.
Change oil every 4 hours when operating under heavy loads or in high temperatures.
Clean more often under dusty conditions or when airborne debris is present. Replace air cleaner if very dirty.
MAINTENANCE SCHEDULE
FILL IN DATES AS YOU
COMPLETE REGULAR SERVICE
SERVICE DATES
SERVICE DATES
MAINTENANCE TASK Before Each
Use
Every 8 Hours
or Yearly
Every 50 Hours
or Yearly
Clean debris X
Check oil level X
Change engine oil X
Service air cleaner X
Service spark plug X
Prepare for storage If unit is to remain idle for longer than 30 days.

MAINTENANCE
15
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 classified “For Service
SF, SG, SH, SJ” or higher. DO NOT use special
additives.
1. Choose a viscosity according to the following
table:
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.
SAE 30: 40 °F and higher (5 °C and higher) is good
for all purpose use above 40°F, use below 40°F will
cause hard starting.
10W-30: 0 to 100 °F (-18 to 38 °C) is better for varying
temperature conditions. This grade of oil improves cold
weather starting, but may increase oil consumption at
80°F (27°C) or higher.
*Check oil level frequently at higher temperatures.
Synthetic 5W-30: -20 to 120 °F (-30 to 40 °C)
provides the best protection at all temperatures as well
as improved starting with less oil consumption.
5W-30: 40 °F and below (5 °C and below) is
recommended for winter use, and works best in cold
conditions.
Checking Oil Level
Oil level should be checked prior to each use and
changed at least every 8 hours of operation. Keep oil
level maintained.
1. Lay water pump in level position on side with fuel
and oil fill facing up.
2. Remove oil fill cap/dipstick and wipe clean with
cloth.
3. Tighten oil fill cap/dipstick down.
4. Remove and check oil level.
5. Verify oil is at FULL level by presence of oil in
dipstick hole or by measure line (Figure 20).
Adding Engine Oil
DO NOT overfill. Use oil measuring cup for filling. Add
only half ounce of oil at a time.
1. Lay water pump in level position on side with fuel
and oil fill facing up.
2. Check oil level as described above in “Checking
Oil Level”.
3. If needed, add only half ounce of oil at a time to
bring it to FULL. Re-check level.
• If engine is not level, dipstick reading will not be accurate.
This will lead to possible over or under filling causing
damage to the engine.
Engine must be level, with oil fill facing up, to check oil.
CAUTION
Figure 20 — Oil Dipstick
Hole in Dipstick

MAINTENANCE
16
Changing Engine Oil
Change the oil after the first 4 hours of operation.
Change oil every 8 hours thereafter. If you are using
your water pump under extremely dirty or dusty
conditions, or in extremely hot weather, change the oil
every 4 hours.
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. Lay water pump in level position on side with fuel
and oil fill facing up.
2. Disconnect the spark plug wire from the spark plug
and place the wire where it cannot contact spark plug.
3. Ensure fuel cap is tightened securely.
4. Clean area around oil fill cap/dipstick.
5. Remove oil fill cap/dipstick and drain oil completely
in the direction shown in Figure 21 into a suitable
container.
6. Lay water pump on side with fuel and oil fill facing
up.
7. Using oil measure cup, slowly pour oil into oil fill
opening adding half ounce at a time (Figure 22).
DO NOT overfill.
NOTE: Engine holds approximately 3 oz. (90 ml).
8. Reinstall oil fill cap/dipstick. Finger tighten cap
securely.
9. Reconnect spark plug wire to spark plug.
10. Wipe up any spilled oil.
Figure 21 — Drain Oil
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
Figure 22 — Oil Fill Opening
Oil Fill Opening
• 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

MAINTENANCE
17
Service Air Cleaner
Your engine will not run properly and may be damaged
if you run it with a dirty air cleaner.
Service the air cleaner every 8 hours of operation or
once each year, whichever comes first. Service more
often if operating under dirty or dusty conditions.
Check and clean the intake chamber for dirt. If the
foam air cleaner is dirty and worn, replace with new air
cleaner.
To service the air cleaner, follow these steps:
1. Push cover tab to release cover, then pull cover
away from the engine (Figure 23).
2. Carefully remove foam air cleaner.
3. Wash foam air cleaner in liquid detergent and
water. Squeeze dry in a clean cloth.
4. Dip foam air cleaner in engine oil and squeeze in
a clean cloth to remove excess oil.
NOTE: Engine will smoke if too much oil is left on air
cleaner.
5. Reinstall clean air cleaner.
6. Push cover closed to lock tab into base.
Service Spark Plug
Change the spark plug every 50 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 0.025 inch (0.64mm) if
necessary (Figure 24).
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 24 — Spark Plug
Figure 23 - Air Cleaner

STORAGE
18
STORAGE
The water pump should be started at least once every
seven days and allowed to run at least 30 minutes. If
this cannot be done and you must store the unit for
more than 30 days, use the following information as a
guide to prepare it for storage.
Long Term Storage Instructions
It is important to prevent gum deposits from forming in
essential fuel system parts, such as the carburetor,
fuel filter, fuel hose or tank during storage. Also,
experience indicates that alcohol-blended fuels (called
gasohol, ethanol or methanol) can attract moisture,
which leads to separation and formation of acids
during storage. Acidic fuel can damage the fuel system
of an engine while in storage.
Protect Fuel System
Fuel Stabilizer:
Follow these instructions if storing fuel more than 30 days.
To protect the fuel system from gum formation, use
Briggs & Stratton FRESH START™ fuel stabilizer plus.
If fuel stabilizer is used, you do not need to drain fuel
prior to storage.
• Run engine outdoors for several minutes to be sure
treated fuel has replaced untreated fuel in carburetor.
If fuel preserver is not used, then always remove all fuel
from tank and run engine until it stops from lack of fuel.
Change Oil
While engine is still warm, drain oil from crankcase.
Refill with recommended grade. See “Changing Oil” on
page 16.
Oil Cylinder Bore
• Remove spark plug and pour about 1 teaspoon
(5 ml) of clean engine oil into the cylinder.
• Install spark plug and pull starter handle slowly
8-10 times to distribute oil.
Water Pump
1. Drain water pump as described in “Drain and
Flush Water Pump”.
2. Clean water pump as described in “Cleaning”.
3. Check that openings on water pump are open and
unobstructed.
Other Storage Tips
1. DO NOT store fuel from one season to another
unless it has been treated as described in “Protect
Fuel System”.
2. Replace fuel can if it starts to rust. Contaminated
fuel will cause engine problems.
3. If possible, store unit indoors and cover it to give
protection from dust and dirt.
4. Cover unit with a suitable protective cover that
does not retain moisture.
5. Store water pump in clean, dry area.
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.
WHEN 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.
• Drain fuel tank outdoors.
• 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 • NEVER pull starter handle with spark plug removed.
Unintentional sparking can result in fire or
electric shock.
WARNING
• DO NOT place a storage cover over a hot water pump.
• Let equipment cool for a sufficient time before placing the
cover on the equipment.
Storage covers can be flammable.
WARNING

TROUBLESHOOTING
19
TROUBLESHOOTING
Problem Cause Correction
No pump output or low
pump output when water
pump is running.
1. Pump not primed.
2. Suction hose restricted, collapsed,
damaged, too long, or diameter too
small.
3. Strainer not completely under water.
4. Air leak at suction hose connector.
5. Strainer clogged.
6. Discharge hose restricted, damaged,
too long, or diameter too small.
7. Excessive or marginal head.
8. Throttle lever is down in slow position.
1. Fill pump chamber with water and
prime pump.
2. Replace suction hose.
3. Sink the strainer and the end of
suction hose completely under
water.
4. Replace sealing washer if missing
or damaged. Tighten hose
connector and clamp.
5. Clean debris from strainer.
6. Replace discharge hose.
7. Relocate pump and/or hoses to
reduce head.
8. Move throttle lever up to fast
position.
Engine will not start; lacks
power; starts and runs
rough; or "hunts" or
falters.
1. Dirty air cleaner.
2. Out of fuel.
3. Stale or contaminated fuel or water in
fuel.
4. Spark plug wire not connected to
spark plug.
5. Bad spark plug.
6. Excessive fuel is present in the
air/fuel mixture causing a “flooded”
condition.
7. Excessively rich fuel mixture.
8. Intake valve stuck open or closed.
9. Engine has lost compression.
10. Carburetor is running too rich or too
lean.
1. Clean or replace air cleaner.
2. Wait two minutes and fill fuel tank.
3. Drain fuel tank and carburetor; fill
with fresh fuel.
4. Connect wire to spark plug.
5. Replace spark plug.
6. Wait 5 minutes and re-crank
engine.
7. Contact Authorized service facility.
8. Contact Authorized service facility.
9. Contact Authorized service facility.
10. Contact Authorized service facility.
Engine shuts down when
running. Out of gasoline. Wait two minutes and fill fuel tank.

20
NOTES
NOTES