Attwood Heavy-Duty Bilge Pumps 1700 User Manual

Heavy duty bilge pump, Warning

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HEAVY DUTY BILGE PUMP

4730, 4740, 4760 & 4770

INSTALLATION INSTRUCTIONS

05/10

69424 Rev. A

FEATURES:

Attwood Heavy Duty Bilge Pumps are the newest development in high output pumps. All models have
a removable strainer basket for simple installation and easy cleaning. There are two ways to confi gure
your Heavy Duty Bilge Pump - Automatic Operation or Manual Operation. The bilge pump system can be
converted to fully-automatic operation by installing the S3 Electronic Bilge Switch (part no. 4801 or 4802).

AUTOMATIC OPERATION

All boats over 20' (6.1 m) in length which have sleeping accommodations (excluding fold-out cockpit
seats) require automatic bilge pump systems. For fully-automatic operation, follow the AUTOMATIC
ELECTRONIC SWITCH INSTALLATION and AUTOMATIC OPERATION WIRING instructions.

MANUAL OPERATION

For manual operation of your bilge pump system, disregard the references to Automatic Switch Installation
and operation. Check the chart below to select the proper pump, fuse size, and thru-hull connector for your
boat application.

Part
Number

Model

Volts

Amp Fuse

Outlet Hose
Inside Dia.

Thru-Hull
Connector

4730

HD 1700

12VDC

10

1-1/8

" (29 mm)

3874/67557

4740

HD 1700

24VDC

5

1-1/8

" (29 mm)

3874/67557

4760

HD 2000

12VDC

12

1-1/8

" (29 mm)

3874/67557

4770

HD 2000

24VDC

12

1-1/8

" (29 mm)

3874/67557

Recommendations are based on amount of gallons exhausted per hour (GPH). GPH measurements
are typical of production pumps tested using smooth-bore hoses, at 0’ head. “Head” refers to the vertical
distance between the pump nozzle and the water discharge location. GPH is reduced as head is
increased.

The chart below shows gallons and liters per hour ratings for 0' head and 3' (91.4 cm) head. GPH/LPH
may also vary depending on power source, hose type, and other variables.

ABYC Specifi cations

ISO Specifi cations

13.6 volts DC

12.0 volts DC

(GPH=Gallons Per Hour)

(LPH=Liters Per Hour)

Part
Number

Model

GPH
Open Flow

LPH
Open Flow

GPH
3
' Head

LPH
3
Head

Amp
Draw

4730

HD 1700

1650

6245

1260

4780

5.6

4740

HD 1700

1650

6245

1260

4780

2.8

4760

HD 2000

1850

7003

1390

5260

6.4

4770

HD 2000

1850

7003

1390

5260

3.2

The pumps can run dry for limited periods of time; however, doing so could cause pump failure.

WARNING:

To prevent personal injury, always disconnect the power source when installing or servicing any electrical
product. Remove vessel from water when using any 110/120 or 220 Volt AC power tools.

DO NOT use pump to remove gasoline, oil or other fl ammable liquids. Doing so could result in fi re,
explosion, and serious personal injury.

Always use the fuse amperage rating specifi ed for your pump model. Failure to do so could result in
serious personal injury or fi re hazards. Attwood bilge pumps are designed to exhaust standing WATER
ONLY. They are not intended to prevent rapid accumulation of on-board water due to rough weather,
severe storms, hull damage, and/or other unsafe navigational conditions.

Do not allow materials containing acetic acid (vinegar smell) such as silicone rubber sealant to contact the
plastic parts of the pump. They may react with the plastic, causing cracks and pump failure.

Notice:
Discharge of oil prohibited. The Federal Water Pollution Control Act prohibits the discharge of oil or oily
waste into the contiguous zone. Violators are subject to a penalty of $5,000.

REQUIRED FOR INSTALLATION:

Drill and suitable drill bits

Screwdriver and four #8 stainless steel pan head screws

Attwood thu-hull connector of appropriate size (if not already installed on boat; see chart)

Marine sealant (Part No. 30110)

1-1/8

" (29mm) inside diameter smooth-bore hose of suitable length

Two appropriate hose clamps

16-gauge wire, brown

16-gauge wire, black

Attwood 2-Way Dash-Mounted Control Switch (Part No. 7615), 3-Way Switch (Part No. 7615A)

Fuse holder and appropriate fuse (see chart)

Two insulated terminal connectors for 16-gauge wire

Suitable materials to waterproof electrical connections

If automatic operation is desired:

Attwood Automatic Float Switch, Part No. 4201 (with cover) or 4202 (with out cover) or S3 Electronic

Switch, Part No. 4801 or 4802
Additional #8 pan-head stainless steel attaching screws

The following materials are needed if no pump mounting pad is in place:

1/2

" (1.27 cm) thick marine plywood block large enough to mount pump (and automatic fl oat switch,

if used)
Hand-held roller

Fiberglass—18 oz. (.5kg) mat or woven roving

Polyester resin and catalyst

MOUNTING PREPARATION

(Figure 1)

Choose a bilge pump mounting location in the lowest accessible part of the bilge. In this location,

1.

pump will remove the last 1

" (2.54 cm) of standing water. Also, pump should be as close to the thru-hull

connector as possible, for short discharge hose length.

To Install mounting pad on fi berglass hull: Sand gelcoat or paint off the mounting surface to create an area

2.

that is 3

" (7.6 cm) wider than the mounting pad on each side.

Completely cover the mounting pad with fi berglass. Saturate the fi berglass with resin, and press the
fi berglass edges down against the hull to adhere the pad in place. Roll out the fi berglass to remove any
uneven surfaces, air bubbles, or excess resin.

To Install mounting pad on aluminum hull:
If your boat is not equipped with a bilge pump mounting pad we recommend that you consult your boat
dealer or repair facility for instructions regarding fabrication and installation of a suitable mounting pad.

PUMP MOUNTING INSTRUCTIONS

(Figure 2)

Determine which direction you want pump outlet fi tting to point after installation. Mark pump base and

1.

mounting pad in desired position. If Automatic Switch is to be installed, allow enough room on pad for
the switch.

Remove strainer basket from motor housing by depressing lock tab and twisting.

2.

Screw down strainer basket with four #8 screws.

3.

Attach pump to basket by pressing pump down into basket and twisting until the lock button snaps into

4.

place.

AUTOMATIC ELECTRONIC SWITCH INSTALLATION

(Figure 3)

HOSE CONNECTION INSTRUCTIONS

If no thru-hull connector exists:

1.

Install connector well above the water line (just under the rub rail is best) on the driver side, where water
discharge can be easily monitored. Drill a hole through the hull to clear the connector threads.

Apply marine sealant around inside of nut fl ange (do not allow sealant to contact pump housing). Fully
insert thru-hull connector, and screw nut fl ange down tightly. Do not over tighten.

Run hose from pump nozzle up to thru-hull connector, through the most direct and unobstructed

2.

path possible.

Before connecting hoses, cut any extra length from hose that causes downward dips or kinds in discharge

3.

line (dips can trap water and airlock the pump). Be sure the hose tension on the pump outlet is minimized
to reduce stress on the pump components.

Place hose clamps onto hose ends. Connect ends to pump nozzle and thru-hull connector, ensuring that

4.

hoses ends fi t tightly over barbs.

Secure both connections with hose clamps.

5.

WIRING INSTRUCTIONS FOR AUTOMATIC OPERATION

(Figure 4)

NOTE: The selected switch must have an amp rating equal to or greater than the recommended fuse.
Make all wire connections above the highest possible water level, using marine grade wire connectors only.
Waterproof all connections with suitable materials. NOTE: Failure to make waterproof connections and
fuse pump properly will void the product warranty.

Splice suitable lengths of brown and black 16-gauge wire to exiting pump wiring, enough to reach ON/

1.

OFF/AUTO switch, automatic electronic switch, and battery.

Using insulated terminal connectors:

2.

Connect positive lead (brown) to the ON/OFF/AUTO switch.

Connect negative lead (black) to negative (-) battery terminal.

In a location easily accessible for charging fuses, splice fuse holder into positive lead (brown). The fuse
holder must be installed within 72

" (183 cm) of the positive (+) battery terminal. Connect remaining lead

from fuse holder to positive (+) terminal of the three-way switch.

Splice the remaining positive lead (brown) from the automatic fl oat switch into the positive lead (brown)

3.

from the pump.

Connect the spliced leads to the “Manual” terminal of the three-way switch.

4.

Important:
Although the switch is submersible, the lead wires must terminate in a waterproof connection. Mount wires
above the highest possible water mark to prevent electrolysis damage to the boat.

With three-way switch on AUTO, test electronic switch by placing a water soaked rag across the two

5.

sensors until the pump turns on (6 - 10 seconds).

Test pump by ensuring that pump turns on when water level is above the top sensor of the switch,

6.

and shuts off when water level is pumped down to the pump’s inlet and the switch turns the pump off
(approximately 60 seconds). Cycle the pump with water in the bilge several times to ensure that the
system is functioning properly.

WIRING INSTRUCTIONS FOR MANUAL OPERATION

(Figure 5)

Splice suitable lengths of brown and black 16-gauge wire to existing pump wiring, enough to reach ON/

1.

OFF switch and battery.
Using insulated terminal connectors, connect positive lead (brown) to the ON/OFF switch. Connect

2.

negative lead (black) to ground.
In a location easily accessible for changing fuses, splice fuse holder into positive lead (brown). The fuse

3.

holder must be installed within 72

" (183 cm) of the positive (+) battery terminal.

To check system, feed water into the pump. If fl ow appears to be too low, make sure wires have been

4.

connected properly; brown-to-positive (switch), and black-to-negative.

CLEANING INSTRUCTIONS

(Figure 6)

To remove the motor housing from strainer basket; depress the locking tab on basket and twist motor

1.

housing counter-clockwise.
Inspect impeller chamber and outlet. Remove any foreign objects.

2.

Attach motor housing to pump basket by pressing pump down on base, then twist until lock button snaps

3.

into place.
If hair or rope get wrapped around impeller, remove chamber (see Figure 6) by rotating counter clockwise.

4.

Ensure water does not get between black plate and white motor housing. Cut tangled object off shaft.
Replace chamber, tighten clockwise to ensure proper seal.

ATTWOOD HEAVY DUTY BILGE PUMP LIMITED WARRANTY:

ATTWOOD CORPORATION, 1016 North Monroe, Lowell, Michigan 49331. (‘Attwood’) warrants to the
original consumer purchaser that this Attwood Bilge Pump will be free from defects in materials and
workmanship under normal use and service for:

Recreational/Pleasure Boats — A period of three (3) years from the date of original consumer purchase.
Commercial Boats — A period of one (1) year from the date of original consumer purchase.
Refer to www.attwoodmarine.com for more warranty information.

©2010 Attwood Corporation • 1016 North Monroe St. Lowell, MI 49331 • www.attwoodmarine.com

G

F

E

A

C

D

B

B

D

A

B

C

A

B

Figure 1

Figura 1

Figur 1

S3 Bilge Switch

A.

Hose Clamp

B.

Hose

C.

Thru-Hull Connector

D.

Waterline

E.

Hull

F.

1/2" (Min.) Thick Mounting Pad

G.

Interruptor S3 para sentinas

A.

Abrazadera para manguera

B.

Manguera

C.

Conector de casco pasante

D.

Línea del agua

E.

Casco

F.

Almohadilla de montaje de 1,27 cm de

G.

espesor (mínimo)

S3-slagströmbrytare

A.

slangklämma

B.

slang

C.

bordsgenomföring

D.

vattenlinje

E.

skrov

F.

1/2 tum (1,27 cm) (minimum) tjockt

G.

monteringsunderlag

Figure 1

Abbildung 1

Commutateur de cale S3

A.

Bride de serrage

B.

Boyau

C.

Connecteur passe-coque

D.

Ligne d’eau

E.

Coque

F.

Plaque de montage de 1,27 cm

G.

(minimum) d’épaisseur

Bilgenschalter S3

A.

Schlauchschelle

B.

Schlauch

C.

Rumpfdurchführung

D.

Wasserlinie

E.

Rumpf

F.

Montageplatte 1,27 cm (1/2”)

G.

(Mindestdicke)

Figure 4

Figura 4

Figur 4

3-Way Switch On/Auto/Manual

A.

See Fuse Chart
Brown Wire (+)

B.

Manual

C.

Auto

D.

Off

E.

Red Wire (+)

F.

See Fuse Chart

G.

72

H.

" (183 mm) Maximum Length From

(+) Terminal To Fuse Holder
12 Volt Battery

I.

S3 Bilge Switch

J.

Black Wire (-)

K.

Interruptor de tres vías encendido/

A.

automático/manual
Consulte el cuadro de fusibles
Cable marrón (+)

B.

Manual

C.

Automático

D.

Apagado

E.

Cable Rojo (+)

F.

Consulte el cuadro de fusibles

G.

183 mm de longitud máxima desde el

H.

terminal (+) hasta el portafusible
Batería de 12 voltios

I.

Interruptor S3 para sentinas

J.

Cable negro (-)

K.

3-vägsströmbrytare till/auto/manuellt

A.

Se säkringstabellen
brun kabel (+)

B.

manuellt

C.

auto

D.

från

E.

röd kabel (+)

F.

Se säkringstabellen

G.

72 tum (183 cm) maximal längd från

H.

(+)-polen till säkringshållaren
12-voltsbatteri

I.

S3-slagströmbrytare

J.

svart kabel (-)

K.

Figure 4

Abbildung 4

Commutateur à trois positions

A.

marche/auto/manuel
Reportez-vous au tableau des fusibles
Fil brun (+)

B.

Manuel

C.

Auto

D.

Arrêt

E.

File rouge (+)

F.

Reportez-vous au tableau des fusibles

G.

Longueur maximale de 183 mm de la

H.

borne (+) au porte-fusible
Batterie à 12 volts

I.

Commutateur de cale S3

J.

Fil noir (-)

K.

3-Wege Schalter Ein/Auto/Manuell

A.

Siehe Sicherungstabelle
Brauner Draht (+)

B.

Manuell

C.

Auto

D.

Aus

E.

Roter Draht (+)

F.

Siehe Sicherungstabelle

G.

Maximale Länge vom Plus-Pol (+)

H.

zum Sicherungshalter 183 mm (72

")

12 Volt Akku

I.

Bilgenschalter S3

J.

Schwarzer Draht (-)

K.

Figure 5

Figura 5

Figur 5

2-Way Switch On/Off

A.

Brown Wire (+)

B.

On

C.

Off

D.

See Fuse Chart

E.

72

F.

" (183 mm) Maximum Length From

(+) Terminal To Fuse Holder
12 Volt Battery

G.

Black Wire (-)

H.

Interruptor de dos vías encendido/apagado

A.

Cable marrón (+)

B.

Encendido

C.

Apagado

D.

Consulte el cuadro de fusibles

E.

183 mm de longitud máxima desde el

F.

terminal (+) hasta el portafusible
Batería de 12 voltios

G.

Cable negro (-)

H.

dubbelpolig till/från-strömbrytare

A.

brun kabel (+)

B.

till

C.

från

D.

Se säkringstabellen

E.

72 tum (183 cm) maximal längd

F.

från (+)-polen till säkringshållaren
12-voltsbatteri

G.

svart kabel (-)

H.

Figure 5

Abbildung 5

Commutateur à deux positions

A.

marche/arrêt
Fil brun (+)

B.

Marche

C.

Arrêt

D.

Reportez-vous au tableau des fusibles

E.

Longueur maximale de 183 mm de la

F.

borne (+) au porte-fusible
Batterie à 12 volts

G.

Fil noir (-)

H.

Ein/Aus-Schalter

A.

Brauner Draht (+)

B.

Ein

C.

Aus

D.

Siehe Sicherungstabelle

E.

Maximale Länge vom Plus-Pol (+) zum

F.

Sicherungshalter 183 mm (72”)
12 Volt Akku

G.

Schwarzer Draht (-)

H.

Figure 6

Figura 6

Figur 6

Note:

A.

Motor will be loose, don’t let

water enter this joint
Motor Housing

B.

Impeller

C.

Motor Plate

D.

Pump Chamber

E.

Importante:

A.

El motor estará suelto; no

permita que el agua entre en esta junta.
Bastidor del motor

B.

Impulsor

C.

Placa del motor

D.

Cámara de la bomba

E.

OBS!

A.

Motorn kommer att sitta löst, låt

inte vatten komma in i denna skarv.
motorhus

B.

impeller

C.

motorplatta

D.

pumpkammare

E.

Figure 6

Abbildung 6

Remarque :

A.

le moteur sera lâche, ne

laissez pas l’eau entrer par ce joint.
Boîtier du moteur

B.

Tête de pompe

C.

Plaque du moteur

D.

Boîte de la pompe

E.

Hinweis:

A.

Der Motor ist lose, kein Wasser

in die Verbindung eindringen lassen.
Motorgehäuse

B.

Rotor

C.

Motorplatte

D.

Pumpenkammer

E.

Figure 2

Figura 2

Figur 2

LOCK

A.

Mounting Screws

B.

Strainer Basket

C.

Release Tab

D.

TRABA

A.

Tornillos de montaje

B.

Cesta de fi ltro

C.

Lengüeta de liberación

D.

LÅS

A.

fästskruvar

B.

sil

C.

låsfl ik

D.

Figure 2

Abbildung 2

VERROUILLAGE

A.

Vis de montage

B.

Panier-fi ltre

C.

Languette de dégagement

D.

SICHERN

A.

Montageschrauben

B.

Filter

C.

Freigabezunge

D.

Figure 3

Figura 3

Figur 3

S3 Bilge Switch

A.

Motor Housing

B.

Interruptor S3 para sentinas

A.

Bastidor del motor

B.

S3-slagströmbrytare

A.

motorhus

B.

Figure 3

Abbildung 3

Commutateur de cale S3

A.

Boîtier du moteur

B.

Bilgenschalter S3

A.

Motorgehäuse

B.

Figure 1

Figure 4

Figure 5

Figure 6

Figure 2

Figure 3

B

K

I

F

J

C D

A

G

H

E

B

H

G

C

A

E

F

D

E

D

C

B

A

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