Whale BP3708, BP3740 Installation & User's Instructions

Thank you for purchasing this Whale® product.

For over 60 years Whale® has led the way in the design and manufacturer of water and waste systems
including:- plumbing, faucets, showers and pumps for low voltage applications. The company and its products have
built a reputation for quality, reliability and innovation backed up by excellent customer service.

For information on our full product range visit: www.whalepumps.com

CONTENTS

1. Principles of Operation

2. Specification

3. Application

4. Warnings

5. Parts List

6. Optional Extras

7. Installation

8. Maintenance

9. Trouble Shooting

10. Winterising

11. Service Support Details

12. EU Declaration of Conformity

13. Patents and Trademarks

14. Warranty

LIST OF IMAGES

Fig. 1 Through deck installation
Fig. 2 Incorrect installation
Fig. 3 Typical installation diagram
Fig. 4 Mounting arrangements for a standard model
Fig. 5 Dimensions
Fig. 6 Discharge point is well above the water line
Fig. 7 Deck fitting for Gusher Pumps (Half sectional elevation of deck fitting, pump and bracket)
Fig. 8 Exploded diagram

Read the following carefully before installation

To the Fitter:

Check that the product is suitable for the intended application. Follow these installation instructions and ensure all
relevant personnel read the points listed below. Also ensure that these operating instructions are passed on to the
end user. The manufacturer cannot be held responsible for claims arising from incorrect installation, unauthorised
modification or misuse of the product.

To the User:

Read the following instructions carefully.

Whale Gusher®10 Mk3 Pump BP3708 / BP3740

INSTALLATION & USER INSTRUCTIONS

1

This bilge pump is designed to exhaust standing water only. Manufactured from durable diecast alloy to withstand
tough marine conditions.

This bilge pump is suitable as a primary bilge pump on boats equal to or greater than 12m (40ft). Output capacity
depends on installation, conditions during use and pumping rate. Users should be aware that capacity may not be
sufficient to cope with rapid influx of water. If it is intended for any other purpose or with any other liquid, it is the
users responsibility to ensure that the pump is suitable for the intended use and, in particular, that the materials are
fully compatible with the liquids to be used.

• The pump is designed to evacuate standing bilge water only. Bilge pump capacities may not be sufficient to
prevent flooding from rapid accumulation of water due to storms, rough weather and/ or rapid leaks created
by hull damage and or unsafe navigational conditions.

• Fitting an inlet strainer will ensure the maximum efficiency of the pump.

• This pump is not for use in systems evacuating water through a skin fitting or seacock below the waterline.
All pipework must contain a corectly installed anti-syphon valve/loop (next page see Fig 3 - Typical
installation diagram).

• Not suitable for pumping flammable liquids, diesel, chemicals etc. Suitable for bilge water only.

• With all applications, it is important that a system of safe working practice is applied to installation, use and
maintenance. Ensure the waste water system is drained before installation. In order to securely fasten the
unit, ensure that the mounting surface is a minimum thickness of 18mm (45/64") as shown in Fig. 4

• NOTE Do not screw directly to the hull - must be mounted on a bulkhead or on an additional board.

1. PRINCIPLES OF OPERATION

4. WARNINGS

2. SPECIFICATION

Model On Deck / Bulkhead

Thru Deck / Bulkhead

(includes deck plate)

Product Code BP3708 BP3740

Hose Connections 38 mm (1 1/2”) Smooth Hose Connections

Weight 2.3 kg (5 lbs)

Materials

Pump Body: Marine Grade LM6 Aluminium Alloy (epoxy coated).

Diaphragm: Neoprene (Nitrile

® option available)

Fasteners: Stainless Steel

Materials In Contact With Fluid

Marine Grade LM6 Aluminium Alloy (epoxy coated).

Neoprene, Nitrile

®, Stainless Steel

Service Kit

AK3706 - Neoprene Parts

AK3714 - Nitrile

® Parts for Oil & Diesel

Contains: Diaphragms, Valves, Gasket

Maximum Suction Lift 4 m (13.5ft)

Maximum Discharge Head 4 m (13.5ft)

3. APPLICATION 

Performance Data

BP3708 / BP3740

BP3708 / BP3740

Suction Lift 1 m (3 ft) 2 m (6 ft)

Discharge Head 0.5 m (1.5 ft) 0.5 m (1.5 ft)

45 Strokes per Minute 41 ltrs (11 US gals) 41 ltrs (11 US gals)

70 Strokes per Minute 65 ltrs (17 US gals) 65 ltrs (17 US gals)

2

1 x Mk3 Gusher® 10 pump
1 x Stainless steel handle
(BP3740 includes deckplate)
1 x Mounting hole template

AS4405 - Spare handle
DP3804 - Metal deckplate & lid
DP8904 - Plastic deck plate
SB5865 - Strum box (top entry)
SB4222 - Strum box (side entry)

Please note that incorrect installation may invalidate the warranty.

LOCATION

Choose a position to mount the pump that is dry and away from standing water and is free from obstacles, where the
pump can be operated efficiently and comfortably. Ensure that the pump is installed to allow easy access for
servicing.

Avoid installation locations which require a cockpit locker to be opened in order to operate the pump.

To ensure good priming and flow:

• Avoid sharp bends in pipework.

• Fit a Whale strumbox / strainer part number SB4222 / SB5865
which prevents the end of the hose sucking against a flat
surface and allows the water level to be reduced to a minimum.

• To minimise pumping effort, site the pump halfway (in height)
between the strumbox / strainer and hull outlet.

• Mount in a position with the shortest run lengths possible.

• Use a reinforced hose on inlet to prevent collapsing during suction.

The Gusher® 10 is designed for mounting on deck / bulkhead (BP3708), or
through deck / bulkhead (BP3740). The handle can be fixed on four different
positions relative to the inlet and outlet (see Fig. 4).

To Reposition Handle:
(a) Slacken wormdrive clip and remove diaphragm
(b) Undo the bolts from bracket and rotate body to new position relative to the fork and diaphragm. Note: Inlet

and outlet are always at 180 degrees to each other

(c) Reassemble bolts, washers and securing brushes in bracket and tighten

6. OPTIONAL EXTRAS

5. PARTS LIST

Fig. 1 Through deck installation

7. INSTALLATION

Fig. 4 Mounting arrangements for a standard model

3

Fig. 2 Incorrect installation Fig 3 - Typical installation diagram

For Mounting On Deck/Bulkhead:

1. Use pump as a template, mark off and drill four 1/4” (6mm) holes.

2. Check flow direction and secure the pump with 1/4” (6mm) bolts.

3. Attach 1 1/2” (38mm) smooth bore reinforced hose with stainless steel worm drive hose
clips. Tighten to prevent air leaks.

4. With thru-hull discharge, make sure that the discharge point is above the maximum heeled
water line.

5. Check the installation for air leaks, correct priming and discharge.

For Mounting Underdeck or Thru Deck/Bulkhead

Two deckplates available - see accessories

1. Using template mark off the 6 holes for the mounting and cut out the hole for the pump handle. To preserve
the gaiter, ensure the top edge of this hole has no sharp edges.

2. Minimum deck thickness required is 1/4” (6mm). For thinner decks use a backing plate of suitable thickness
so that the backing plate plus the deck is at least the minimum thickness and no greater than 1” (25mm).
Bond the backing plate to the deck. If using Deck plate DP3804 the minimum deck thickness is ¹⁄ ” (13mm).

3. Position the pump under deck and check flow direction.
Work the rubber gaiter up through the hole until its flange rests on the deck. Secure the 6 1/4” (6mm)
countersunk mounting screws provided.

4. As points 3 - 5 of previous instructions.

OPERATION

The Gusher® 10 ensures efficient throughput with an easy pumping action. Full even strokes will obtain the best
results. The detachable handle is fitted with a lanyard and should be safely secured close to the pump.

Performance data is based on factory tests and is typical of what may reasonably be achieved. Actual performance
may vary depending on installation and operating conditions.

Fig. 5 Dimensions

Fig. 6 Discharge point

Fig. 7 Deck fitting for Gusher Pumps (Half sectional

elevation of deck fitting, pump and bracket)

4

This Whale Gusher® 10 is designed to only require minimal maintenance.

WARNING: Before servicing pump, drain water from system.

Inspection:

The diaphragms and inlet valves are held in place by the groove in the pump body and cover. Following inspection,
ensure that they are seated properly in the grooves before tightening the covers in place. Regular inspection of the
pump is recommended. Access to the pump chamber is quick and easy, requiring no tools. Rubber components
should be replaced if worn or every three years regardless of condition.
During periodic shipboard inspections, the bilge pump should be visually inspected to confirm parts are in good
condition, especially rubber parts and mounting arrangements. The pump should be operated to show that it pumps
water efficiently.

Annual Checks

• Whale advise that the boat's plumbing system is checked annually for leaks and obstructions.

Optimal Performance

• Ensure this product is clear of debris

It is recommended a service kit is kept on board. These are available from your local chandlery.

Changing the Diaphragm and Valves

1. Slacken and remove the wormdrive clip to release the diaphragm.

2. Release diaphragm nut and remove diaphragm plates and diaphragm.

3. Replace old inlet and outlet valves. Note: both inlet and outlet valves are same shape. The service kits
contain two sets of valves - round ones for the MK 2 pump and square valves for the MK 3 pump. DO NOT
mix the valve types!

4. Replace diaphragm and tighten wormclip in position and test for correct priming and discharge.

Fig. 8 Exploded diagram

8. MAINTENANCE

Body

Handle knob

Tolerance ring

Washer

Eye Bolt

Handle Tube

Lanyard

Buffer

Fork

Locknut

Washer

Bolt

Fulcrum brush and sleeve

Label

Clamping plate

Worm Drive Clip

Diaphragm

Nut

Bridge
piece

Screw

Bolt M6

Valve

Securing brush

Nut

Screw

Valve plate

Gasket

Bracket

Fork liner

Clamping plate

Fulcrum brush and sleeve

5

Note: Annually at the end of the season, fully drain all water in the pipework and pump chamber. Whale® cannot
guarantee warranty if the system is not fully drained for winterising.

Service kits available: AK3706 and AK3714
For installation or service advice please contact Whale® Customer Support:

Tel: [phone]
Email: [e-mail]
www.whalepumps.com

This product complies with all relevant European directives and standards. Please contact Whale® if further details
are required

Manufacturer’s Declaration

We hereby declare, under our sole responsibility, that the enclosed equipment complies with the international
standard EN ISO 15083:2003 - Small craft-bilge pumping systems.

Engineering Director
Date: October 2016

WHALE® and GUSHER® are registered trademarks of Munster Simms Engineering Limited, Bangor, Northern
Ireland trading as Whale.

This Whale® product is covered by a 5 year warranty. Please see the enclosed document for details of our
Statement of Limited Warranty.

©Copyright Whale 2017 - All rights reserved. Reproduction in whole or in part without permission is prohibited.
WHALE® is a registered trademark of Munster Simms Engineering Limited, Bangor, Northern Ireland trading as
Whale. Whale’s policy is one of continuous improvement and we reserve the right to change specifications without
prior notice. Illustrations are for guidance purposes only. Neither the accuracy nor completeness of the information
contained in any Product brochure is guaranteed by the Company and may be subject to change at its sole discre­tion.

Please note that by contacting Whale Support you will be indicating your consent to receiving product updates,
recall information, help guides and appropriate marketing messages from us via post, email or telephone unless you
indicated an objection to receiving such messages.

10. WINTERISING

9. TROUBLE SHOOTING

13. PATENTS AND TRADEMARKS

14. WARRANTY

Fails to prime

Inlet hose fault

Check inlet hose connection is airtight, free from blockages and does not
collapse during suction stroke

Diaphragm failure If damaged replace all rubber parts (see Service kits)

Debris in the body
of the pump

May not prevent its operation but should be removed to prevent
damage

Inlet and/or
outlet valve failure

Inspect and remove any debris. If damaged replace (see Service kits)

USA Tel: [phone]
USA Fax: [phone]
Email USA: [e-mail]
www.whalepumps.com

11. SERVICE SUPPORT DETAILS

12. DECLARATION OF CONFORMITY, STANDARDS AND APPROVALS

6

Munster Simms Engineering Ltd.
2 Enterprise Road, Bangor, N. Ireland BT19 7TA
Tel: [phone]
whalepumps.com [e-mail]

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