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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

Summary of Contents for Gusher 10 Mk3 BP3708

Page 1: ...g 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 tha...

Page 2: ...ion 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...

Page 3: ...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 bulk...

Page 4: ...te 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 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 s...

Page 5: ...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 val...

Page 6: ...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 discre tion Pl...

Page 7: ......

Page 8: ...Munster Simms Engineering Ltd 2 Enterprise Road Bangor N Ireland BT19 7TA Tel 44 0 28 9127 0531 whalepumps com info whalepumps com Ref No db_jw_G10_180 07_v3_0217 ...

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