Prepared by: TED Rev. #: 13
Approved by: MCR 2 15May2006
© W.S. Darley & Co. 1200569.doc
Introduction to the
Darley 2BE6.5H
Portable Pump
The Darley 2BE6.5H portable dewatering/fire pump unit is manufactured by W.S. Darley & Company
in Chippewa Falls, WI, U.S.A. It consists of the Darley 2BE pump coupled to a 6.5 horsepower Honda GX-
200 gasoline engine, and is mounted on an aluminum frame for easy transport to the scene of the emergency.
The dewatering kit consists of
• The pump engine unit,
• A 15’ long, 3” diameter suction hose with quick disconnect fitting, and screen,
• A 20’ long, 3” diameter fiber reinforced discharge hose with quick disconnect fitting,
• A removable, 3 gal. portable fuel tank, (four hour capacity)
• A flashlight,
• A laminated instruction card in four languages,
• An operation and maintenance manual, and
• A spare pull rope for starting the engine without the recoil starter.
This equipment is designed to fit in the Coast Guard dewatering pump kit container. The pump/engine
unit weighs less than 60 pounds, and the complete kit, with fuel, weighs less than 120 pounds.
The operation of the Darley 2BE6.5H is simple. The suction and discharge hoses connect to the pump
via quick disconnect camlock style fittings. The different colored fittings used on the suction and discharge
hoses assist in preventing misconnection of the hoses. The four cycle Honda engine runs on regular unleaded
fuel and is easily started. A throttle control allows the operator the ability to adjust the dewatering rate to
meet the needs of the emergency. At full throttle, the pump is capable of delivering over 250 gallons per
minute at a 12’ suction lift. Higher discharge rates will be achieved at lower suction lifts.
The Darley 2BE6.5H utilizes a mechanical pump shaft seal that is a double lip seal. This seal was
chosen because of its performance and ability to survive losses of suction, and still deliver water at rated
capacity even when damaged. While the seal will require replacement after hundreds of hours of operation
(the seal is a normal wear item in pumps), its ability to operate in a damaged condition makes it a better
choice than other mechanical seal designs.
Stainless steel and other marine grade alloys have been used in the construction and assembly of the
Darley 2BE6.5H pump. The pump features an integrated discharge check valve that aids in priming and
operating the unit. If the unit is stopped while dewatering, the pump will remain primed as long as the suction
hose strainer is submerged. The manual, positive-displacement priming pump provides quick and easy
priming in less than a minute at a 12’ suction lift.
The 6.5 horsepower GX-200 Honda engine is commercially available at local engine shops. The
engine incorporates overhead valve technology and reduced maintenance features. A quick disconnect fuel
fitting provides for rapid and easy fuel tank changing without stopping the engine. Testing has proven the
engine to be easy to start and operate, even after extensive environmental exposure. Most of the maintenance
on the engine is condition based instead of time or interval based, which minimizes preventive maintenance.
Notice:
The wire that typically connects the low oil level
float to the engine ignition has been intentionally disabled
to prevent the engine from cutting out or stalling in rough
water.
This wire is to
be removed,
as shown here
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