Whale AK9011 Gusher Urchin Nitrile Service Kit

The Whale AK9011 Gusher Urchin Nitrile Service Kit contains the principal replaceable diaphragm-pump components used when servicing compatible Whale Gusher Urchin and Henderson Chimp Mk3 pumps operating with oil, diesel or oily bilge water. The kit includes one diaphragm, one inlet valve, one outlet valve, two small circlips and two large circlips. It is a replacement-parts kit only; the complete pump is not included.

Product Identification

• Brand: Whale
• Product name: Gusher Urchin Nitrile Service Kit
• Manufacturer part number: AK9011
• Marine Scene SKU: MA-AK9011
• Product category: Manual diaphragm-pump service and repair kit
• Service-component material: Nitrile
• Primary pump family: Whale Gusher Urchin
• Additional listed compatibility: Henderson Chimp Mk3
• Intended media: Oil, diesel and oily bilge water
• Alternative clean-bilge-water kit: Whale AK9003 neoprene service kit
• Complete pump included: No

Whale identifies AK9011 as the nitrile version of the Gusher Urchin service kit and distinguishes it from the AK9003 neoprene version used for clean bilge water.

What Is Included in the Service Kit?

• One nitrile diaphragm
• One inlet valve
• One outlet valve
• Two small circlips
• Two large circlips

These components correspond to the principal replaceable diaphragm, valve and lever-retention parts identified in Whale’s Gusher Urchin servicing information.

What Is Not Included?

• Complete Whale Gusher Urchin pump
• Pump body
• Operating handle
• Operating lever or fork assembly
• Fulcrum pin
• Clamping ring
• Inner or outer clamping plates
• Inlet and outlet hose nipples
• Deckplate or gaiter
• Hose, hose clips or installation fittings
• Professional pump servicing

Check the existing pump before ordering. Components outside the listed AK9011 contents may require separate Whale replacement assemblies.

What Is This Service Kit Used For?

The AK9011 is used to replace worn or damaged serviceable components inside compatible Gusher Urchin and Chimp Mk3 manual diaphragm pumps.

Replacement may be required where the pump:

• Does not prime correctly
• Has a torn or hardened diaphragm
• Has dirty, distorted or worn inlet or outlet valves
• Produces reduced or irregular flow
• Requires scheduled replacement of its rubber components
• Is being configured with nitrile service parts for compatible oil, diesel or oily-bilge-water use

Which Pumps Is AK9011 Compatible With?

Whale’s service information cross-references AK9011 to the following pump families and model numbers:

• Whale Gusher Urchin BP9005: on-deck standard or fixed-handle pump
• Whale Gusher Urchin BP9021: on-deck removable-handle pump
• Whale Gusher Urchin BP9013: underdeck or bulkhead pump
• Henderson Chimp Mk3 MH0310: standard or removable-handle configuration
• Henderson Chimp Mk3 MH0340: underdeck configuration

The kit is listed for standard-handle, removable-handle and underdeck Gusher Urchin arrangements. Confirm the model number on the existing pump before ordering, particularly when servicing an older Henderson pump.

Does AK9011 Fit Henderson Chimp Pumps?

Yes, but the documented compatibility is specifically with the Henderson Chimp Mk3 pump family, including the MH0310 and MH0340 references.

AK9011 should not be assumed to fit Henderson Chimp Mk1 or Chimp Mk2 pumps. Whale lists those earlier pump generations separately in its service information.

Why Does This Kit Use Nitrile Components?

Nitrile is the service-material option Whale associates with:

• Oil
• Diesel
• Oily bilge water
• Lubricants

The complete pumping system must also be suitable for the intended liquid. Compatibility cannot be determined from the diaphragm kit alone; hoses, fittings, seals and the pump installation must all be appropriate for the fluid being transferred.

What Is the Difference Between AK9011 and AK9003?

• AK9011: nitrile service kit for oil, diesel and oily bilge water
• AK9003: neoprene service kit identified by Whale for clean bilge water

Both kits service compatible Gusher Urchin pumps, but the diaphragm and valve material is selected according to the pumped liquid. Do not choose the kit solely by pump appearance; confirm both the pump model and intended media.

Does AK9011 Convert the Pump for Diesel Transfer?

The Whale Gusher Urchin product information identifies the nitrile AK9011 service kit as the material option used when upgrading a compatible Gusher Urchin pump for diesel transfer.

This does not automatically confirm the suitability of the entire installation. Before transferring diesel, confirm that:

• The exact pump model is compatible
• The pump is correctly serviced and assembled
• All hoses and fittings are approved for diesel
• The installation follows the current Whale instructions
• The pump is not being used with an unsupported liquid

The available product information supports oil, diesel and oily bilge water applications; it does not establish compatibility with petrol or every chemical fluid.

When Should the Pump Be Serviced?

Whale recommends regular inspection of the pump. Its Gusher Urchin instructions state that rubber components should be replaced:

• When worn or damaged
• Every three years regardless of apparent condition

The pump should also be inspected where it becomes difficult to prime, loses output or shows signs of diaphragm or valve deterioration.

Service and Installation Guidance

• 1. Make the pumping system safe and follow the current pump instructions.
• 2. Release the pinching screw and slacken the clamping ring.
• 3. Remove the circlips from the fulcrum-pin assembly.
• 4. Expose and remove the clamping bolt.
• 5. Remove the old diaphragm, inlet valve and outlet valve.
• 6. Install the corresponding AK9011 replacement components.
• 7. Refit the clamping bolt, lever, fulcrum pin and circlips.
• 8. Reposition and secure the clamping ring.
• 9. Test the pump for leakage, correct priming and unrestricted discharge.

The precise arrangement varies between the standard, removable-handle and underdeck pump versions. Refer to the instructions for the installed model and do not force or modify the replacement components.

Key Features

• Whale replacement service kit
• Manufacturer part number AK9011
• Marine Scene SKU MA-AK9011
• Nitrile diaphragm-pump components
• Intended for compatible oil and diesel applications
• Suitable for oily bilge water
• Fits Whale Gusher Urchin pumps
• Fits documented Henderson Chimp Mk3 models
• Supports standard-handle pump configurations
• Supports removable-handle pump configurations
• Supports underdeck pump configurations
• Includes one diaphragm
• Includes one inlet valve
• Includes one outlet valve
• Includes two small circlips
• Includes two large circlips
• Services the principal rubber and circlip wear components
• AK9003 neoprene kit is the alternative identified for clean bilge water
• Complete pump and structural pump assemblies not included
• Pump model and fluid compatibility must be confirmed before installation

Frequently Asked Questions

What does the Whale AK9011 service kit contain? It contains one diaphragm, one inlet valve, one outlet valve, two small circlips and two large circlips.

Is the complete Gusher Urchin pump included? No. AK9011 is a replacement service kit only.

Is AK9011 made from nitrile? Yes. Whale identifies AK9011 as the nitrile Gusher Urchin service kit.

Is it suitable for oil and diesel? Yes. It is specified for compatible oil, diesel and oily-bilge-water applications. The remaining pump installation must also be compatible with the liquid.

Which Gusher Urchin models does it fit? The documented Whale models are BP9005, BP9013 and BP9021.

Does it fit the Henderson Chimp Mk3? Yes. The documented Chimp Mk3 references are MH0310 and MH0340.

Does it fit Henderson Chimp Mk1 or Mk2 pumps? AK9011 is not documented as their service kit. Confirm the exact pump generation before ordering.

Should AK9011 be used for clean bilge water? Whale identifies AK9003, the neoprene version, for clean bilge water. AK9011 is the nitrile version for oily bilge water and compatible oil or diesel applications.

Does the kit include a new clamping ring or pump handle? No. The kit contains only the listed diaphragm, valves and circlips.

How often should the diaphragm and valves be replaced? Whale recommends replacement when worn or every three years regardless of visible condition.

Can AK9011 be used with petrol? The available product information supports oil, diesel and oily bilge water, but does not establish petrol compatibility.