Whale AK8060 Henderson Mk5 Double-Action Pump Service Kit
AK8060
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Whale Mk5 Double-Action Pump Service Kit
Twin-diaphragm Mk5 maintenance kit
The Whale AK8060 service kit provides the principal serviceable components for Mk5 Double-Acting manual pumps. These high-output units use twin diaphragms, so AK8060 contains paired valve, diaphragm and sealing parts for the double-action mechanism.
Key Features
- Genuine Whale kit for the Mk5 Double-Acting range
- Twin diaphragms and paired valve components
- Fits on-deck, under-deck and bulkhead double-action variants listed below
- Includes seals, screws and circlips used during overhaul
- Not interchangeable with the single-action AK8050 kit
Technical Specs
| Manufacturer | Whale |
| Service-kit code | AK8060 |
| Pump type | Mk5 Double-Acting, twin diaphragm |
| Compatible model codes | MH5550; MH5560; MH5570 |
| Inlet valve plates / valves | 2 / 2 |
| Top-cover seals / diaphragms | 2 / 2 |
| Outlet valves | 2 |
| Valve screws | 4 short; 4 long |
| Circlips | 4 small; 2 large |
| 4Boats SKU | AK8060 |
Compatibility / Fitment Guide
| Check | Compatible when | Do not use when |
|---|---|---|
| Pump family | Whale/Henderson Mk5 Double-Acting pump. | Single-action Mk5 Universal BP0510. |
| Model code | MH5550, MH5560 or MH5570 is shown on the pump/manual. | A different MH/BP number is present. |
| Mechanism | Twin-diaphragm, double-action configuration. | Single diaphragm; use the service kit specified for that pump. |
| Repair scope | Diaphragms, valves, seals and associated retaining hardware require renewal. | Rocker arm, clamping plate or housing is damaged; those assemblies are separate parts. |
Part Number Cross Reference
| Whale MPN | AK8060 |
| Double-action models | MH5550; MH5560; MH5570 |
| Single-action Mk5 kit | AK8050 for BP0510 — not interchangeable |
| Rocker arm assembly | AS8551 — separate |
| Clamping plate/nut kit | AS8552 — separate |
| 4Boats SKU | AK8060 |
Use the manufacturer part number and pump/toilet configuration as the primary fitment checks. Similar-looking service kits are not necessarily interchangeable.
Frequently Asked Questions
Will this fit the BP0510 Mk5 Universal?
No. BP0510 is the single-action version and uses AK8050.
Why does this kit contain paired components?
Mk5 Double-Acting pumps have twin diaphragms and paired flow paths.
Does it fit all Henderson Mk5 pumps?
No. Confirm MH5550, MH5560 or MH5570 and the double-action layout.
Are rocker arms included?
No. Rocker-arm and clamping assemblies have separate Whale references.
Before ordering: compare the part number, product label and pump orientation/model with your existing equipment.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
