Whale AK8050 Mk5 Universal BP0510 Single-Action Pump Service Kit
W-AK8050
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Whale Mk5 Universal Pump Service Kit
For single-diaphragm Mk5 Universal BP0510
The genuine Whale AK8050 kit supplies the main serviceable diaphragm, valve and retaining components for the Mk5 Universal single-action manual pump BP0510. It is intended for routine overhaul of the fluid-moving components while retaining the existing pump body and operating mechanism.
Key Features
- Genuine Whale service kit for BP0510
- For the single-action Mk5 Universal mechanism
- Services the diaphragm, inlet/outlet valves and retaining hardware
- Suitable for BP0510's on-deck, through-deck or bulkhead mounting options
- Clearly separated from the twin-diaphragm AK8060 kit
Technical Specs
| Manufacturer | Whale |
| Service-kit code | AK8050 |
| Compatible pump | Mk5 Universal BP0510 |
| Action | Single-action / single diaphragm |
| Main service parts | Diaphragm, inlet valve, outlet valve and circlips |
| Hose size of parent pump | 38mm (1-1/2in) |
| 4Boats SKU | W-AK8050 |
Compatibility / Fitment Guide
| Check | Compatible when | Do not use when |
|---|---|---|
| Pump model | The pump is marked BP0510 Mk5 Universal. | MH5550, MH5560 or MH5570 Mk5 Double-Acting pump. |
| Mechanism | Single diaphragm / single-action Mk5 arrangement. | Twin diaphragms and double-action manifolds. |
| Mounting | Any BP0510 installation orientation, provided the pump code matches. | Selecting by mounting style alone without checking BP0510. |
| Repair scope | Diaphragm, valves or circlips require renewal. | Handle, rocker arm, front cover, body or deckplate is damaged; those assemblies are separate. |
Part Number Cross Reference
| Whale MPN | AK8050 |
| Compatible pump | BP0510 Mk5 Universal |
| Double-action service kit | AK8060 for MH5550 / MH5560 / MH5570 |
| Spare handle | AS0511 — separate |
| Rocker-arm assemblies | AS0521 / AS0531 — separate, by installation |
| 4Boats SKU | W-AK8050 |
Fitment is determined by the Whale/Henderson pump model and service-kit reference. Similar-looking kits for other pump generations are not interchangeable.
Frequently Asked Questions
Can I use two AK8050 kits on a double-action Mk5?
No. Whale specifies AK8060 for the double-action models; it contains the paired components required by that mechanism.
Does mounting orientation change the service kit?
No for BP0510. The same pump can be installed in several orientations, but the model code must still be BP0510.
Is a handle included?
No. The handle and structural operating assemblies are separate Whale parts.
How do I confirm single action?
Check for model BP0510 and one diaphragm. Double-action Mk5 pumps carry MH model codes and use twin diaphragms.
Before ordering: read the model code from the pump and compare it with the references above and the service diagram.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
