Piaggio 858506 Complete Fuel Pump – Carnaby 250/300 and Aprilia Sport City 250/300

The Piaggio 858506 fuel pump is the complete pump assembly that works submerged in the tank of 250 and 300 electronic injection scooters from the Piaggio-Aprilia group. The official catalog name is "FUEL PUMP" and it appears under the heading "Fuel Tank" on the diagrams. It is intended for Piaggio Carnaby 250 4T ie and Carnaby 300 4T ie Cruiser, and for Aprilia Sport City Cube 250-300 and Sport City Street 300. It's not just the pump: it's the complete assembly including filter, wiring, and support. Code 858506, new original spare part.

✓ Strengths

• Complete assembly, not just the motor – the supply includes the pump body, filter cartridge, wiring, and support already assembled (observed from the product photograph).
• Original Piaggio spare part – many equivalents and quite a few reconditioned or disassembled parts circulate for this code: here you will find the new part with the manufacturer's code.
• One code for two brands – the same assembly covers Piaggio Carnaby and Aprilia Sport City of the same generation.
• Integrated fuel filter – the filter cartridge is part of the assembly, so replacing the pump also renews the filtration (observed from the photograph).
• Sealing gasket on the fitting – the black ring is already in place on the outlet (observed from the photograph).

Technical specifications

* data observed from the product photograph, not declared in the Piaggio catalog.
** indicative value: weight is not declared in the catalog or by retailers.

Vehicle compatibility

Your scooter is not listed but your mechanic indicated this code? Contact us for more information: we will check the assignment using the VIN before you order.

Who it's perfect for

It's the spare part for those who have a Carnaby or Sport City that won't start, starts hesitantly, or stalls while driving and have already checked the relay, fuse, and spark plug. On these scooters, the submerged pump is a typical failure after a few years, especially if the tank has often been kept on reserve. It's for the workshop that wants to finish the job in one go – pump, filter, and wiring arrive together – and for those who keep a recent classic scooter on the road and prefer a new part to a reconditioned pump of uncertain origin.

Frequently Asked Questions

How do I know if the fuel pump on my Carnaby needs replacing?
The clearest sign is the absence of the pump's hum when you turn the key: if you don't hear it, fuel is not being pressurized. Other symptoms include long cranking times, power drops during acceleration, and sudden stalling. Before replacing it, it's advisable to check the fuse, relay, and connector, which can cause the same symptoms.

Is the filter included in the supply?
Yes. The 858506 is the complete assembly: pump body, filter cartridge, wiring, and support arrive already assembled. You don't need to buy the filter separately or transfer parts from the old assembly: the entire unit is replaced, and the filtration becomes new along with the pump.

Does the same code work for both Piaggio and Aprilia?
Yes. Carnaby 250 and 300 Cruiser, Sport City Cube 250-300, and Sport City Street 300 belong to the same generation of 250-300 injection scooters from the Piaggio-Aprilia group and share the 858506 pump assembly, assigned to the "Fuel Tank" diagram. The exact years are in the compatibility table.

Is it new or reconditioned?
It is new and never mounted, an original Piaggio spare part. For this code, the market is full of used pumps disassembled from vehicles and reconditioned units, which cost less but start from a part that has already been used. If you have doubts about the difference, contact us for more information.