Piaggio 850055 Diesel Fuel Pump – Quargo and Quargo Diesel 750 (2004-2017)

The Piaggio 850055 diesel fuel pump is the mechanical AC pump that carries diesel from the tank to the injection pump on the Piaggio Quargo. It is intended for the Quargo from 2007 to 2017 and the 750 cc Quargo Diesel from 2004 to 2006. It is not electric: it is operated mechanically by the engine via the lever that rests on the eccentric. The part arrives with the fittings protected by caps and the red gasket already mounted on the dome. Code 850055, new original spare part.

✓ Strengths

• Original Piaggio spare part – the market is full of equivalents citing the 850055 reference for this code: here you will find the part with the manufacturer's code.
• Protected fittings – the two diesel inlet and outlet ports arrive capped, so the internal circuit remains clean until installation (observed from the product photograph).
• Sealing gasket already in place – the red ring between the body and the dome is mounted as standard (observed from the photograph).
• Light alloy body – silver-colored casting with slotted mounting flange and steel control lever (observed from the photograph).
• Typical maintenance part – on older Quargos, the AC pump is among the primary causes of starting difficulties and power loss.

Technical specifications

* data obtained from product photographs, not declared in the Piaggio catalog.
** indicative value: weight is not declared in the catalog. A retailer indicates 0.300 kg for the equivalent pump.

Vehicle compatibility

Are you not sure about the version of your Quargo? Contact us for more information: we will confirm the exact code against your chassis number before you order.

Who is this for?

This is the spare part for those who have a Quargo that struggles to start, loses power under load, or shuts off and has already checked the diesel filter and piping. It is of interest to repair shops that service these work vehicles, as well as tradespeople or florists who use the Quargo every day: for a vehicle that needs to be on the road, installing the original instead of an equivalent avoids having to redo the job after a few months. It is also the right opportunity for those who do not care about the box and want the manufacturer's part at the lowest price.

Frequently asked questions

Does damaged packaging mean the part is used?
No. The pump is new and has never been installed on a vehicle: only the outer cardboard has sustained damage due to warehousing or transport. The spare part inside is intact, with the fittings still capped and the gasket in place.

How do I know if my Quargo's fuel pump needs to be changed?
Typical symptoms include long cranking times, especially when cold, power loss on hills or under full load, sudden shut-offs, and starting difficulties after a long stop. Before replacing it, it is advisable to rule out a clogged diesel filter, dirty pre-filter, and cracked pipes that are sucking in air, as these produce very similar symptoms.

Is this pump an original Piaggio or an equivalent?
It is the original Piaggio spare part with code 850055. There are many compatible pumps on the market with the same reference – RMS, Magneti Marelli, Meat & Doria, and retailer-specific brands – that cost less but are not the manufacturer's part and often have a shorter warranty.

Does it also work on the Porter Diesel?
No, the Porter 1400 Diesel uses a pump with a different code. This 850055 is the code intended for the Quargo from 2004 to 2017. If you have a Porter, write to us with the model and year and we will point you to the correct spare part for your vehicle.