Volvo Penta Mechanical Fuel Lift Pump 859428 | 2001 2002 2003 Series | Later Production

Part Number: 859428
Brand: Volvo Penta (OEM Genuine)
Official Part Name: Fuel Pump
Type: Mechanical fuel lift / feed pump

Genuine Volvo Penta 859428 is a mechanical diesel fuel lift pump used on later-production Volvo Penta 2001, 2002, and 2003-series compact inboard marine diesel engines. It supplies fuel from the tank through the low-pressure side of the fuel system toward the injection equipment. Application references consistently identify 859428 with the later fuel pump arrangement on these engines, with one detailed reference specifying the change point at engine serial number 2300046825 and later.

⚠️ Serial Number Fitment Notice: The 2001/2002/2003 engine family used more than one mechanical fuel pump configuration during production. 859428 applies to the later version. Always confirm fitment by engine serial number and the applicable Volvo Penta fuel system parts diagram before ordering.

Compatible Applications

• Volvo Penta 2001
• Volvo Penta 2001AG
• Volvo Penta 2001B
• Volvo Penta 2001BG
• Volvo Penta 2001D
• Volvo Penta 2001R
• Volvo Penta 2002
• Volvo Penta 2002AG
• Volvo Penta 2002B
• Volvo Penta 2002BG
• Volvo Penta 2002D
• Volvo Penta 2003
• Volvo Penta 2003AG
• Volvo Penta 2003B
• Volvo Penta 2003B SOLAS
• Volvo Penta 2003BG
• Volvo Penta 2003D
• Volvo Penta 2003R
• Volvo Penta 2003R SOLAS
• Volvo Penta 2003T
• Volvo Penta 2003TB
• Volvo Penta 2003TB SOLAS
• Volvo Penta 2003TR
• Later production only — confirm by engine serial number 2300046825 and up against the fuel system parts diagram

Engine Family: Volvo Penta 2000-series compact inboard marine diesel
System: Fuel — low-pressure lift / feed circuit
Diagram Position: Mechanical fuel lift pump — low-pressure fuel supply, engine-mounted

Superseded / Alternate Part Numbers

• Current OEM: 859428
• No confirmed Volvo Penta OEM superseding number has been verified for this part — do not substitute based on aftermarket cross-references without EPC confirmation

When to Replace

• Difficulty priming the fuel system or repeated loss of fuel prime
• Hard starting caused by insufficient low-pressure fuel delivery
• External diesel leakage from the pump body or fittings
• Internal diaphragm failure or mechanical pump wear confirmed during diagnosis
• Fuel starvation symptoms after fuel lines, filters, tank pickup, and air leaks have been eliminated

Service Interval
Mechanical lift pumps do not have a fixed replacement interval but should be inspected during annual engine servicing. Replace on condition — any signs of leakage, poor delivery, or diaphragm deterioration are cause for immediate replacement.

Installation Notes

• Isolate the fuel supply and clean the pump mounting area before removal
• Inspect fuel hoses, fittings, mounting surface, and any gasket or sealing components disturbed during replacement
• After installation, prime and bleed the fuel system per the applicable Volvo Penta procedure
• Check all connections carefully for leakage before returning the engine to service
• Confirm the replacement pump matches the late-production configuration for your engine serial number

Technical FAQ

How do I know if 859428 is the right pump for my engine?
Check the engine serial number. Application references place the 859428 configuration at serial number 2300046825 and later across the 2001/2002/2003 family. If your serial number falls below this point, the engine may require an earlier pump variant — consult the Volvo Penta parts diagram for your specific serial range.

Can I use an aftermarket cross-reference for this pump?
Exercise caution. Some aftermarket catalogs cross-reference other numbers to 859428, while others show those same numbers as belonging to a different, broader pump family used across additional Volvo Penta MD-series engines. Confirm any substitution against the Volvo Penta EPC before ordering.

What symptoms indicate the lift pump needs replacement?
Common signs include hard starting, fuel starvation under load, repeated loss of fuel prime after bleeding, and visible diesel leakage from the pump. Always eliminate other causes — clogged filters, air leaks, tank pickup issues — before condemning the pump.

Parts Desk Insights
The early-versus-late production distinction is the most important detail with this part. Customers ordering by engine model alone — “2002” or “2003” — can end up with the wrong pump if they do not check the serial number. The serial break at 2300046825 should always be confirmed before processing the order. Also worth noting at the counter: some aftermarket catalogs list additional numbers alongside 859428, but those cross-references are not confirmed Volvo Penta OEM supersessions and should not be used as substitutes without EPC verification. If a customer is replacing the pump due to a fuel starvation complaint, it is worth asking whether the fuel filters and lift pump strainer have already been serviced — a clogged filter is a common cause of the same symptoms and is a much less expensive fix.

Related Parts

• Volvo Penta Fuel Feed Pump Gasket 3501530 | OEM MD TMD TAMD KAD — sealing gasket for fuel pump service
• Volvo Penta Injection Pump 3581917 — high-pressure injection pump, special order
• Volvo Penta Glow Plug Sealing Ring 859211 | AD31 AD41 TAMD31 TAMD41
• Volvo Penta Aftercooler Gasket 859196 – AQAD40 / TAMD40