Mercury MerCruiser Quicksilver Mechanical Fuel Pump 8M0112244 | 6.7L Diesel

Mercury MerCruiser Quicksilver Mechanical Fuel Pump 8M0112244

• Part Number: 8M0112244
• Brand: Mercury Marine / MerCruiser / Quicksilver
• Official Product Type: Mechanical Fuel Pump
• Pump Type: Mechanical (engine-driven, low-pressure diesel supply)
• System: Fuel System – Mechanical Pump and Fittings
• Supersedes: No confirmed earlier Mercury number — 8M0112244 is the current part
• Replaced By: No confirmed supersession — 8M0112244 is current
• GTIN / UPC: 745061138926
• Quantity: 1

What This Part Does

The Mercury Marine 8M0112244 is a genuine OEM mechanical fuel pump for selected Mercury Marine 6.7L diesel engines. It is positioned in the Fuel System – Mechanical Pump and Fittings assembly, where it provides low-pressure fuel supply through the engine’s diesel fuel circuit.

Important: This is a mechanical diesel fuel pump. It is not interchangeable with Mercury MerCruiser gasoline-engine electric or mechanical fuel pumps. Confirm the engine is a 6.7L diesel before ordering.

Compatible Applications

• Mercury Marine / FPT 6.7L L6 diesel engines
• Mercury Marine 6.7L-200 TC sterndrive configuration
• Applications where the Mercury parts diagram for the Fuel System – Mechanical Pump and Fittings assembly specifies 8M0112244

Confirm the following before ordering:

• Engine model and serial number
• Fuel-system diagram confirms mechanical pump position
• Existing pump part number
• Fuel-line fitting arrangement

When to Replace This Pump

• Fuel delivery is insufficient for engine demand
• Hard starting is traced to low fuel supply pressure
• External fuel leak is present at the pump body or fittings
• Mechanical pump drive is damaged
• Fuel-system testing confirms the pump is not supplying correctly

Before condemning the pump, inspect fuel filters, supply lines, fittings, and tank venting — these are common sources of restricted fuel delivery that can produce identical symptoms.

Installation Notes

• Keep all fuel-system fittings and mating surfaces clean during service
• Replace any disturbed sealing components and O-rings
• Inspect and replace the pump gasket as required
• Prime the fuel system before startup
• Inspect all connections carefully for leaks after startup
• Follow Mercury service manual torque specifications for pump mounting hardware

Related Fittings & Assembly Components

The following parts are documented in the Fuel System – Mechanical Pump and Fittings assembly alongside this pump:

• 22-8M0106108 — Elbow coupling
• 12-8M0112328 — Washer
• 22-8M0112279 — Plug
• 22-8M0106339 — Threaded union
• 22-8M0106486 — M12 × 1.5 threaded union
• 10-8M0112212 — Banjo bolt
• 8M0115157 — Connector
• 10-8M0105968 — Mounting screw
• 25-8M0105762 — O-ring

Technical FAQ

Can I use 8M0112244 on a gasoline MerCruiser engine?
No. This is a mechanical diesel fuel pump for the 6.7L diesel fuel circuit. It is not interchangeable with Mercury MerCruiser gasoline fuel pumps, which use different operating pressures, mounting configurations, and fuel-system designs.

Is this an electric or mechanical pump?
Mechanical. It is engine-driven and provides low-pressure diesel supply. Mercury’s 6.7L diesel system uses this mechanical pump as part of the fuel delivery circuit.

What should I check before replacing the pump?
Inspect fuel filters, supply lines, tank venting, and fittings first. Restricted fuel supply from a clogged filter or kinked line can produce the same symptoms as a failed pump and is far less expensive to address.

Do I need to replace the fittings when replacing the pump?
Inspect all fittings, O-rings, and sealing components during the service. The banjo bolt, O-ring (25-8M0105762), and threaded unions should be inspected and replaced if worn or damaged to prevent post-service fuel leaks.

Related Parts

• Mercury MerCruiser Quicksilver Fuel Filter 864572
• Mercury MerCruiser Fuel Filter Kit 864572A1
• Mercury MerCruiser Filter Kit 8M0046751
• Mercury MerCruiser Fuel Filter 8M0046752
• Mercury Quicksilver Fuel Pump Gasket 27-34213
• Mercury MerCruiser Quicksilver Fuel Pump Rod 35377

Parts Desk Insights

The most important distinction with 8M0112244 is that it is a mechanical diesel pump — not a gasoline MerCruiser fuel pump. Customers occasionally land on this listing while searching for gasoline-engine fuel pumps because it is listed under the broader MerCruiser brand. If the engine is not a 6.7L diesel, this is the wrong pump. For confirmed 6.7L diesel applications, always match by engine serial number and the Fuel System – Mechanical Pump and Fittings diagram before ordering. When replacing this pump, inspect the full fitting set — O-rings and banjo bolt seals are common post-service leak sources if reused.