8M0118177 Mercury/Yamaha Fuel Pump | Genuine Used Part

🔧 Product Description

Genuine Mercury EFI Low-Pressure Electric Fuel Pump - Part Number: 8M0118177

A genuine used Mercury low-pressure electric fuel pump for selected 30HP to 60HP EFI four-stroke outboards.

The pump supplies fuel from the engine filter system to the vapour separator or high-pressure injection pump. Although sometimes marketed as a Mercury / Yamaha pump, no separate Yamaha OEM service number has been verified for this exact assembly.

⚙️ Key Features

• Genuine Mercury Marine electric fuel pump
• Original service number 8M0118177
• Used on three-cylinder and four-cylinder EFI engines
• Supplies the low-pressure fuel circuit
• Multiple genuine and aftermarket replacements available

🚤 Compatibility

Commonly used on

• Mercury and Mariner EFI four-stroke outboards
• Three-cylinder 30HP and 40HP EFI systems
• Four-cylinder 40HP, 50HP and 60HP EFI systems
• EFI Jet and SeaPro variants using the same pump family

Typically suits

• Mercury 30 EFI
• Mercury 30 EFI Jet
• Mercury 40 EFI three-cylinder
• Mercury 40 EFI four-cylinder
• Mercury 40 EFI Jet
• Mercury 45 Jet
• Mercury 50 EFI
• Mercury 55 SeaPro
• Mercury 60 EFI
• Mercury 60 SeaPro
• HP Range: 30HP - 60HP
• Engine Type: Electronic fuel-injected four-stroke outboard
• Current-Pump Serial Guidance: 8M0141827 is specified on many 30HP-60HP EFI engines from serial 1C453840 and above
• Earlier Fitment: 0P and 1C serial groups using 899106T01, 892874T01, 881862T08 or 8M0118177
• Fitment Requirement: Verify the engine serial number and electrical connector

🔌 Function

The pump maintains low-pressure fuel delivery to the vapour separator so the high-pressure injection system receives a steady supply.

⚠️ Common Signs of Failure

• Extended cranking or no start
• Engine stalls as the vapour separator empties
• Loss of power under load
• Pump does not run when energised
• Low fuel-pressure fault or lean-running condition

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 8M0145465 → Supersedes 8M0141827
• 8M0141827 → Supersedes 8M0118177
• 8M0118177 → Supersedes 899106T01
• 899106T01 earlier fuel-pump assembly

OEM / Related Numbers

• 8M0118177
• 8M0141827
• 8M0145465
• 899106T01
• 892874T01
• 881862T
• 881862T08
• 883520A1
• 8M4504411

Aftermarket / Verified Equivalents

• Sierra: 18-8866
• Engineered Marine Products: 1399-39544
• Pro Marine: 9106P
• Fuel Pump Factory: FP-1063
• WDRK: WT-1063
• FridayParts replacement pump for the 8M0118177 family

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated