881315T05 Mercury Vapour Separator | Genuine Used Part

🔧 Product Description

Genuine Mercury / Mariner EFI Vapour Separator Assembly - Part Number: 881315T05

A genuine Mercury Marine vapour separator assembly for selected Yamaha-derived Mercury and Mariner four-stroke EFI outboards. The assembly maintains the fuel reservoir for the internal high-pressure pump and includes the separator body, cover, float, needle valve, filter and related fuel-system components.

Part number 881315T05 is the later service assembly replacing earlier 881315T1, 881315T2 and 881315T4 versions.

⚙️ Key Features

• Genuine Mercury Marine OEM complete vapour separator assembly
• Correct current service number 881315T05
• Supersedes earlier 881315T1, 881315T2 and 881315T4 assemblies
• Used on selected 75HP to 115HP EFI four-stroke outboards
• Serviceable internal pump, filter, float and needle-valve components

🚤 Compatibility

Commonly used on

• Mercury and Mariner Yamaha-derived inline 4-cylinder EFI four-stroke outboards
• Mercury 75HP, 80HP, 90HP, 100HP and 115HP electronic fuel-injection systems where the 881315-series assembly is specified

Typically suits

• Engine models:
• Mercury / Mariner 75 EFI four-stroke model family using the 881315-series separator
• Mercury 80 EFI four-stroke - serial 1B227000 to 1B366822
• Mercury / Mariner 90 EFI four-stroke model family using the 881315-series separator
• Mercury / Mariner 100 EFI four-stroke model family using the 881315-series separator
• Mercury / Mariner 115 EFI four-stroke - serial 0T178500 to 0T800999
• Mercury / Mariner 115 EFI four-stroke - serial 0T801000 to 1B226999
• Mercury / Mariner 115 EFI four-stroke - serial 1B227000 to 1B366822
• HP Range: 75HP - 115HP
• Engine Type: Mercury / Mariner inline 4-cylinder EFI four-stroke outboard
• Year Range: Approximately 2001 - 2006

🔌 Function

The vapour separator stores and de-aerates fuel, maintains the correct float-controlled level and supplies the internal high-pressure pump that feeds the electronic fuel injectors.

⚠️ Common Signs of Failure

• Engine hesitates, surges or stalls under load
• High-pressure pump fails to prime or produces low pressure
• Hot-start or restart problems develop
• Fuel leaks around the cover, drain, hoses or O-ring
• Restricted filter or sticking needle valve causes starvation or flooding

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 881315T05 → Supersedes 881315T04
• 881315T05 → Supersedes 881315T2
• 881315T05 → Supersedes 881315T1
• 881315T1 earlier OEM vapour separator reference

OEM / Related Numbers

• 881315T05
• 881315T5
• 881315T04
• 881315T4
• 881315T2
• 881315T1
• 881316T2 related separator cover
• 25-881318 related O-ring
• 881329 related needle valve kit
• 881320 related float
• 17-881321 related float pin
• 881319T related separator body
• 27-881325 related gasket
• 8M0123823 later internal fuel pump
• 880889T01 earlier internal fuel pump
• 35-881323T related filter
• 32-881330A02 related hose kit
• 35-892758002 related filter kit

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

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