840481T01 Mercury EFI Fuel Injector – Remanufactured OEM Replacement

Restore the performance and reliability of your Mercury EFI outboard with this remanufactured 840481T01 fuel injector, engineered for 150 HP, 200 HP, 225 HP, and 250 HP models across the 2.5L and 3.0L platforms.

Each injector undergoes a complete multi‑stage restoration process including ultrasonic cleaning, internal component replacement, and dynamic flow testing. This ensures proper atomization, consistent cylinder fueling, and smooth operation under load — critical for EFI Mercury engines.

Ideal for resolving misfires, hesitation, poor fuel economy, and uneven cylinder performance.

Rebuild & Testing Process

• Multi‑stage ultrasonic cleaning

• New O‑rings, seals, and filter baskets

• Leak testing at multiple pressures

• Spray pattern verification

• Dynamic & static flow matching

• Restored to OEM flow specifications

• Key Features

  • Genuine OEM‑spec 840481T01 injector body

  • Direct plug‑and‑play fitment

  • Restored to factory performance

  • Smooth idle and improved throttle response

  • Compatible with pump gas & ethanol‑blended fuels

  • Fitment

    Mercury EFI Outboards (2.5L & 3.0L)

    • 150 HP EFI

    • 200 HP EFI

    • 225 HP EFI

    • 250 HP EFI

    • Direct OEM replacement for part 840481T01

    • Works with OEM Mercury EFI fuel rails and injection systems