Mercury outboard spare part 18778T (GROMMET). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 175 HP V6 CYL (2.5L), V-150 HP (2.5L), V-200 (2.5L), V-150, 115 HP V6 CYL (2.5L), 150 HP Pro XS 6 CYL (2.5L). Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 18778T (GROMMET), documented in 8 exploded diagram location(s), across the 2-STROKE-DFI-OPTIMAX, 2-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 2-STROKE-DFI-OPTIMAX115-hp-v6-cyl-2-5l0G960500 THRU 0T178499354View
Mercury 2-STROKE-DFI-OPTIMAX150-hp-pro-xs-6-cyl-2-5l1B690542 THRU 2B535572354View
Mercury 2-STROKE-DFI-OPTIMAX175-hp-v6-cyl-2-5l0T178500 THRU 0T800999344View
Mercury 2-STROKE-DFI-OPTIMAX175-hp-v6-cyl-2-5l0T801000 THRU 1B226999344View
Mercury 2-STROKE-EFIv-150-hp-2-5l0T801000 THRU 1B226999344View
Mercury 2-STROKE-EFIv-150-hp-2-5l1B227000 THRU 2B121048344View
Mercury 2-STROKE-EFIv-200-2-5l0T801000 THRU 1B226999344View
Mercury 2-STROKE-EFIv-200-2-5l1B227000 THRU 2B121048344View

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Appears in diagrams of these models

  • 175 HP V6 CYL (2.5L)
  • V-150 HP (2.5L)
  • V-200 (2.5L)
  • V-150
  • 115 HP V6 CYL (2.5L)
  • 150 HP Pro XS 6 CYL (2.5L)