Mercury outboard spare part 8M0166531 (GEARCASE SEAL KIT). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 450R HP 4.6L V8 Racing, 300 ROS HP 4.6L V8 15 Inch Midsection Racing, 300R HP 4.6L V8 15 Inch Midsection Racing, 200 ROS HP 3.4L V6 15 Inch Midsection Racing, 200R HP 3.4L V6 15 Inch Midsection Racing. Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 8M0166531 (GEARCASE SEAL KIT), documented in 5 exploded diagram location(s), across the 4-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 4-STROKE-EFI200-ros-hp-3-4l-v6-15-inch-midsection-racing1E054618 UP-1View
Mercury 4-STROKE-EFI200r-hp-3-4l-v6-15-inch-midsection-racing1E054618 UP-1View
Mercury 4-STROKE-EFI300-ros-hp-4-6l-v8-15-inch-midsection-racing1E054618 UP-1View
Mercury 4-STROKE-EFI300r-hp-4-6l-v8-15-inch-midsection-racing1E054618 UP-1View
Mercury 4-STROKE-EFI450r-hp-4-6l-v8-racing1E083006 THRU 1E099720-1View

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Appears in diagrams of these models

  • 450R HP 4.6L V8 Racing
  • 300 ROS HP 4.6L V8 15 Inch Midsection Racing
  • 300R HP 4.6L V8 15 Inch Midsection Racing
  • 200 ROS HP 3.4L V6 15 Inch Midsection Racing
  • 200R HP 3.4L V6 15 Inch Midsection Racing