Mercury outboard spare part 8M0204650 (O-RING). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 115 HP EFI, 300R HP 4.6L V8 Racing, 150R HP 3.4L V6, 200 ROS HP 3.4L V6 15 Inch Midsection Racing, 200R HP 3.4L V6 15 Inch Midsection Racing, 200R HP 3.4L V6 Racing, 175 HP 3.4L V6 Pro XS, 175 HP 3.4L V6, 200 HP 3.4L V6 APX, 200 HP 3.4L V6 SeaPro, 200 HP 3.4L V6, 200 HP 4.6L V8 Pro XS, 225 HP 3.4L V6, 225 HP 4.6L V8 Pro XS, 225 HP 4.6L V8 SeaPro, 300 HP 4.6L V8 CMS, 300R HP 4.6L V8 15 Inch Midsection Racing, 100 HP EFI, 105 HP EFI Jet, 115 HP EFI Pro XS, 115 HP EFI SeaPro, 135 HP EFI, 150 HP EFI Pro XS, 150 HP EFI SeaPro, 150 HP EFI, 250 4.6L V8 APX, 300 HP 4.6L V8 AMS SeaPro, 300 HP 4.6L V8 CMS SeaPro, 300R HP 4.6L V8 AMS Racing. Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 8M0204650 (O-RING), documented in 53 exploded diagram location(s), across the 4-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 4-STROKE-EFI100-hp-efi2B095049 UP121View
Mercury 4-STROKE-EFI105-hp-efi-jet3B672358 UP121View
Mercury 4-STROKE-EFI115-hp-efi-pro-xs2B225488 UP121View
Mercury 4-STROKE-EFI115-hp-efi-seapro2B095049 UP121View
Mercury 4-STROKE-EFI135-hp-efi2B131942 UP121View
Mercury 4-STROKE-EFI150-hp-efi1B905505 UP121View
Mercury 4-STROKE-EFI150-hp-efi-pro-xs2B550139 UP121View
Mercury 4-STROKE-EFI150-hp-efi-seapro2B139139 UP121View
Mercury 4-STROKE-EFI150r-hp-3-4l-v63B547096 UP19, 281, 2View
Mercury 4-STROKE-EFI150r-hp-3-4l-v63B648748 UP19, 281, 2View
Mercury 4-STROKE-EFI175-hp-3-4l-v62B529482 UP20, 291, 2View
Mercury 4-STROKE-EFI175-hp-3-4l-v6-pro-xs2B529482 UP20, 291, 2View
Mercury 4-STROKE-EFI200-hp-3-4l-v62B529482 UP20, 291, 2View
Mercury 4-STROKE-EFI200-hp-3-4l-v6-apx1E054353 UP20, 291, 2View
Mercury 4-STROKE-EFI200-hp-3-4l-v6-seapro2B529482 UP20, 291, 2View
Mercury 4-STROKE-EFI200-hp-4-6l-v8-pro-xs2B529482 UP20, 291, 2View
Mercury 4-STROKE-EFI200-ros-hp-3-4l-v6-15-inch-midsection-racing1E054618 UP-, 17, 20, 291, 2View
Mercury 4-STROKE-EFI200r-hp-3-4l-v6-15-inch-midsection-racing1E054618 UP-, 17, 20, 291, 2View
Mercury 4-STROKE-EFI200r-hp-3-4l-v6-racing3B547096 UP20, 291, 2View
Mercury 4-STROKE-EFI200r-hp-3-4l-v6-racing3B648748 UP20, 291, 2View
Mercury 4-STROKE-EFI225-hp-3-4l-v62B529482 UP20, 291, 2View
Mercury 4-STROKE-EFI225-hp-4-6l-v8-pro-xs2B529482 UP20, 291, 2View
Mercury 4-STROKE-EFI225-hp-4-6l-v8-seapro2B529482 UP20, 291, 2View
Mercury 4-STROKE-EFI250-4-6l-v8-apx1E054548 UP291View
Mercury 4-STROKE-EFI250-hp-4-6l-v82B529482 UP19, 281, 2View
Mercury 4-STROKE-EFI250-hp-4-6l-v8-verado2B529482 UP19, 281, 2View
Mercury 4-STROKE-EFI250r-hp-4-6l-v8-racing1E080500 UP20, 301, 2View
Mercury 4-STROKE-EFI300-hp-4-6l-v82B529482 UP291View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-ams-seapro2B529482 UP291View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-cms2B529482 UP19, 281, 2View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-cms-seapro2B529482 UP291View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-pro-xs2B529482 UP291View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-verado2B529482 UP291View
Mercury 4-STROKE-EFI300-ros-hp-4-6l-v8-15-inch-midsection-racing1E054618 UP17, 291View
Mercury 4-STROKE-EFI300r-hp-4-6l-v8-15-inch-midsection-racing1E054618 UP17, 291View
Mercury 4-STROKE-EFI300r-hp-4-6l-v8-ams-racing1E081459 UP291View
Mercury 4-STROKE-EFI300r-hp-4-6l-v8-racing1E080500 UP20, 301, 2View
Mercury 4-STROKE-EFI350-hp-5-7l-v10-verado3B266064 THRU 3B576448-, 291View
Mercury 4-STROKE-EFI350-hp-5-7l-v10-verado3B576449 UP-, 291View
Mercury 4-STROKE-EFI350-hp-5-7l-v10-verado-seapro3B266064 UP-, 291View
Mercury 4-STROKE-EFI360-hp-4-6l-v8-apx1E054247 UP291View
Mercury 4-STROKE-EFI400-hp-5-7l-v10-verado3B266064 UP-, 291View
Mercury 4-STROKE-EFI400r-hp-5-7l-v10-racing3B272954 UP-, 291View
Mercury 4-STROKE-EFI425-hp-5-7l-v10-verado3B576447 UP-, 291View
Mercury 4-STROKE-EFI450r-hp-4-6l-v8-racing1E083006 THRU 1E099720291View
Mercury 4-STROKE-EFI500r-hp-4-6l-v8-racing1E099432 UP291View
Mercury 4-STROKE-EFI65-hp-efi-jet2B095049 UP121View
Mercury 4-STROKE-EFI75-hp-efi2B095049 UP121View
Mercury 4-STROKE-EFI75-hp-efi-seapro2B095049 UP121View
Mercury 4-STROKE-EFI80-hp-efi2B095049 UP121View
Mercury 4-STROKE-EFI80-hp-efi-jet2B095049 UP121View
Mercury 4-STROKE-EFI90-hp-efi2B095049 UP121View
Mercury 4-STROKE-EFI90-hp-efi-seapro2B095049 UP121View

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Appears in diagrams of these models

  • 115 HP EFI
  • 300R HP 4.6L V8 Racing
  • 150R HP 3.4L V6
  • 200 ROS HP 3.4L V6 15 Inch Midsection Racing
  • 200R HP 3.4L V6 15 Inch Midsection Racing
  • 200R HP 3.4L V6 Racing
  • 175 HP 3.4L V6 Pro XS
  • 175 HP 3.4L V6
  • 200 HP 3.4L V6 APX
  • 200 HP 3.4L V6 SeaPro
  • 200 HP 3.4L V6
  • 200 HP 4.6L V8 Pro XS
  • 225 HP 3.4L V6
  • 225 HP 4.6L V8 Pro XS
  • 225 HP 4.6L V8 SeaPro
  • 300 HP 4.6L V8 CMS
  • 300R HP 4.6L V8 15 Inch Midsection Racing
  • 100 HP EFI
  • 105 HP EFI Jet
  • 115 HP EFI Pro XS
  • 115 HP EFI SeaPro
  • 135 HP EFI
  • 150 HP EFI Pro XS
  • 150 HP EFI SeaPro
  • 150 HP EFI
  • 250 4.6L V8 APX
  • 300 HP 4.6L V8 AMS SeaPro
  • 300 HP 4.6L V8 CMS SeaPro
  • 300R HP 4.6L V8 AMS Racing