Mercury outboard spare part 8M0142354 (VALVE Seat, Intake). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 275 HP Verado 6 CYL, 225 HP Verado 6 CYL, 300 HP Verado 6 CYL, 200R HP 3.4L V6 Racing, 300 HP Pro Verado 6 CYL, 350 HP 5.7L V10 Verado, 200 HP 3.4L V6 SeaPro, 200 HP 3.4L V6, 200 HP 4.6L V8 Pro XS, 200 ROS HP 3.4L V6 15 Inch Midsection Racing, 200R HP 3.4L V6 15 Inch Midsection Racing, 250 HP 4.6L V8 Pro XS, 250 HP 4.6L V8 SeaPro, 250 HP 4.6L V8 Verado, 250 HP 4.6L V8, 250R HP 4.6L V8 Racing, 300 HP 4.6L V8 AMS SeaPro, 300 HP 4.6L V8 CMS SeaPro, 300 HP 4.6L V8 CMS, 300 HP 4.6L V8 Pro XS, 300 HP 4.6L V8 Verado, 300 HP 4.6L V8, 300 ROS HP 4.6L V8 15 Inch Midsection Racing, 300R HP 4.6L V8 15 Inch Midsection Racing, 300R HP 4.6L V8 AMS Racing, 300R HP 4.6L V8 Racing, 350 HP 2.6L L6 Pro Verado, 350 HP 2.6L L6 Verado, 350 HP 5.7L V10 Verado SeaPro, 350 HP SCi Verado, 400 HP 2.6L L6 Verado, 400 HP 5.7L V10 Verado, 400R HP 2.6L L6 Racing, 400R HP 5.7L V10 Racing, 425 HP 5.7L V10 Verado, 450R HP 4.6L V8 Racing, 500R HP 4.6L V8 Racing. Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 8M0142354 (VALVE Seat, Intake), documented in 52 exploded diagram location(s), across the 4-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 4-STROKE-EFI200-hp-3-4l-v62B529482 UP212View
Mercury 4-STROKE-EFI200-hp-3-4l-v6-seapro2B529482 UP212View
Mercury 4-STROKE-EFI200-hp-4-6l-v8-pro-xs2B529482 UP212View
Mercury 4-STROKE-EFI200-ros-hp-3-4l-v6-15-inch-midsection-racing1E054618 UP212View
Mercury 4-STROKE-EFI200r-hp-3-4l-v6-15-inch-midsection-racing1E054618 UP212View
Mercury 4-STROKE-EFI200r-hp-3-4l-v6-racing3B547096 UP212View
Mercury 4-STROKE-EFI200r-hp-3-4l-v6-racing3B648748 UP212View
Mercury 4-STROKE-EFI225-hp-verado-6-cyl0P409357 THRU 0P464487212View
Mercury 4-STROKE-EFI225-hp-verado-6-cyl0P464488 THRU 0P520552212View
Mercury 4-STROKE-EFI225-hp-verado-6-cyl0P520553 THRU 2B144122212View
Mercury 4-STROKE-EFI225-hp-verado-6-cyl0T980000 THRU 1B226999212View
Mercury 4-STROKE-EFI250-hp-4-6l-v82B529482 UP216View
Mercury 4-STROKE-EFI250-hp-4-6l-v8-pro-xs2B529482 UP216View
Mercury 4-STROKE-EFI250-hp-4-6l-v8-seapro2B529482 UP216View
Mercury 4-STROKE-EFI250-hp-4-6l-v8-verado2B529482 UP216View
Mercury 4-STROKE-EFI250r-hp-4-6l-v8-racing1E080500 UP216View
Mercury 4-STROKE-EFI275-hp-verado-6-cyl0P409357 THRU 0P464487216View
Mercury 4-STROKE-EFI275-hp-verado-6-cyl0P464488 THRU 0P520552216View
Mercury 4-STROKE-EFI275-hp-verado-6-cyl0P520553 THRU 2B144122216View
Mercury 4-STROKE-EFI275-hp-verado-6-cyl0T980000 THRU 1B226999216View
Mercury 4-STROKE-EFI275-hp-verado-6-cyl1B227000 THRU 1B381711216View
Mercury 4-STROKE-EFI275-hp-verado-6-cyl1B381712 THRU 1B517433216View
Mercury 4-STROKE-EFI275-hp-verado-6-cyl1B517434 THRU 2B144122216View
Mercury 4-STROKE-EFI275-hp-verado-6-cyl2B144123 THRU 2B578935216View
Mercury 4-STROKE-EFI300-hp-4-6l-v82B529482 UP216View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-ams-seapro2B529482 UP216View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-cms2B529482 UP216View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-cms-seapro2B529482 UP216View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-pro-xs2B529482 UP216View
Mercury 4-STROKE-EFI300-hp-4-6l-v8-verado2B529482 UP216View
Mercury 4-STROKE-EFI300-hp-pro-verado-6-cyl1B830170 THRU 2B144122216View
Mercury 4-STROKE-EFI300-hp-pro-verado-6-cyl2B144123 THRU 2B577715216View
Mercury 4-STROKE-EFI300-hp-verado-6-cyl0P520553 THRU 2B144122216View
Mercury 4-STROKE-EFI300-hp-verado-6-cyl1B517434 THRU 2B144122216View
Mercury 4-STROKE-EFI300-hp-verado-6-cyl2B144123 THRU 2B578935216View
Mercury 4-STROKE-EFI300-ros-hp-4-6l-v8-15-inch-midsection-racing1E054618 UP216View
Mercury 4-STROKE-EFI300r-hp-4-6l-v8-15-inch-midsection-racing1E054618 UP216View
Mercury 4-STROKE-EFI300r-hp-4-6l-v8-ams-racing1E081459 UP216View
Mercury 4-STROKE-EFI300r-hp-4-6l-v8-racing1E080500 UP216View
Mercury 4-STROKE-EFI350-hp-2-6l-l6-pro-verado2B141124 THRU 3B342962216View
Mercury 4-STROKE-EFI350-hp-2-6l-l6-verado2B141617 THRU 3B342962216View
Mercury 4-STROKE-EFI350-hp-5-7l-v10-verado3B266064 THRU 3B576448216View
Mercury 4-STROKE-EFI350-hp-5-7l-v10-verado3B576449 UP216View
Mercury 4-STROKE-EFI350-hp-5-7l-v10-verado-seapro3B266064 UP216View
Mercury 4-STROKE-EFI350-hp-sci-verado1B716557 THRU 2B143542216View
Mercury 4-STROKE-EFI400-hp-2-6l-l6-verado2B618256 THRU 3B342962216View
Mercury 4-STROKE-EFI400-hp-5-7l-v10-verado3B266064 UP216View
Mercury 4-STROKE-EFI400r-hp-2-6l-l6-racing2B141124 THRU 3B342962216View
Mercury 4-STROKE-EFI400r-hp-5-7l-v10-racing3B272954 UP216View
Mercury 4-STROKE-EFI425-hp-5-7l-v10-verado3B576447 UP216View
Mercury 4-STROKE-EFI450r-hp-4-6l-v8-racing1E083006 THRU 1E099720216View
Mercury 4-STROKE-EFI500r-hp-4-6l-v8-racing1E099432 UP216View

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Appears in diagrams of these models

  • 275 HP Verado 6 CYL
  • 225 HP Verado 6 CYL
  • 300 HP Verado 6 CYL
  • 200R HP 3.4L V6 Racing
  • 300 HP Pro Verado 6 CYL
  • 350 HP 5.7L V10 Verado
  • 200 HP 3.4L V6 SeaPro
  • 200 HP 3.4L V6
  • 200 HP 4.6L V8 Pro XS
  • 200 ROS HP 3.4L V6 15 Inch Midsection Racing
  • 200R HP 3.4L V6 15 Inch Midsection Racing
  • 250 HP 4.6L V8 Pro XS
  • 250 HP 4.6L V8 SeaPro
  • 250 HP 4.6L V8 Verado
  • 250 HP 4.6L V8
  • 250R HP 4.6L V8 Racing
  • 300 HP 4.6L V8 AMS SeaPro
  • 300 HP 4.6L V8 CMS SeaPro
  • 300 HP 4.6L V8 CMS
  • 300 HP 4.6L V8 Pro XS
  • 300 HP 4.6L V8 Verado
  • 300 HP 4.6L V8
  • 300 ROS HP 4.6L V8 15 Inch Midsection Racing
  • 300R HP 4.6L V8 15 Inch Midsection Racing
  • 300R HP 4.6L V8 AMS Racing
  • 300R HP 4.6L V8 Racing
  • 350 HP 2.6L L6 Pro Verado
  • 350 HP 2.6L L6 Verado
  • 350 HP 5.7L V10 Verado SeaPro
  • 350 HP SCi Verado
  • 400 HP 2.6L L6 Verado
  • 400 HP 5.7L V10 Verado
  • 400R HP 2.6L L6 Racing
  • 400R HP 5.7L V10 Racing
  • 425 HP 5.7L V10 Verado
  • 450R HP 4.6L V8 Racing
  • 500R HP 4.6L V8 Racing