Mercury outboard spare part 815434 (NUT). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 225 (3.0L), 250 (3.0L), 200 HP 6 CYL (3.0L), 225 HP 6 CYL (3.0L), 200 (3.0L), 225 (3.0L), 225 MARATHON (3.0L), 225 SEAPRO (3.0L), 225 HP Pro XS 6 CYL (3.0L), 250 HP Pro XS 6 CYL (3.0L), 250 HP XS 6 CYL (3.0L), 300X (3.0L) PRO MAX, 2.5XS (2.5L), 200 HP DTS 6 CYL (3.0L), 225 HP DTS 6 CYL (3.0L), 225 HP SPORT XS 6 CYL (2.5L), 225 HP Sport XS 6 CYL (3.0L), 225 HP XS 6 CYL (2.5L), 150/200 HP PRO MAX/SUPER MAG, 225 (3.0L) MARATHON, 225 (3.0L) SEAPRO, 250 L (3.0L), 250XB (3.0L), 3.0L MARATHON, 3.0L SEAPRO, 300 (3.0L) ProMax. Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 815434 (NUT), documented in 52 exploded diagram location(s), across the 2-STROKE-CARB, 2-STROKE-DFI-OPTIMAX, 2-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 2-STROKE-CARB225-3-0l0D280813 THRU 0G760299142View
Mercury 2-STROKE-CARB225-3-0l0G760300 THRU 0T408999172View
Mercury 2-STROKE-CARB225-marathon-3-0l0G245605 THRU 0G760299142View
Mercury 2-STROKE-CARB225-marathon-3-0l0G760300 THRU 0T408999172View
Mercury 2-STROKE-CARB225-seapro-3-0l0G245605 THRU 0G760299142View
Mercury 2-STROKE-CARB225-seapro-3-0l0G760300 THRU 0T408999172View
Mercury 2-STROKE-DFI-OPTIMAX2-5xs-2-5l0T997974 THRU 1E000796132View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0G386496 THRU 0G589999142View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0G960500 THRU 0T178499142View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0T178500 THRU 0T598999142View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0T599000 THRU 0T800999142View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0T801000 THRU 1B417701142View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-dts-6-cyl-3-0l0T980000 THRU 1B417701142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0G960500 THRU 0T178499142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0T178500 THRU 0T598999142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0T599000 THRU 0T800999142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0T801000 THRU 1B417701142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-dts-6-cyl-3-0l0T599000 THRU 1B417701142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-pro-xs-6-cyl-3-0l1B104549 THRU 1B426560142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-sport-xs-6-cyl-2-5l1E002584 THRU 1E050825142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-sport-xs-6-cyl-3-0l1E000797 THRU 1E002583142View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-xs-6-cyl-2-5l1E002584 THRU 1B792195142View
Mercury 2-STROKE-DFI-OPTIMAX250-hp-pro-xs-6-cyl-3-0l1B752547 THRU 2B535608142View
Mercury 2-STROKE-DFI-OPTIMAX250-hp-xs-6-cyl-3-0l0T651945 THRU 0T818042142View
Mercury 2-STROKE-DFI-OPTIMAX250-hp-xs-6-cyl-3-0l0T818043 THRU 0T997973132View
Mercury 2-STROKE-EFI150-200-hp-pro-max-super-mag0G610050 THRU 0G856999132View
Mercury 2-STROKE-EFI200-3-0l0T750164 THRU 0T800999142View
Mercury 2-STROKE-EFI200-3-0l0T801000 THRU 1B417701142View
Mercury 2-STROKE-EFI200-3-0l1B417702 THRU 1B504988142View
Mercury 2-STROKE-EFI200-3-0l1B504989 THRU 2B528096142View
Mercury 2-STROKE-EFI225-3-0l0G129222 THRU 0G760299142View
Mercury 2-STROKE-EFI225-3-0l0G760300 THRU 0T408999172View
Mercury 2-STROKE-EFI225-3-0l0T409000 THRU 0T800999142View
Mercury 2-STROKE-EFI225-3-0l0T801000 THRU 1B417701172View
Mercury 2-STROKE-EFI225-3-0l1B417702 THRU 1B504988172View
Mercury 2-STROKE-EFI225-3-0l1B504989 THRU 2B528096172View
Mercury 2-STROKE-EFI225-3-0l-marathon0T801000 THRU 1B417701172View
Mercury 2-STROKE-EFI225-3-0l-seapro0T801000 THRU 1B417701172View
Mercury 2-STROKE-EFI250-3-0l0G129222 THRU 0G760299142View
Mercury 2-STROKE-EFI250-3-0l0G760300 THRU 0T408999172View
Mercury 2-STROKE-EFI250-3-0l0T409000 THRU 0T800999142View
Mercury 2-STROKE-EFI250-3-0l0T801000 THRU 1B417701142View
Mercury 2-STROKE-EFI250-3-0l1B417702 THRU 1B504988142View
Mercury 2-STROKE-EFI250-3-0l1B504989 THRU 2B528096142View
Mercury 2-STROKE-EFI250-l-3-0l0T861319 THRU 1B118897142View
Mercury 2-STROKE-EFI250xb-3-0l0G980600 THRU 0T800999142View
Mercury 2-STROKE-EFI3-0l-marathon0T409000 THRU 0T800999142View
Mercury 2-STROKE-EFI3-0l-seapro0T409000 THRU 0T800999142View
Mercury 2-STROKE-EFI300-3-0l-promax0G610221 THRU 0T105297142View
Mercury 2-STROKE-EFI300-3-0l-supermagnum0G610221 THRU 0T105297142View
Mercury 2-STROKE-EFIv-150-hp-mag0D082000 THRU 0G303045142View
Mercury 2-STROKE-EFIv-150-hp-xri0D082000 THRU 0G303045142View

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Appears in diagrams of these models

  • 225 (3.0L)
  • 250 (3.0L)
  • 200 HP 6 CYL (3.0L)
  • 225 HP 6 CYL (3.0L)
  • 200 (3.0L)
  • 225 (3.0L)
  • 225 MARATHON (3.0L)
  • 225 SEAPRO (3.0L)
  • 225 HP Pro XS 6 CYL (3.0L)
  • 250 HP Pro XS 6 CYL (3.0L)
  • 250 HP XS 6 CYL (3.0L)
  • 300X (3.0L) PRO MAX
  • 2.5XS (2.5L)
  • 200 HP DTS 6 CYL (3.0L)
  • 225 HP DTS 6 CYL (3.0L)
  • 225 HP SPORT XS 6 CYL (2.5L)
  • 225 HP Sport XS 6 CYL (3.0L)
  • 225 HP XS 6 CYL (2.5L)
  • 150/200 HP PRO MAX/SUPER MAG
  • 225 (3.0L) MARATHON
  • 225 (3.0L) SEAPRO
  • 250 L (3.0L)
  • 250XB (3.0L)
  • 3.0L MARATHON
  • 3.0L SEAPRO
  • 300 (3.0L) ProMax