Mercury outboard spare part 400266 (NUT (M10)). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 225 (3.0L), 225 MARATHON (3.0L), 225 SEAPRO (3.0L), 250 (3.0L), 200 HP 6 CYL (3.0L), 225 (3.0L), 225 HP 6 CYL (3.0L), 250XB (3.0L), 300X (3.0L) PRO MAX, 300 (3.0L) ProMax, 300 (3.0L) SuperMagnum. Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 400266 (NUT (M10)), documented in 19 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 0G76029910, 301, 10View
Mercury 2-STROKE-CARB225-3-0l0G760300 THRU 0T40899910, 301, 10View
Mercury 2-STROKE-CARB225-marathon-3-0l0G245605 THRU 0G76029910, 301, 10View
Mercury 2-STROKE-CARB225-marathon-3-0l0G760300 THRU 0T40899910, 301, 10View
Mercury 2-STROKE-CARB225-seapro-3-0l0G245605 THRU 0G76029910, 301, 10View
Mercury 2-STROKE-CARB225-seapro-3-0l0G760300 THRU 0T40899910, 301, 10View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0G386496 THRU 0G5899992310View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0T178500 THRU 0T5989992310View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0T599000 THRU 0T8009992310View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0T178500 THRU 0T5989992310View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0T599000 THRU 0T8009992310View
Mercury 2-STROKE-EFI225-3-0l0G129222 THRU 0G76029910, 291, 10View
Mercury 2-STROKE-EFI225-3-0l0T409000 THRU 0T8009992910View
Mercury 2-STROKE-EFI250-3-0l0G129222 THRU 0G76029910, 291, 10View
Mercury 2-STROKE-EFI250-3-0l0G760300 THRU 0T408999101View
Mercury 2-STROKE-EFI250-3-0l0T409000 THRU 0T8009992910View
Mercury 2-STROKE-EFI250xb-3-0l0G980600 THRU 0T80099910, 291, 10View
Mercury 2-STROKE-EFI300-3-0l-promax0G610221 THRU 0T105297101View
Mercury 2-STROKE-EFI300-3-0l-supermagnum0G610221 THRU 0T105297101View

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Appears in diagrams of these models

  • 225 (3.0L)
  • 225 MARATHON (3.0L)
  • 225 SEAPRO (3.0L)
  • 250 (3.0L)
  • 200 HP 6 CYL (3.0L)
  • 225 (3.0L)
  • 225 HP 6 CYL (3.0L)
  • 250XB (3.0L)
  • 300X (3.0L) PRO MAX
  • 300 (3.0L) ProMax
  • 300 (3.0L) SuperMagnum