Mercury outboard spare part 803551001 (NUT). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 30 HP EFI 3 CYL, 40 HP EFI 3 CYL, 4 HP Carb, 5 HP Carb, 6 HP Carb, 25 HP EFI Jet 3 CYL, 2 HP Carb, 2.5 HP Carb, 3.5 HP Carb JCI, 3.5 HP Carb, 10 HP EFI 2 CYL (333cc), 25 HP EFI SeaPro 3 CYL, 35 HP EFI Jet 4 CYL, 5 HP Carb JCI, 15 HP EFI 2 CYL (333cc), 15 HP EFI SeaPro 2 CYL (333cc), 20 HP EFI 2 CYL (333cc), 25 HP EFI 3 CYL, 40 HP EFI 4 CYL, 5 HP Propane, 9.9 HP EFI ProKicker 2 CYL (333cc). Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 803551001 (NUT), documented in 55 exploded diagram location(s), across the 4-STROKE-CARB, 4-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 4-STROKE-CARB2-5-hp-carb0R131842 UP162View
Mercury 4-STROKE-CARB2-hp-carb0R131842 THRU 0R504789162View
Mercury 4-STROKE-CARB3-5-hp-carb0R131842 UP162View
Mercury 4-STROKE-CARB3-5-hp-carb-jci0R568285 UP162View
Mercury 4-STROKE-CARB4-hp-carb0P073456 THRU 0P40099982View
Mercury 4-STROKE-CARB4-hp-carb0P401000 THRU 0R41183782View
Mercury 4-STROKE-CARB4-hp-carb0R000001 THRU 0R06708982View
Mercury 4-STROKE-CARB4-hp-carb0R067090 THRU 0R41183782View
Mercury 4-STROKE-CARB4-hp-carb0R411838 UP82View
Mercury 4-STROKE-CARB5-hp-carb0P073456 THRU 0P40099982View
Mercury 4-STROKE-CARB5-hp-carb0P401000 THRU 0R41183782View
Mercury 4-STROKE-CARB5-hp-carb0R000001 THRU 0R06708982View
Mercury 4-STROKE-CARB5-hp-carb0R067090 THRU 0R41183782View
Mercury 4-STROKE-CARB5-hp-carb0R411838 UP82View
Mercury 4-STROKE-CARB5-hp-carb-jci0R560794 UP82View
Mercury 4-STROKE-CARB6-hp-carb0P073456 THRU 0P40099982View
Mercury 4-STROKE-CARB6-hp-carb0P401000 THRU 0R41183782View
Mercury 4-STROKE-CARB6-hp-carb0R000001 THRU 0R06708982View
Mercury 4-STROKE-CARB6-hp-carb0R067090 THRU 0R41183782View
Mercury 4-STROKE-CARB6-hp-carb0R411838 UP82View
Mercury 4-STROKE-EFI10-hp-efi-2-cyl-333cc0R833820 UP82View
Mercury 4-STROKE-EFI10-hp-efi-2-cyl-333cc0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI15-hp-efi-2-cyl-333cc0R833820 UP82View
Mercury 4-STROKE-EFI15-hp-efi-2-cyl-333cc0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI15-hp-efi-seapro-2-cyl-333cc0R833820 UP82View
Mercury 4-STROKE-EFI15-hp-efi-seapro-2-cyl-333cc0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI20-hp-efi-2-cyl-333cc0R833820 UP82View
Mercury 4-STROKE-EFI20-hp-efi-2-cyl-333cc0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI25-hp-efi-3-cyl0R106999 THRU 1R16263682View
Mercury 4-STROKE-EFI25-hp-efi-3-cyl0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI25-hp-efi-3-cyl1R154758 UP82View
Mercury 4-STROKE-EFI25-hp-efi-jet-3-cyl0R165086 THRU 1R16263682View
Mercury 4-STROKE-EFI25-hp-efi-jet-3-cyl0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI25-hp-efi-jet-3-cyl1R154758 UP82View
Mercury 4-STROKE-EFI25-hp-efi-seapro-3-cyl0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI25-hp-efi-seapro-3-cyl1R154758 UP82View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0P153500 THRU 0P40099982View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0R106999 THRU 1R16263682View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0T409000 THRU 1B22699982View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1C109093 THRU 1C45629982View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1C456300 UP82View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1R154758 UP82View
Mercury 4-STROKE-EFI35-hp-efi-jet-4-cyl0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI35-hp-efi-jet-4-cyl1C453840 UP82View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0P153500 THRU 0P40099982View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0P401000 THRU 0P51589682View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0T409000 THRU 1B22699982View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1B227000 THRU 1B35502782View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1C000001 THRU 1C04341682View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1C043417 THRU 1C45629982View
Mercury 4-STROKE-EFI40-hp-efi-4-cyl0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI5-hp-propane0R936270 THRU 1R28049582View
Mercury 4-STROKE-EFI9-9-hp-efi-prokicker-2-cyl-333cc1R008146 THRU 1R27879282View

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Appears in diagrams of these models

  • 30 HP EFI 3 CYL
  • 40 HP EFI 3 CYL
  • 4 HP Carb
  • 5 HP Carb
  • 6 HP Carb
  • 25 HP EFI Jet 3 CYL
  • 2 HP Carb
  • 2.5 HP Carb
  • 3.5 HP Carb JCI
  • 3.5 HP Carb
  • 10 HP EFI 2 CYL (333cc)
  • 25 HP EFI SeaPro 3 CYL
  • 35 HP EFI Jet 4 CYL
  • 5 HP Carb JCI
  • 15 HP EFI 2 CYL (333cc)
  • 15 HP EFI SeaPro 2 CYL (333cc)
  • 20 HP EFI 2 CYL (333cc)
  • 25 HP EFI 3 CYL
  • 40 HP EFI 4 CYL
  • 5 HP Propane
  • 9.9 HP EFI ProKicker 2 CYL (333cc)