Mercury outboard spare part 834963A02 (PISTON ASSEMBLY). 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, 8 HP Carb (209cc), 9.9 HP Carb (209cc), 25 HP EFI Jet 3 CYL, 10 HP EFI 2 CYL (333cc), 15 HP EFI 2 CYL (333cc), 25 HP EFI SeaPro 3 CYL, 6 HP EFI 2CYL (209cc), 8 HP EFI 2 CYL (209cc), 9.9 HP EFI 2 CYL (209cc), 9.9 HP EFI ProKicker 2 CYL (209cc), 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 834963A02 (PISTON ASSEMBLY), documented in 30 exploded diagram location(s), across the 4-STROKE-CARB, 4-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 4-STROKE-CARB8-hp-carb-209cc0P325500 THRU 1R27994432View
Mercury 4-STROKE-CARB8-hp-carb-209cc0R042475 THRU 1R27994432View
Mercury 4-STROKE-CARB9-9-hp-carb-209cc0P325500 THRU 1R27994432View
Mercury 4-STROKE-CARB9-9-hp-carb-209cc0R042475 THRU 1R27994432View
Mercury 4-STROKE-EFI10-hp-efi-2-cyl-333cc0R833820 UP92View
Mercury 4-STROKE-EFI15-hp-efi-2-cyl-333cc0R833820 UP92View
Mercury 4-STROKE-EFI15-hp-efi-seapro-2-cyl-333cc0R833820 UP92View
Mercury 4-STROKE-EFI20-hp-efi-2-cyl-333cc0R833820 UP92View
Mercury 4-STROKE-EFI25-hp-efi-3-cyl0R106999 THRU 1R16263692View
Mercury 4-STROKE-EFI25-hp-efi-3-cyl1R154758 UP92View
Mercury 4-STROKE-EFI25-hp-efi-jet-3-cyl0R165086 THRU 1R16263692View
Mercury 4-STROKE-EFI25-hp-efi-jet-3-cyl1R154758 UP92View
Mercury 4-STROKE-EFI25-hp-efi-seapro-3-cyl1R154758 UP92View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0P153500 THRU 0P40099992View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0R106999 THRU 1R16263692View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0T409000 THRU 1B22699992View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1C109093 THRU 1C45629992View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1C456300 UP92View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1R154758 UP92View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0P153500 THRU 0P40099992View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0P401000 THRU 0P51589692View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0T409000 THRU 1B22699992View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1B227000 THRU 1B35502792View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1C000001 THRU 1C04341692View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1C043417 THRU 1C45629992View
Mercury 4-STROKE-EFI6-hp-efi-2cyl-209cc1R363055 UP92View
Mercury 4-STROKE-EFI8-hp-efi-2-cyl-209cc1R281445 UP92View
Mercury 4-STROKE-EFI9-9-hp-efi-2-cyl-209cc1R281445 UP92View
Mercury 4-STROKE-EFI9-9-hp-efi-prokicker-2-cyl-209cc1R281445 UP92View
Mercury 4-STROKE-EFI9-9-hp-efi-prokicker-2-cyl-333cc1R008146 THRU 1R27879292View

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Appears in diagrams of these models

  • 30 HP EFI 3 CYL
  • 40 HP EFI 3 CYL
  • 8 HP Carb (209cc)
  • 9.9 HP Carb (209cc)
  • 25 HP EFI Jet 3 CYL
  • 10 HP EFI 2 CYL (333cc)
  • 15 HP EFI 2 CYL (333cc)
  • 25 HP EFI SeaPro 3 CYL
  • 6 HP EFI 2CYL (209cc)
  • 8 HP EFI 2 CYL (209cc)
  • 9.9 HP EFI 2 CYL (209cc)
  • 9.9 HP EFI ProKicker 2 CYL (209cc)
  • 9.9 HP EFI ProKicker 2 CYL (333cc)