Mercury outboard spare part 855959001 (SEAT Valve Spring). 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, 25 HP EFI Jet 3 CYL, 10 HP EFI 2 CYL (333cc), 15 HP EFI 2 CYL (333cc), 25 HP EFI SeaPro 3 CYL, 35 HP EFI Jet 4 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 855959001 (SEAT Valve Spring), documented in 31 exploded diagram location(s), across the 4-STROKE-CARB, 4-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 4-STROKE-CARB8-hp-carb-209cc0P325500 THRU 1R27994464View
Mercury 4-STROKE-CARB8-hp-carb-209cc0R042475 THRU 1R27994464View
Mercury 4-STROKE-CARB9-9-hp-carb-209cc0P325500 THRU 1R27994464View
Mercury 4-STROKE-CARB9-9-hp-carb-209cc0R042475 THRU 1R27994464View
Mercury 4-STROKE-EFI10-hp-efi-2-cyl-333cc0R833820 UP124View
Mercury 4-STROKE-EFI15-hp-efi-2-cyl-333cc0R833820 UP124View
Mercury 4-STROKE-EFI15-hp-efi-seapro-2-cyl-333cc0R833820 UP124View
Mercury 4-STROKE-EFI20-hp-efi-2-cyl-333cc0R833820 UP124View
Mercury 4-STROKE-EFI25-hp-efi-3-cyl0R106999 THRU 1R162636124View
Mercury 4-STROKE-EFI25-hp-efi-3-cyl1R154758 UP124View
Mercury 4-STROKE-EFI25-hp-efi-jet-3-cyl0R165086 THRU 1R162636124View
Mercury 4-STROKE-EFI25-hp-efi-jet-3-cyl1R154758 UP124View
Mercury 4-STROKE-EFI25-hp-efi-seapro-3-cyl1R154758 UP124View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0P153500 THRU 0P400999124View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0R106999 THRU 1R162636124View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl0T409000 THRU 1B226999124View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1C109093 THRU 1C456299124View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1C456300 UP124View
Mercury 4-STROKE-EFI30-hp-efi-3-cyl1R154758 UP124View
Mercury 4-STROKE-EFI35-hp-efi-jet-4-cyl1C453840 UP124View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0P153500 THRU 0P400999124View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0P401000 THRU 0P515896124View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl0T409000 THRU 1B226999124View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1B227000 THRU 1B355027124View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1C000001 THRU 1C043416124View
Mercury 4-STROKE-EFI40-hp-efi-3-cyl1C043417 THRU 1C456299124View
Mercury 4-STROKE-EFI6-hp-efi-2cyl-209cc1R363055 UP124View
Mercury 4-STROKE-EFI8-hp-efi-2-cyl-209cc1R281445 UP124View
Mercury 4-STROKE-EFI9-9-hp-efi-2-cyl-209cc1R281445 UP124View
Mercury 4-STROKE-EFI9-9-hp-efi-prokicker-2-cyl-209cc1R281445 UP124View
Mercury 4-STROKE-EFI9-9-hp-efi-prokicker-2-cyl-333cc1R008146 THRU 1R278792124View

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Appears in diagrams of these models

  • 30 HP EFI 3 CYL
  • 40 HP EFI 3 CYL
  • 25 HP EFI Jet 3 CYL
  • 10 HP EFI 2 CYL (333cc)
  • 15 HP EFI 2 CYL (333cc)
  • 25 HP EFI SeaPro 3 CYL
  • 35 HP EFI Jet 4 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)