Mercury outboard spare part 859431 (FITTING). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 200 HP XS 6 CYL (2.5L), 135 HP V6 CYL (2.5L), 150 HP V6 CYL (2.5L), 200 HP 6 CYL (3.0L), 175 HP V6 CYL (2.5L), 200 HP DTS 6 CYL (3.0L), 115 HP V6 CYL (2.5L), 225 HP 6 CYL (3.0L). Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 859431 (FITTING), documented in 45 exploded diagram location(s), across the 2-STROKE-DFI-OPTIMAX, 2-STROKE-EFI, 4-STROKE-EFI series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 2-STROKE-DFI-OPTIMAX115-hp-v6-cyl-2-5l0G960500 THRU 0T17849921View
Mercury 2-STROKE-DFI-OPTIMAX175-hp-v6-cyl-2-5l0T178500 THRU 0T80099921View
Mercury 2-STROKE-DFI-OPTIMAX175-hp-v6-cyl-2-5l0T801000 THRU 1B226999232View
Mercury 2-STROKE-DFI-OPTIMAX175-hp-v6-cyl-2-5l1B227000 THRU 1B417701232View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0T178500 THRU 0T59899916, 361View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0T599000 THRU 0T80099916, 2, 361View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-6-cyl-3-0l0T801000 THRU 1B41770115, 21View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-dts-6-cyl-3-0l0T980000 THRU 1B41770115, 21View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-xs-6-cyl-2-5l0T818181 THRU 1E00079616, 231View
Mercury 2-STROKE-DFI-OPTIMAX200-hp-xs-6-cyl-2-5l1E000797 THRU 1E00211016, 231View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0T178500 THRU 0T59899916, 361View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0T599000 THRU 0T80099916, 2, 361View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-6-cyl-3-0l0T801000 THRU 1B41770115, 21View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-dts-6-cyl-3-0l0T599000 THRU 1B41770115, 21View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-pro-xs-6-cyl-3-0l1B104549 THRU 1B426560161View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-pro-xs-6-cyl-3-0l1B426561 THRU 1B752546161View
Mercury 2-STROKE-DFI-OPTIMAX225-hp-pro-xs-6-cyl-3-0l1B752547 THRU 2B535608161View
Mercury 2-STROKE-DFI-OPTIMAX250-hp-pro-xs-6-cyl-3-0l1B752547 THRU 2B535608161View
Mercury 2-STROKE-DFI-OPTIMAX250-hp-xs-6-cyl-3-0l0T651945 THRU 0T818042431View
Mercury 2-STROKE-DFI-OPTIMAX250-hp-xs-6-cyl-3-0l0T818043 THRU 0T99797321View
Mercury 2-STROKE-DFI-OPTIMAXjp-3-0l1E003046 THRU 1E05282421View
Mercury 2-STROKE-EFI200-3-0l0T750164 THRU 0T80099916, 361View
Mercury 2-STROKE-EFI200-3-0l0T801000 THRU 1B41770116, 361View
Mercury 2-STROKE-EFI200-3-0l1B417702 THRU 1B504988161View
Mercury 2-STROKE-EFI200-3-0l1B504989 THRU 2B528096161View
Mercury 2-STROKE-EFI225-3-0l0T409000 THRU 0T80099916, 361View
Mercury 2-STROKE-EFI225-3-0l0T801000 THRU 1B41770116, 361View
Mercury 2-STROKE-EFI225-3-0l1B417702 THRU 1B504988161View
Mercury 2-STROKE-EFI225-3-0l1B504989 THRU 2B528096161View
Mercury 2-STROKE-EFI225-3-0l-marathon0T801000 THRU 1B41770116, 361View
Mercury 2-STROKE-EFI225-3-0l-seapro0T801000 THRU 1B41770116, 361View
Mercury 2-STROKE-EFI225x-efi-promax0T430254 THRU 0T819605191View
Mercury 2-STROKE-EFI250-3-0l0T409000 THRU 0T80099916, 361View
Mercury 2-STROKE-EFI250-3-0l0T801000 THRU 1B41770116, 361View
Mercury 2-STROKE-EFI250-3-0l1B417702 THRU 1B504988161View
Mercury 2-STROKE-EFI250-3-0l1B504989 THRU 2B528096161View
Mercury 2-STROKE-EFI250-l-3-0l0T861319 THRU 1B118897161View
Mercury 2-STROKE-EFI3-0l-marathon0T409000 THRU 0T80099916, 361View
Mercury 2-STROKE-EFI3-0l-seapro0T409000 THRU 0T80099916, 361View
Mercury 2-STROKE-EFIv-150-hp-2-5l0T409000 THRU 0T80099911View
Mercury 2-STROKE-EFIv-175-efi-2-5l0T409000 THRU 0T8009991, 71View
Mercury 2-STROKE-EFIv-200-2-5l0T409000 THRU 0T8009991, 71View
Mercury 2-STROKE-EFIv-200-2-5l0T801000 THRU 1B22699919, 71View
Mercury 2-STROKE-EFIv-200-2-5l1B227000 THRU 2B12104819, 71View
Mercury 4-STROKE-EFI225-hp-efi0T653945 UP91View

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Appears in diagrams of these models

  • 200 HP XS 6 CYL (2.5L)
  • 135 HP V6 CYL (2.5L)
  • 150 HP V6 CYL (2.5L)
  • 200 HP 6 CYL (3.0L)
  • 175 HP V6 CYL (2.5L)
  • 200 HP DTS 6 CYL (3.0L)
  • 115 HP V6 CYL (2.5L)
  • 225 HP 6 CYL (3.0L)