Mercury outboard spare part 7871M (CRANKCASE ASSEMBLY). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 30A, 25C (THRU PROP. EXHAUST), 40 (TWIN CARB) (W/OIL INJECTION), 40B (THRU PROP. EXHAUST). Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 7871M (CRANKCASE ASSEMBLY), documented in 18 exploded diagram location(s), across the 2-STROKE-CARB series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 000101 THRU 02389511View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 250101 THRU 25386111View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 300101 THRU 31817311View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 550101 THRU 55595911View
Mercury 2-STROKE-CARB25c-thru-prop-exhaustARCHIVE CAT 1253611View
Mercury 2-STROKE-CARB30a689 000366 THRU 02205811View
Mercury 2-STROKE-CARB30a689 022059 THRU 689 230100 M11View
Mercury 2-STROKE-CARB30a689 100251 THRU 10532411View
Mercury 2-STROKE-CARB30a689 105325 THRU 689 530100 ML11View
Mercury 2-STROKE-CARB30a689 301911 THRU 32137611View
Mercury 2-STROKE-CARB30a689 321377 THRU 689 250100 E11View
Mercury 2-STROKE-CARB30a689 401216 THRU 41194611View
Mercury 2-STROKE-CARB30a689 411947 THRU 689 550100 EL11View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 015001 THRU 0978586611View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 150001 THRU 0978586611View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 350001 THRU 0978586611View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 450001 THRU 0978586611View
Mercury 2-STROKE-CARB40b-thru-prop-exhaustE 676 B100461 THRU B10278511View

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Appears in diagrams of these models

  • 30A
  • 25C (THRU PROP. EXHAUST)
  • 40 (TWIN CARB) (W/OIL INJECTION)
  • 40B (THRU PROP. EXHAUST)