Mercury outboard spare part 81555M (GASKET CYLINDER HEAD). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 30A, 20C (THRU PROP. EXHAUST), 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 81555M (GASKET CYLINDER HEAD), documented in 23 exploded diagram location(s), across the 2-STROKE-CARB series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 2-STROKE-CARB20c-thru-prop-exhaust6A9 010112 UP171View
Mercury 2-STROKE-CARB20c-thru-prop-exhaust6A9 250820 UP171View
Mercury 2-STROKE-CARB20c-thru-prop-exhaust6A9 306543 UP171View
Mercury 2-STROKE-CARB20c-thru-prop-exhaust6A9 550694 UP171View
Mercury 2-STROKE-CARB20c-thru-prop-exhaustARCHIVE CAT 96333171View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 000101 THRU 023895181View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 250101 THRU 253861181View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 300101 THRU 318173181View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 550101 THRU 555959181View
Mercury 2-STROKE-CARB25c-thru-prop-exhaustARCHIVE CAT 12536181View
Mercury 2-STROKE-CARB30a689 000366 THRU 022058181View
Mercury 2-STROKE-CARB30a689 022059 THRU 689 230100 M181View
Mercury 2-STROKE-CARB30a689 100251 THRU 105324181View
Mercury 2-STROKE-CARB30a689 105325 THRU 689 530100 ML181View
Mercury 2-STROKE-CARB30a689 301911 THRU 321376181View
Mercury 2-STROKE-CARB30a689 321377 THRU 689 250100 E181View
Mercury 2-STROKE-CARB30a689 401216 THRU 411946181View
Mercury 2-STROKE-CARB30a689 411947 THRU 689 550100 EL181View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 015001 THRU 09785866181View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 150001 THRU 09785866181View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 350001 THRU 09785866181View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 450001 THRU 09785866181View
Mercury 2-STROKE-CARB40b-thru-prop-exhaustE 676 B100461 THRU B102785181View

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Appears in diagrams of these models

  • 30A
  • 20C (THRU PROP. EXHAUST)
  • 25C (THRU PROP. EXHAUST)
  • 40 (TWIN CARB) (W/OIL INJECTION)
  • 40B (THRU PROP. EXHAUST)