Mercury outboard spare part 83721M (SPRING). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.

Fits 30A, 20C (THRU PROP. EXHAUST), 25C (THRU PROP. EXHAUST), 40B (THRU PROP. EXHAUST), 40C (TWIN CARB) (W/AUTO-BLEND), 40 (TWIN CARB) (W/OIL INJECTION), 40C (TWIN CARB), 6C HP, 8C HP, 8K HP, 30 2 CYL (International), 8W HP (Marathon), 6D HP, W40 (W/MARATHON). Select a model tag above to open the exploded diagram and confirm the position.

Part Specifications and Installation Reference

Mercury outboard part 83721M (SPRING), documented in 56 exploded diagram location(s), across the 2-STROKE-CARB series.

SeriesModelSerial rangeREFQtyDiagram
Mercury 2-STROKE-CARB20c-thru-prop-exhaust6A9 010112 UP161View
Mercury 2-STROKE-CARB20c-thru-prop-exhaust6A9 250820 UP161View
Mercury 2-STROKE-CARB20c-thru-prop-exhaust6A9 306543 UP161View
Mercury 2-STROKE-CARB20c-thru-prop-exhaust6A9 550694 UP161View
Mercury 2-STROKE-CARB20c-thru-prop-exhaustARCHIVE CAT 96333161View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 000101 THRU 023895161View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 250101 THRU 253861161View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 300101 THRU 318173161View
Mercury 2-STROKE-CARB25c-thru-prop-exhaust695 550101 THRU 555959161View
Mercury 2-STROKE-CARB25c-thru-prop-exhaustARCHIVE CAT 12536161View
Mercury 2-STROKE-CARB30-2-cyl-international0N001875 THRU 0N055504161View
Mercury 2-STROKE-CARB30-2-cyl-international0N055505 UP161View
Mercury 2-STROKE-CARB30-2-cyl-internationalARCHIVE CAT 85383397161View
Mercury 2-STROKE-CARB30a689 000366 THRU 022058161View
Mercury 2-STROKE-CARB30a689 022059 THRU 689 230100 M161View
Mercury 2-STROKE-CARB30a689 100251 THRU 105324161View
Mercury 2-STROKE-CARB30a689 105325 THRU 689 530100 ML161View
Mercury 2-STROKE-CARB30a689 301911 THRU 321376161View
Mercury 2-STROKE-CARB30a689 321377 THRU 689 250100 E161View
Mercury 2-STROKE-CARB30a689 401216 THRU 411946161View
Mercury 2-STROKE-CARB30a689 411947 THRU 689 550100 EL161View
Mercury 2-STROKE-CARB30aARCHIVE CAT 81115590161View
Mercury 2-STROKE-CARB40-twin-carb-w-oil-injection6E9 015001 THRU 09785866161View
Mercury 2-STROKE-CARB40b-thru-prop-exhaustARCHIVE CAT 94535161View
Mercury 2-STROKE-CARB40b-thru-prop-exhaustE 676 B100461 THRU B10278511, 161View
Mercury 2-STROKE-CARB40b-thru-prop-exhaustEL 676 B400420 THRU B40525011, 161View
Mercury 2-STROKE-CARB40b-thru-prop-exhaustM 676 B000106 THRU B00278011, 161View
Mercury 2-STROKE-CARB40b-thru-prop-exhaustML 676 B300101 THRU B30242511, 161View
Mercury 2-STROKE-CARB40c-twin-carb6E9 000106 THRU 6E9 007665 M11, 161View
Mercury 2-STROKE-CARB40c-twin-carb6E9 100101 THRU 6E9 105013 E161View
Mercury 2-STROKE-CARB40c-twin-carb6E9 300126 THRU 6E9 309343 ML161View
Mercury 2-STROKE-CARB40c-twin-carb6E9 400231 THRU 6E9 423162 EL161View
Mercury 2-STROKE-CARB40c-twin-carb-w-auto-blend6E9 007666 THRU 6E9 01500011, 131View
Mercury 2-STROKE-CARB40c-twin-carb-w-auto-blend6E9 105014 THRU 6E9 150000131View
Mercury 2-STROKE-CARB40c-twin-carb-w-auto-blend6E9 309344 THRU 350000131View
Mercury 2-STROKE-CARB40c-twin-carb-w-auto-blend6E9 423163 THRU 450000131View
Mercury 2-STROKE-CARB40c-twin-carb-w-auto-blend6E9 500101 THRU 00503940131View
Mercury 2-STROKE-CARB6c-hp6H8 000317 THRU 010381301View
Mercury 2-STROKE-CARB6c-hp6H8 010382 THRU 0B367529301View
Mercury 2-STROKE-CARB6c-hp6H8 300171 THRU 306502301View
Mercury 2-STROKE-CARB6c-hp6H8 306503 THRU 0B367529301View
Mercury 2-STROKE-CARB6d-hp6H6 001302 THRU 0B367529301View
Mercury 2-STROKE-CARB6d-hp6H6 300406 THRU 0B367529301View
Mercury 2-STROKE-CARB8c-hp6G1 027238 THRU 0B367529301View
Mercury 2-STROKE-CARB8c-hp6G1 316712 THRU 0B367529301View
Mercury 2-STROKE-CARB8c-hp6G1 7008786 THRU 0B367529301View
Mercury 2-STROKE-CARB8c-hpARCHIVE CAT 11660301View
Mercury 2-STROKE-CARB8k-hp680 001986 UP121View
Mercury 2-STROKE-CARB8k-hp680 348706 UP121View
Mercury 2-STROKE-CARB8k-hp680K 300302 UP121View
Mercury 2-STROKE-CARB8k-hpARCHIVE CAT 94809121View
Mercury 2-STROKE-CARB8w-hp-marathon677 057507 UP161View
Mercury 2-STROKE-CARB8w-hp-marathon677 383147 UP161View
Mercury 2-STROKE-CARB8w-hp-marathon677 702821 UP161View
Mercury 2-STROKE-CARBw40-w-marathon6F6 005206 THRU 00365385111View
Mercury 2-STROKE-CARBw40-w-marathon6F6 308308 THRU 00365385111View

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Appears in diagrams of these models

  • 30A
  • 20C (THRU PROP. EXHAUST)
  • 25C (THRU PROP. EXHAUST)
  • 40B (THRU PROP. EXHAUST)
  • 40C (TWIN CARB) (W/AUTO-BLEND)
  • 40 (TWIN CARB) (W/OIL INJECTION)
  • 40C (TWIN CARB)
  • 6C HP
  • 8C HP
  • 8K HP
  • 30 2 CYL (International)
  • 8W HP (Marathon)
  • 6D HP
  • W40 (W/MARATHON)