Mercury outboard spare part 856940A12 (RING SET Piston). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.
Fits 200 HP 6 CYL (3.0L), 250 HP XS 6 CYL (3.0L), 225 HP 6 CYL (3.0L), 250 HP Sport XS 6 CYL (2.5L), 300 HP XS 6 CYL (3.2L), JP (3.0L), V-150 HP (2.5L), 2.5XS (2.5L), 200 HP Pro XS 6 CYL (3.0L), 225 HP SPORT XS 6 CYL (2.5L), 225 HP Sport XS 6 CYL (3.0L), 225 HP XS 6 CYL (2.5L), 3.0L DSI (Diesel Spark Ignition), 150 HP PRO MAX/SUPER MAG, 150/200 HP PRO MAX/SUPER MAG. Select a model tag above to open the exploded diagram and confirm the position.
Mercury outboard part 856940A12 (RING SET Piston), documented in 29 exploded diagram location(s), across the 2-STROKE-DFI-OPTIMAX, 2-STROKE-EFI series.
| Series | Model | Serial range | REF | Qty | Diagram |
|---|---|---|---|---|---|
| Mercury 2-STROKE-DFI-OPTIMAX | 2-5xs-2-5l | 0T997974 THRU 1E000796 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 200-hp-6-cyl-3-0l | 0G590000 THRU 0G760299 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 200-hp-6-cyl-3-0l | 0G760300 THRU 0G960499 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 200-hp-6-cyl-3-0l | 0T801000 THRU 1B417701 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 200-hp-6-cyl-3-0l | 1B417702 THRU 1B504988 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 200-hp-6-cyl-3-0l | 1B912786 THRU 2B535571 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 200-hp-pro-xs-6-cyl-3-0l | 1B912786 THRU 2B535571 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 225-hp-6-cyl-3-0l | 0G590000 THRU 0G760299 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 225-hp-6-cyl-3-0l | 0G760300 THRU 0G960499 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 225-hp-6-cyl-3-0l | 0T801000 THRU 1B417701 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 225-hp-6-cyl-3-0l | 1B417702 THRU 1B504988 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 225-hp-sport-xs-6-cyl-2-5l | 1E002584 THRU 1E050825 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 225-hp-sport-xs-6-cyl-3-0l | 1E000797 THRU 1E002583 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 225-hp-xs-6-cyl-2-5l | 1E002584 THRU 1B792195 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 250-hp-sport-xs-6-cyl-2-5l | 1E002342 THRU 1E051823 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 250-hp-sport-xs-6-cyl-2-5l | 1E051824 THRU 1E052994 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 250-hp-xs-6-cyl-3-0l | 0T818043 THRU 0T997973 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 250-hp-xs-6-cyl-3-0l | 0T997974 THRU 1E000796 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 250-hp-xs-6-cyl-3-0l | 1E000797 THRU 1E002341 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 250-hp-xs-6-cyl-3-0l | 1E002342 THRU 1E051113 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 250-hp-xs-6-cyl-3-0l | 1E053158 THRU 1E053958 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 3-0l-dsi-diesel-spark-ignition | 1E052967 THRU 1E054191 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 300-hp-xs-6-cyl-3-2l | 1E001867 THRU 1E052057 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 300-hp-xs-6-cyl-3-2l | 1E052058 THRU 1E053987 | 12 | 3 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | jp-3-0l | 1E003046 THRU 1E052824 | 12 | 3 | View |
| Mercury 2-STROKE-EFI | 150-200-hp-pro-max-super-mag | 0G610050 THRU 0G856999 | 12 | 3 | View |
| Mercury 2-STROKE-EFI | 150-hp-pro-max-super-mag | 0D935000 THRU 0G610049 | 12 | 3 | View |
| Mercury 2-STROKE-EFI | v-150-hp-2-5l | 0T801000 THRU 1B226999 | 12 | 3 | View |
| Mercury 2-STROKE-EFI | v-150-hp-2-5l | 1B227000 THRU 2B121048 | 12 | 3 | View |
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