Mercury outboard spare part 878285 (O-RING). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.
Fits 300X (3.0L) PRO MAX, 175 HP V6 CYL (2.5L), 250 HP Pro XS 6 CYL (3.0L). Select a model tag above to open the exploded diagram and confirm the position.
Mercury outboard part 878285 (O-RING), documented in 4 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 | 175-hp-v6-cyl-2-5l | 1B227000 THRU 1B417701 | - | 1 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 175-hp-v6-cyl-2-5l | 1B417702 THRU 1B508457 | - | 1 | View |
| Mercury 2-STROKE-DFI-OPTIMAX | 250-hp-pro-xs-6-cyl-3-0l | 1B426561 THRU 1B752546 | - | 1 | View |
| Mercury 2-STROKE-EFI | 300x-3-0l-pro-max | 0T429940 THRU 0T999587 | - | 1 | View |
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