Mercury outboard spare part 8M0053120 (GEAR SET Counter Rotation, Forward/Pinion, 1.75 Ratio (12/21) Forward and Pinion). Supplied by Dimo Marine for wholesale and export — genuine and quality aftermarket options available.
Fits 250R HP 4.6L V8 Racing, 300R HP 4.6L V8 Racing, 300R HP 4.6L V8 AMS Racing. Select a model tag above to open the exploded diagram and confirm the position.
Mercury outboard part 8M0053120 (GEAR SET Counter Rotation, Forward/Pinion, 1.75 Ratio (12/21) Forward and Pinion), documented in 23 exploded diagram location(s), across the 4-STROKE-EFI series.
| Series | Model | Serial range | REF | Qty | Diagram |
|---|---|---|---|---|---|
| Mercury 4-STROKE-EFI | 200-hp-verado-6-cyl | 0P520553 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 200-hp-verado-6-cyl | 1B517434 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 200-hp-verado-6-cyl | 2B144123 THRU 2B578935 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 225-hp-verado-6-cyl | 0P520553 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 225-hp-verado-6-cyl | 1B517434 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 225-hp-verado-6-cyl | 2B144123 THRU 2B578935 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 250-hp-verado-6-cyl | 0P520553 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 250-hp-verado-6-cyl | 1B517434 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 250-hp-verado-6-cyl | 2B144123 THRU 2B578935 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 250r-hp-4-6l-v8-racing | 1E080500 UP | -, 31, 32 | 1 | View |
| Mercury 4-STROKE-EFI | 275-hp-verado-6-cyl | 0P520553 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 275-hp-verado-6-cyl | 1B517434 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 275-hp-verado-6-cyl | 2B144123 THRU 2B578935 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 300-hp-verado-6-cyl | 0P520553 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 300-hp-verado-6-cyl | 1B517434 THRU 2B144122 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 300-hp-verado-6-cyl | 2B144123 THRU 2B578935 | 18, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 300r-hp-4-6l-v8-ams-racing | 1E081459 UP | 32 | 1 | View |
| Mercury 4-STROKE-EFI | 300r-hp-4-6l-v8-racing | 1E080500 UP | -, 31, 32 | 1 | View |
| Mercury 4-STROKE-EFI | 350-hp-2-6l-l6-pro-verado | 2B141124 THRU 3B342962 | 18, 25, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 350-hp-2-6l-l6-verado | 2B141617 THRU 3B342962 | 18, 25, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 350-hp-sci-verado | 1B716557 THRU 2B143542 | 18 | 1 | View |
| Mercury 4-STROKE-EFI | 400-hp-2-6l-l6-verado | 2B618256 THRU 3B342962 | 18, 25, 28 | 1 | View |
| Mercury 4-STROKE-EFI | 400r-hp-2-6l-l6-racing | 2B141124 THRU 3B342962 | 18, 25, 28 | 1 | View |
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