| HP | Year | Original Bore Size |
Size | Part # | Bore Size |
| 85 HP 90 HP |
1984-1989 1990 |
3.312 | 0.020 0.030 0.040 |
3129P2 3129P3 3129P4 |
3.332 3.342 3.352 |
| 70-90 HP | 1990-1995 | 3.375 | 0.020 0.030 |
3151P2 3151P3 |
3.395 3.405 |
| 75-90 HP | 1996-1999 | 3.375 | 0.020 0.030 0.040 |
3164P2 3164P3 3164P4 |
3.395 3.405 3.415 |
| 125 HP | 1985-1999 | 3.312 | 0.020 0.030 0.040 |
3129P2 3129P3 3129P4 |
3.332 3.342 3.352 |
| 120 HP | 1990-1995 | 3.375 | 0.020 0.030 |
3151P2 3151P3 |
3.395 3.405 |
| 120 HP | 1996-1999 | 3.375 | 0.020 0.030 0.040 |
3164P2 3164P3 3164P4 |
3.395 3.405 3.415 |
| 150 HP | 1989-1990 | 3.312 | 0.020 0.030 0.040 |
3129P2 3129P3 3129P4 |
3.332 3.342 3.352 |
| 150 HP | 1990-1994 | 3.375 | 0.020 0.030 |
3151P2 3151P3 |
3.395 3.405 |
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