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Pinion Bearings for MerCruiser Drives

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                                  Pre-Alpha

This is MerCruiser p/n 31- 92366A1. It has 14 roller bearings and is used on all # 1 drives from 1965 - 1983. This bearing is used in conjunction with a vertical drive shaft which has a pre load pin on the very top of the shaft. 

The outside diameter of this bearing is 1.752 and the inside is .992

All pinion bearing are installed with the numbers facing upwards.

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          : Order # 1600

 

 

                                    Alpha & Gen II

This is MerCruiser p/n 31- 42647A1. It has 18 roller bearings and is used on all # 1 drives from 1984 - date including Generation II. This bearing is used in conjunction with a vertical drive shaft which has no pre load pin on the very top of the shaft. 

The outside diameter of this bearing is 1.752 and the inside is 1.125

All pinion bearing are installed with the numbers facing upwards.

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        : Order # 1610

 

 

                      

                                Bravo 1


This is MerCruiser p/n 31- 86754T. It has 19 roller bearings and is used on Bravo 1 drives. 

The outside diameter of this bearing is 2.130 and the inside is 1.472

All pinion bearing are installed with the numbers facing upwards.

          : Order # 6754

 

 

 

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