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Bearing Tapered Roller Upper Unit for Mercruiser OMC Outdrive 31-35990A1


  • Part #: GLM21540

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Tapered Roller Bearing that is used on the driven gear in the Upper unit of many Mercruiser stern drive models(1/R/MC/Alpha one/ and Alpha One Gen11.).

It is Used with all ratios except 1.50, 1.47 and 1.32.

This bearing is also used on the Upper Gearcase driven gear on OMC Cobras from 1986 thru 1993 and Johnson Evinrude.

Replaces O.E.M. # s Merc. 31-35990A1, OMC 983891.

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