Alpha 1 & Gen. 2 Outdrive Parts *Drawings *Videos

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Mercruiser Alpha One lower gearcase

GLM aftermarket parts empty lower gearcase housing

  • Replacement lower gearcase from GLM Marine
  • *Housing does not include any parts or components
  • Detailed photo of Alpha 1 lower gear housing
  • GLM Number: 17000
  • OEM Number: 1623-8951A37
  • Forward gear tapered roller bearing bore size: 3.4985 - 3.5000in. inner diameter
  • See our page for a complete list of internal parts
  • For the Alpha 1 empty upper housing, see our upper drive shaft housing page
  • MerCruiser and Alpha One Generation 2 empty lower gear housings also available

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18000 lower gearcase

18000 lower gearcase

P/N 18000 $1,099.95 OEM 24-30893