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SIERRA MerCruiser Alpha I Complete Lower Drive Unit

Complete lower gear housing assembly built with proven components and tested to the same standards as Upper Units.
  • For MerCruiser R, MR, Alpha
  • Replaces OEM Part# 1623-8951A43
  • Gen II lower units are built to 1998 and up specifications
  • Covers all Gen II applications from 1991 and up
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
For Gen II ('98 & up) OL100040 & up, Replaces OEM 1623-815822A53 7862279 18-2400
Delivery within 2 - 3 weeks.

$1,799.00

For R, MR, Alpha, Replaces OEM 1623-8951A43 3735552 18-2443
Delivery within 2 - 3 weeks.

$1,459.00

Product Description

Complete lower gear housing assembly built with proven components and tested to the same standards as Upper Units.
  • For MerCruiser R, MR, Alpha
  • Replaces OEM Part# 1623-8951A43
  • Gen II lower units are built to 1998 and up specifications
  • Covers all Gen II applications from 1991 and up
Questions about this Product?
1 (800) 262-8464