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MERCRUISER

Drive System

18-2452

18-2451

COMPLETE

COMPLETE

UPPER GEAR CASE

UPPER GEAR CASE

Replaces: 1547-9412A22

Replaces: 1547-9412A21

1.84:1/1.81:1

1.65:1/1.62:1

18-2453

18-2443

COMPLETE

COMPLETE

UPPER GEAR CASE

LOWER GEAR CASE

Replaces: 1547-9412A23

Replaces: 1623-8951A43

1.98:1/1.94:1

For: R/MR/ALPHA

18-2401

LOWER GEAR HOUSING

Replaces: 1623-8951A27,

18-2402

1623-8951A37

LOWER GEAR HOUSING

For: MR/ALPHA Style

Bore size 3.2635-3.2650. Includes tapered roller bearing for non-tractor 14/28

Replaces: 1623-5356A4

or 17/28 gears. When installing new gears use 18-2206-1 gear kit which includes

For: R Style

tapered roller bearing 18-1156 for tractor 13/21 gears.

18-2358

18-2363

UPPER UNIT

UPPER UNIT

GEAR REPAIR KIT

GEAR REPAIR KIT

Replaces: 43-803102T1

Replaces: 43-803118T1

For: 20-22 Teeth: 1.50:1 (1.47:1)

For: 20-24 Teeth: 1.98:1 (1.94/2.40:1)

Gen II applications serial number range up to OK999999 only

Gen II applications serial number range up to OK999999 only

18-2365

18-2364

UPPER UNIT

UPPER UNIT

GEAR REPAIR KIT

GEAR REPAIR KIT

Replaces: 43-803120T1

Replaces: 43-803119T1

For: 17-19 Teeth: 1.84:1 (1.81:1)

For: 24-24 Teeth: 1.65:1 (1.62:1)

Gen II applications serial number range up to OK999999 only

Gen II applications serial number range up to OK999999 only

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