sterndrives.comUpper Gear Kits

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Insist on ONLY Mercruiser Factory Parts!

This section is really for Authorized Mercruiser Mechanics.

Replacing upper gearsets takes training, experience and special Mercruiser tools.

Much of our Mercruiser Parts Sales are to other dealers who don't have stock.

Upper gears are installed using a very accurate shimming system to
insure gear longivity.
A mis-shimmed gearset may only last a couple of hours!

Mercruiser Upper Gearsets are Machine Matched for smooth operation & minimal tooth wear.

The Kits come in different ratios and most include bearings, shims and seals needed.

Upper Gear Sets for R, MR, Alpha One and SS

These Gear Sets include both gears, all bearings, all shim sets, all seals,
all o-rings, pinion nut, pinion washer, bearing spacers and drive mounting gasket.

Click here to order Upper Gear Sets

43-803155T 1 16-20 teeth 1.32 Ratio (1983-1990)
43-803116T 1 20-22 teeth 1.50 Ratio (1983-1990)
43-803112T 1 24-24 teeth 1.65 Ratio (1983-1990)
43-803114T 1 17-19 teeth 1.84 Ratio (1983-1990)
43-803101T 1 20-24 teeth 1.98 Ratio (1983-1990)

Upper Gear Sets for Alpha Generation II

These Gear Sets include both gears, all bearings, all shim sets, all seals,
all o-rings, pinion nut, pinion washer, bearing spacers and drive mounting gasket.

Click here to order Upper Gear Sets

43-803102T 1 20-22 teeth 1.47 Ratio (s/n 0D469856-0K999999) (1991-1997)
43-803103T 1 20-22 teeth 1.47 Ratio (s/n 0L100040 and above)(1998 and up)
43-803104T 1 24-24 teeth 1.62 and 2.00 Ratio (s/n 0L100040 and above)(1998 and up)
43-803119T 1 24-24 teeth 1.62 Ratio (s/n 0D469856-0K999999) (1991-1997)
43-803105T 1 17-19 teeth 1.81 Ratio (s/n 0L100040 and above)(1998 and up)
43-803120T 1 17-19 teeth 1.81 Ratio (s/n 0D469856-0K999999) (1991-1997)
43-803106T 1 20-24 teeth 1.94 and 2.40 Ratio (s/n 0L100040 and above)(1998 and up)
43-803118T 1 20-24 teeth 1.94 and 2.40 Ratio (s/n 0D469856-0K999999) (1991-1997)

Upper Gear Sets for Bravo Drives (Earlier Models)

These Bravo Upper Gear Sets include all three upper gears, all bearings, all seals,
all o-rings, keepers, clutch, shift cam assembly, shift shaft, upper spiral shaft,
set screws, pinion nut,check ball and spring, thrust washers and shims.

43-803108T 1 27-29 teeth Fits Bravo One 1.36, Bravo II and III 1.81
(s/n 0B664190-0F345867)(1988-1995)
43-803107T 1 27-23 teeth Fits Bravo One 1.50, Bravo II 2.00 and Bravo III 1.50, 1.65 and 2.00
(s/n 0B664190-0F345867)(1988-1995)
43-803109T 1 23-30 teeth Fits Bravo One 1.65, Bravo II and Bravo III 2.20
(s/n 0B664190-0F345867)(1988-1995)

Upper Gear Sets for Bravo Drives (Newer Models)

These Bravo Upper Gear Sets include all three upper gears, all bearings, all seals,
all o-rings, keepers, set screws, pinion nut, check ball and spring, thrust washers and shims.
Note: These kits do NOT include clutch, shaft or shift yoke.

43-803111T 1 27-29 teeth
Fits Bravo One 1.36 Ratio (s/n 0F345868-0K103438)(1995-1997)
Fits Bravo Two 1.50 and Bravo Three 1.36 (s/n 0F345868-0K262209)(1995-1997)
Fits Bravo Two and Bravo Three 1.81 (s/n 0F345868-0L999999)(1995-1999)
43-803110T 1 27-32 teeth
Fits Bravo One 1.50, Bravo Two and Bravo Three 1.65 and 2.00 (s/n 0F345868-0L999999)(1995-1999)
43-803113T 1 23-30 teeth
Fits Bravo One 1.65, Bravo Two 2.20 and Bravo Three 2.20 and 2.43 (s/n 0F345868-0L999999)(1995-1999)


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