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Upper Gear Kits

For a complete listing of all Upper Gears and Upper Gear Kits, click HERE.
For a complete listing of all Lower Gears and Lower Gear Kits, click HERE.

Insist on ONLY Original Factory Parts

Alpha One Upper Gears Model Alpha One (1983-1990) Serial Numbers 6216687-0D469858 These sets are "gears only". They only include the lower bearing.
Part Number	Description	Teeth	Price	Click to Buy
43-55778A3	Gear Kit 1.98:1 Ratio	20-24	$ 285.00
43-45814A5	Gear Kit 1.65:1 Ratio	24-24	$ 305.00
43-75325A3	Gear Kit 1.84:1 Ratio	17-19	$ 298.00
43-18411A2	Gear Kit 1.50:1 Ratio	20-22	$ 428.00
43-66773A3	Gear Kit 1.32:1 Ratio	16-20	$ 616.00
43-18411A4	Gear Kit Comp with bearings and shims replaces 1.50:1 Heavy Duty Kit	20-22	$ 612.00

The Kits below are COMPLETE Upper Gear Kits.
They include all upper bearings, shims, seals, orings
pinion nut and gaskets.

Part Number    Description    Ratio         Year        Cost	Click to Buy Now
43-803115T 1 16-20 teeth 1.32 Ratio (1983-1990) $695.00.00
43-803116T 1 20-22 teeth 1.50 Ratio (1983-1990) $555.00
43-803112T 1 24-24 teeth 1.65 Ratio (1983-1990) $485.00
43-803114T 1 17-19 teeth 1.84 Ratio (1983-1990) $486.00
43-803101T 1 20-24 teeth 1.98 Ratio (1983-1990) $477.00

Lower Gear Housing Gear Kits and Sets

Insist on ONLY Original Factory Parts

Gear Sets do not always include seals, gaskets, shims or bearings.
They often only include the pinion and forward gears.

Gear Kits include seals, gaskets, shims, bearings, pinion nut and
possibly other items such as a clutch, spool, tab washer.
They usually include all three lower gears.

For a complete listing of all Lower Gears and Lower Gear Kits, click HERE.

43-803079T1 Gear Kit Fits R drive $917.00 Click here to view part on Mercury Marine's website The R drive has a pre-load pin on the driveshaft

43-803091T1 Gear Kit Fits Std Rot (RH) MR & Alpha One $788.00 Click here to view part on Mercury Marine's website The MR & Alpha One drives have no pre-load pin on the driveshaft

43-803093T1 Gear Kit Fits Counter Rot (LH) MR & Alpha One $996.00 Click here to view part on Mercury Marine's website

43-803069T1 Gear Kit Fits Std Rot (RH) $1220.00 Alpha Gen II (except 2.40 ratio) (s/n 0D469859-0F679999) Click here to view part on Mercury Marine's website
43-803070T1 Gear Kit Fits Std. Rot. (RH) $1374.00 NO LONGER MANUFACTURED Alpha Gen II (2.40 ratio) (s/n 0D469859-0F6799999) Click here to view part on Mercury Marine's website

43-803076T1 Gear Kit Fits Counter Rot. (LH) $1045.00 Alpha Generation II (C/R)(s/n 0D469859-0F679999) Click here to view part on Mercury Marine's website

43-803071T1 Gear Kit Fits Std Rot (RH) $852.00 Alpha Generation II (except 2.40 ratio) (s/n 0F680000-0K999999) Click here to view part on Mercury Marine's website
43-803072T1 Gear Kit Fits Std Rot (RH) $1422.00 NO LONGER MANUFACTURED Alpha Generation II (2.40 ratio) (s/n 0F680000-0K999999) Click here to view part on Mercury Marine's website

43-803077T1 Gear Kit Fits Counter Rotatio (LH) $1158.00 NO LONGER MANUFACTURED Alpha Generation II (C/R)(except 2.00 ratio) (s/n 0F680000 and above) Click here to view part on Mercury Marine's website

43-803073T1 Gear Kit Fits Std Rot (RH) $879.00 Alpha Generation II (ecept 2.0 & 2.4 ratio) (s/n 0L100010 and up) Click here to view part on Mercury Marine's website
43-803074T1 Gear Kit Fits Std Rot (RH) $830.00 Alpha Generation II (2.0 & 2.4 ratio) (s/n 0L100010 and up) Click here to view part on Mercury Marine's website

43-96084A4 Gear Set (includes pinion bearing & reverse gear) $765.90 Fits MC-I, R Drive (17-28 teeth)(pre-load pin on driveshaft) Click here to view part on Mercury Marine's website

43-96084A7 Gear Set (Includes pinion and fwd gear only) $489.00 Fits MC-I, R Drive (17-28 teeth)(pre-load pin on driveshaft) If you also need a reverse gear, order kit 43-96084A4 above Click here to view part on Mercury Marine's website

43-878087A4 Gear Set Fits MR/ Alpha One & Gen II $658.00 13-21 Teeth (no pre-load pin on driveshaft) Includes all three gears, bearings and shims Click here to view part on Mercury Marine's website

43-878087A2 Gear Set 13-21 Teeth Std Rotation $444.00 Fits Alpha Gen II (exce Click here to view part on Mercury Marine's website

43-878617A2 Gear Set 14-28 Teeth Std Rotation $545.00 Fits Alpha Gen II (2.00 & 2.40 ratio) (s/n 0F80000 and above) Click here to view part on Mercury Marine's website

43-13730A1 Gear Set 14-28 Teeth Std Rotation $1398.00 Fits Alpha Gen II (2.40 ratio) (s/n 0D469859-0K999999) Click here to view part on Mercury Marine's website

43-13730A2 High Altitude Gear Kit $1430.00 Converts lower gearcase with 13/24 gears (1.62:1 ratio) to 14/28 gears (2.0:1 ratio) This allows for a higher overall drive ratio. Fits Alpha Gen II (s/n 0F680000 and above) with 13/24 gears Click here to view part on Mercury Marine's website

43-828071A1 Gear Kit 13-21 Teeth Counter Rotation (LH) $878.00 Fits MR, Alpha One & Gen II (C/R) (s/n 0F679999 and below) Click here to view part on Mercury Marine's website

43-828289A1 Gear Set 13-21 Teeth Counter Rotation (LH) $545.00 Fits Alpha Gen II (C/R)(except 2.00 ratio) (s/n 0F680000 and above) Click here to view part on Mercury Marine's website

43-855651A1 Gear Kit 14-28 Teeth Counter Rotation (LH) $355.00 Fits Alpha Gen II (2.00 ratio) (s/n 0L100040 and above) Click here to view part on Mercury Marine's website

43-92320T Reverse Gear 28 Teeth Fits R drive $278.00 Click here to view part on Mercury Marine's website

43-828073A1 Reverse Gear 21 Teeth Fits Alpha Gen II $119.00 Click here to view part on Mercury Marine's website

43-824109A1 MR and Alpha One Reverse Gear $482.00 Click here to view part on Mercury Marine's website

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.

For a complete listing of all Upper Gears and Upper Gear Kits, click HERE.
For a complete listing of all Lower Gears and Lower Gear Kits, click HERE.

43-803108T 1 27-29 teeth Fits Bravo One 1.36, Bravo II and III 1.81
(s/n 0B664190-0F345867)(1988-1995) $1176.10

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) $1176.05

43-803109T 1 23-30 teeth Fits Bravo One 1.65, Bravo II and Bravo III 2.20
(s/n 0B664190-0F345867)(1988-1995) $1176.10

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.

For a complete listing of all Upper Gears and Upper Gear Kits, click HERE.
For a complete listing of all Lower Gears and Lower Gear Kits, click HERE.

43-803111T 1 27-29 teeth $1078.80
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 $1078.80
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 $1078.80
Fits Bravo One 1.65, Bravo Two 2.20 and Bravo Three 2.20 and 2.43 (s/n 0F345868-0L999999)(1995-1999)

Mercruiser Sterndrive Parts. Pre-Alpha, R, MR and MC1 Parts Alpha One Parts Seal Kits Alpha One Gimbal (Transom) Parts and Kits Alpha Gen II Parts Alpha Gen II Gimbal (Transom) Parts and Kits Bravo One Parts Bravo Two Parts Bravo Three Parts Bravo Gimbal (Transom) Parts and Kits TR and TRS Parts Transom Seal Kits Gimbal Bearings Shift Cable Kits Gear Kits Shift Interuptor Switch Kits Anodes and Zinc Kits Water Pump Kits Power Trim Pump Kits and Trim System Parts Decal Sets Sterndrive Special Tools Mercruiser shop Manuals Propellers Remote Controls Gauges Trim Sender Switches Trim Cylinder Assemblies

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