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Lower Gear Housing Gear Kits and Sets

    Insist on ONLY Original Factory Parts

Click on the item reference number to add the item to your shopping cart.

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.

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.

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 $995.00
Click here to view part on Mercury Marine's website


43-803069T1 Gear Kit Fits Std Rot (RH) $1255.00
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) $1270.00 Very limited supply
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) $850.00
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) $1340.00 Very limited supply
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) $1120.00 Very limited supply
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) $823.00
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) $762.00
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) $483.00
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 $655.00
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 $440.00
Fits Alpha Gen II (exce
Click here to view part on Mercury Marine's website


43-878617A2 Gear Set 14-28 Teeth Std Rotation $505.00
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 Very limited supply
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 $1397.00
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) $504.00
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) $360.00
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 $286.005
Click here to view part on Mercury Marine's website


43-828073A1 Reverse Gear 21 Teeth Fits Alpha Gen II $120.00
Click here to view part on Mercury Marine's website


43-824109A1 MR and Alpha One Reverse Gear $485.00
Click here to view part on Mercury Marine's website




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