602-91-205-912K Includes all gaskets, seals, bearings, gears and shafts for the lower unit.
Fits most inline (metric) 3 & 4 cylinder Mercury/Mariner engines.
70-115 HP.
Direct injected engines only (OPTIMAX).
2.07:1 gear ratio (14/29 tooth count).
For "six jaw" reverse gear units only>
2004-current
25" driveshaft COMPLETE KIT 25" Fits Mercury Repair Kit 91-205-912K
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602-91-205-913K Includes all gaskets, seals, bearings, gears and shafts for the lower unit.
Fits most inline (metric) 3 & 4 cylinder Mercury/Mariner engines.
70-115 HP.
Direct injected engines only (OPTIMAX).
2.33:1 gear ratio (13/30 tooth count).
For "six jaw" reverse gear units only>
2004-current
25" driveshaft COMPLETE KIT 25" Fits Mercury Repair Kit 91-205-913K
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602-91-205-914K Includes all gaskets, seals, bearings, gears and shafts for the lower unit.
Fits most 3 & 4 cylinder, 4 stroke Mercury/Mariner.
75-115 HP.
2001 - 2005
25" driveshaft with 18 splines (spline dia. = .760").
2.07:1 ratio (14/29 tooth count). COMPLETE KIT 25" Fits Mercury Repair Kit 91-205-914K
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602-91-205-915K Includes all gaskets, seals, bearings, gears and shafts for the lower unit.
Fits most 3 & 4 cylinder, 4 stroke Mercury/Mariner.
75-115 HP.
2001 - 2005
25" driveshaft with 18 splines (spline dia. = .760").
2.33:1 ratio (13/30 tooth count). COMPLETE KIT 25" Fits Mercury Repair Kit 91-205-915K
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602-91-205-916K Includes all gaskets, seals, bearings, gears and shafts for the lower unit.
Fits most 3 cylinder, 4 stroke Mercury/Mariner.
40-60 HP with 4.250" diameter (Bigfoot) gearcase.
2002 - current
25" driveshaft with 17 splines (spline dia. = .748").
2.33:1 ratio (13/30 tooth count). COMPLETE KIT 25" Fits Mercury Repair Kit 91-205-916K
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602-91-106-600K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.50 gear ratios only.
For use with 1-25/32" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-600K
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602-91-106-601K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.50 gear ratios only.
For use with 1-15/16" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-601K
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602-91-106-602K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.81 gear ratios only.
For use with 1-25/32" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-602K
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602-91-106-603K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.94 gear ratios only.
For use with 1-25/32" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-603K
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602-91-106-605K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.65 gear ratios only.
Uses SEI's exclusive heavy duty gear set. Recommended for V8 engines.
For use with 1-25/32" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-605K
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602-91-106-606K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.81 gear ratios only.
For use with 1-15/16" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-606K
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602-91-106-607K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.94 gear ratios only.
For use with 1-15/16" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-607K
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602-91-106-608K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.65 gear ratios only.
For use with 1-15/16" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-608K
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602-91-106-609K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.65 gear ratios only.
Uses SEI's exclusive heavy duty gear set. Recommended for V8 engines.
For use with 1-15/16" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-609K
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602-91-106-610K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.81 gear ratios only.
For use with 1-25/32" OD top cap bearing.
8-1/8" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-610K
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602-91-106-611K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.94 gear ratios only.
For use with 1-25/32" OD top cap bearing.
8-1/8" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-611K
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602-91-106-612K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.65 gear ratios only.
For use with 1-25/32" OD top cap bearing.
8-1/8" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-612K
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602-91-106-613K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.65 gear ratios only.
Uses SEI's exclusive heavy duty gear set. Recommended for V8 engines.
For use with 1-25/32" OD top cap bearing.
8-1/8" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-613K
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602-91-106-614K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.65 gear ratios only.
For use with 1-25/32" OD top cap bearing.
9-9/16" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-614K
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602-91-106-615K Includes all seals, o'rings, bearings, gears and shafts for the upper unit.
Fits most Mercruiser I, R, MR and Alpha I upper units.
1973-1990.
For 1.94 gear ratios only.
For use with 1-15/16" OD top cap bearing.
8-1/8" long input yoke. COMPLETE KIT Fits Mercruiser Repair kit 91-106-615K
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