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Mercruiser Alpha One Upper Gear Sets
Number of teeth may differ
    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.

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 $ 474.00
43-45814A5 Gear Kit 1.65:1 Ratio 24-24 $ 458.00
43-75325A3 Gear Kit 1.84:1 Ratio 17-19 $ 450.00
43-18411A2 Gear Kit 1.50:1 Ratio 20-22 $ 620.00
43-66773A3 ss to 8M0080756 Gear Kit 1.32:1 Ratio 16-20 $ 704.00
43-18411A4 Gear Kit Comp with bearings and shims
replaces 1.50:1 Heavy Duty Kit
20-22 $ 914.00

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
43-803115T1 16-20 teeth 1.32 Ratio (1983-1990) $968.00
43-803116T1 20-22 teeth 1.50 Ratio (1983-1990) $859.00
43-803112T1 24-24 teeth 1.65 Ratio (1983-1990) $855.00
43-803114T1 17-19 teeth 1.84 Ratio (1983-1990) $735.00
43-803101T1 20-24 teeth 1.98 Ratio (1983-1990) $854.00

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