Counter Rotation Complete Outdrives 1973-1990
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New, Not Rebuilt! The same great features, tremendous quality, and low price as in Sterndrive Engineering's standard-rotation SE-106, but in a COUNTER-ROTATION model (CR) for boats with twin engines. The CR outdrive is almost always on the port (left) engine in dual engine boats. Ships in 2 boxes. Counter Rotation only. Do not use for Standard Rotation. Does not include Complete Install Kit or Anode Kit, which can be ordered separately.
To check for the proper gear ratio for your sterndrive, please reference table below:
| Boat Engine Size | Sterndrive Gear Ratio |
|---|---|
| 350 cubic inch, 5.7 liter, 350 MAG, 5.0 EFI engines | 1.47 ratio, 1.50 ratio |
| Carbureted 305 cubic inch, 5.0 liter carb, 4.3 liter EFI and Inline 6 engines |
1.62 ratio, 1.65 ratio |
| 4.3 liter V-6 engines with carb | 1.81 ratio, 1.84 ratio |
| 3.7 liter and 470, 485 and 488 4-cylinder engines | 1.81 ratio, 1.84 ratio |
| 120, 140, 3.0 liter engines | 1.94 ratio, 1.98 ratio |
Please note that Mercruiser changed their gear ratios somewhat in the mid-1980s (for example a V-8 gear ratio used to be 1.50, but Mercruiser now uses 1.47 ratio.)
Select the outdrive gear ratio based on your engine size.
1.47 or 1.50 Ratio Counter-Rotation Complete Outdrive, Replaces Alpha One Gen 1, R, MR
147CompleteCR
350 cubic inch, 5.7 liter, 350 MAG, 5.0 EFI engines. Comes with a 9-9/16 new style input yoke. Counter Rotation only. Do not use for Standard Rotation.
Our Price: $1,495.00
1.62 or 1.65 Ratio, Replaces Alpha One Gen 1 (1973-1990 model years)
162CompleteCR
Carbureted 305 cubic inch, 5.0 liter carb, 4.3 liter EFI and Inline 6 engines. Comes with a 9-9/16 new style input yoke. Counter Rotation only. Do not use for Standard Rotation.
Our Price: $1,495.00
1.62 or 1.65 Ratio Short Shaft Counter-Rotation, Replaces Alpha One Gen 1, R, MR
162oldstylecompletecr
This drive is generally used on older inline 6 and 4 cylinder engines. Comes with a 8-1/8 input yoke. Counter Rotation only. Do not use for Standard Rotation.
Our Price: $1,295.00
1.81 or 1.84 Ratio Short Shaft Counter-Rotation, Replaces Alpha One Gen 1 (1973-1990 model years)
181oldstylecompletecr
This drive is generally used on older inline 6 and 4 cylinder engines. Comes with a 8-1/8 input yoke. Counter Rotation only. Do not use for Standard Rotation.
Our Price: $1,295.00
1.81 or 1.84 Ratio Counter Rotation Outdrive, Replaces Alpha One Gen 1 (1973-1990 model years)
181CompleteCR
4.3 liter V-6 engines with carb. 3.7 liter and 470, 485 and 488 4-cylinder engines. Comes with a 9-9/16 new style input yoke. Counter Rotation only. Do not use for Standard Rotation.
Our Price: $1,495.00
1.94 or 1.98 Ratio Counter-Rotation Short Shaft , Replaces Alpha One Gen 1 (1973-1990 model years)
194oldstylecompletecr
This drive is generally used on older inline 6 and 4 cylinder engines. Comes with a 8-1/8 input yoke. Counter Rotation only. Do not use for Standard Rotation.
Our Price: $1,495.00
1.94 or 1.98 Ratio, Replaces Alpha One Gen 1 (1973-1990 model years)
194CompleteCR
120, 140, 3.0 liter engines. Comes with a 9-9/16 new style input yoke. Counter Rotation only. Do not use for Standard Rotation.
Our Price: $1,495.00
Call us toll-free at (866) 969-0441 anytime to place an order or if you have questions. We welcome the opportunity to help find the correct outdrive or any Sterndrive Engine boating part you may need.
Call us toll-free at 866-969-0441 to place an order or for assistance at any time. 
GetBoatGear.com is an authorized dealer for Sterndrive Engineering Marine products. Boating items we currently offer include complete, lower, and upper unit outdrives, outdrive install kits, transom repair parts, shift cables, anode kits, trim cylinders, trim cylinder hoses, and boat propellers. We welcome the opportunity to help find the parts and items you need for your boat.