Sterndrive Engineering Repl Mercruiser Drive Alpha One GenII Available in Standard Rotation and Counter Rotation (CR added to SKU number). 3 Year Warranty. Mounting gaskets and hardware not...Choose Options
Mercruiser Alpha One Replacement Upper Unit 1.81
FREQUENTLY BOUGHT TOGETHER
Total Price:Add to Cart
SternDrive Replacement Upper Unit for Mercruiser R, MR, Alpha One. 1.81 Ratio
- 1.81 Ratio also replaces 1.84 ratio
- For Alpha One Gen I Sterndrives (1972-1990)
- Comes with a 9-9/16" [new style] input yoke.
- 3 Year Manufacturer's Warranty
Item is subject to a 20% restocking fee (Boat Covers, Bimini Tops, Outdrives, Drop Ship Items and Special Order Parts)!
**Year, Serial Number, and Horsepower are required to order. Please contact us with this information after you place your order otherwise processing will be delayed.
Sterndrive Engineering Model Chart
Refer to Sterndrive Engineering's model chart below to find your proper Mercruiser Sterndrive Replacement. These are typical applications; it is best to confirm your ratio by couting the teeth in the upper. Although great care was taken in the creation of this guide, its accuracy cannot be guaranteed.
|Model||Year Range||Serial Range||Notes (See Below)||Standard Rotation||Counter Rotation|
|165||1970-1977||2763442 and up||2,4,5,6||1.62||1.62 CR|
|485||1980-1982||4893835 and up||2,4,5,6||1.81||1.81 CR|
|888||1971-1977||3106717 and up||4,5,6||1.47||1.47 CR|
- Unit has an 8 spline driveshaft on the lower unit. If your unit is original, you need to purchase a complete.
- Unit has a short yoke on the upper driveshaft. We refer to this as the “Old Style”
- ***Applies to all inline 4 and inline six cylinder engines up until and including 1982***
|Engine Configuration||Horsepower||Gear Ratio||Tooth Count||Standard Rotation||Counter Rotation|
|Inline 4 Cyl. 2.5L/3.0L||120,140||1.98/1.94||20/24||1.94||1.94 CR|
|Inline 4 Cyl. 3.7L||170||1.84/1.81||17/19||1.81||1.81 CR|
|Inline 6 Cyl.||160/165||1.65/1.62||24/24||1.62||1.62 CR|
|V6 4.3L||185/190||1.84/1.81||17/19||1.81||1.81 CR|
|V8 305 2 Barrel Carb.||200||1.65/1.62||24/24||1.62||1.62 CR|
|V8 305/350||230/260||1.50/1.47||20/22||1.47||1.47 CR|
California Residents: WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov
QUESTIONS & ANSWERS
- Google Product Type:
- Engine Parts
- Product MPN:
Customers Also Viewed
Sterndrive Engineering SE106 Replacement Mercruiser Drive R, MR, Alpha One Complete Replacement Outdrive for Mercruiser R, MR, and Alpha One. 1972 - 1990. Please verify your serial number to be sure...Choose Options
Sterndrive Engineering Mercruiser Alpha One Replacement Upper Unit 1.81 Ratio w/ Short Yoke 1.81 ratio also replaces the 1.84 ratio Comes with an [old style] 8-1/8" input yoke. This drive is...Choose Options
Sterndrive Engineering Replacement Drive, Old Style R , MR , Alpha One Replaces most Mercruiser Sterndrives 160/165 HP from 1967-1977 Comes with a 8-1/8 old style input yoke Ships in two...Choose Options
Sterndrive Replacement Upper Unit for Mercruiser R, MR, Alpha One 1.62 Ratio 1.62 Ratio also replaces 1.65 ratio Comes with a 9-9/16" [new style] input yoke. For Alpha One Gen I Sterndrives...Choose Options
Sterndrive Engineering Mercruiser Gen II Replacement Upper Unit 1.81 Ratio Replacement Upper Unit for Mercruiser Alpha One Gen II Sterndrives 1991- Current. SE116 1.81 Ratio replaces the 1...Choose Options
Sterndrive Engineering Replacement Lower Unit Mercruiser Alpha One Gen II Lower unit replacements are an expensive headache for any boat owner. A Sterndrive Engineering Replacement Lower Unit...Choose Options