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Replacement Sterndrive Units for Mercruiser R/MR/Alpha One, SE106 Upper & Lower Assemblies

Replacement Sterndrive Units for Mercruiser R/MR/Alpha One, SE106 Upper & Lower Assemblies
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$648.15 - $1,302.47

Replacement Sterndrive Units for Mercruiser R, MR, and Alpha One I/O drives to get your boat back on the water. Complete SE106 Upper & Lower Assembly units available and backed with a best in the business, three year unlimited, fault free warranty.

  • Precision engineered and extremely cost-effective
  • SE106 Units replace Mercruiser R, MR & Alpha One sterndrives (1973 to 1990)
  • 1.47, 1.62, 1.81 & 1.94 gear ratios available
  • Assemblies available in "old style" & counter rotation
  • Includes all of the internal parts & are fully compatible and interchangeable with the OEM drives
  • Comes with a 9-9/16 new style input yoke
  • Does not include Complete Install Kit or Anode Kit - ordered separately

The three year fault-free warranty covers any damage to the drive that requires it to be repaired or replaced.

Drive units coupled to engines over 300 HP voids the warranty and are not subject to any warranty claims

Part No. Mfr No. Description Ratio Unit Leaves Warehouse* List Price
Your Price
Qty.
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Complete Upper & Lower Assembly, SE106, 1.47 Ratio
156328 90-106-01D / 90-106-02 Complete Upper and Lower 1.47 Each 2 Days $1,390.00
$1,302.47
 
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Complete Upper & Lower Assembly, SE106, 1.81 Ratio
156341 90-106-01B / 90-106-02 Complete Upper and Lower 1.81 Each 2 Days $1,390.00
$1,295.00
 
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Complete Upper & Lower Assembly, Pre - 1982, SE104, 1.94 Ratio
204015 90-104-01A / 90-106-02 Complete Upper and Lower, Pre 1982 1.94 Each 2 Days $1,390.00
$1,302.47
 
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Complete Upper & Lower Assembly, SE106, 1.94 Ratio
156342 90-106-01A / 90-106-02 Complete Upper and Lower 1.94 Each 2 Days $1,390.00
$1,295.00
 
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Upper Assembly Only, SE106, 1.47 Ratio
167484 90-106-01D Upper Assembly Only 1.47 Each 2 Days $701.95
$648.15
 
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Upper Assembly Only SE106, 1.81 Ratio
475201 90-104-01B Upper Assembly Only 1.81 Each 2 Days $701.95
$648.15
 
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Upper Assembly Only, SE106, 1.94 Ratio
484081 90-106-01A Upper Assembly Only 1.94 Each 2 Days $701.95
$648.15
 
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Complete Upper & Lower Assembly, SE106, 1.62 Ratio
156340 90-104-01C / 90-106-02 Complete Upper and Lower Early 165 hp. 1.62 Each 2 Days $1,390.00
$1,302.47
 
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Lower Assembly Only, SE106, All Ratios
203396 90-106-02 Lower Assembly Only All Each 2 Days $745.00
$744.05
 
Replacement Mercruiser Counter Rotating Alpha One Sterndrive, Lower Assembly Only, SE108, All Ratios
488664 90-108-02 Lower Assembly Only All Each In-Stock
(Ships In: 1 - 2 Days)
$1,063.66
$982.14
 
* Leaves Warehouse: Does not include Weekends and Holidays.
When will my order arrive? Add the Estimated Leaves Warehouse Time + Estimated Shipping Time.
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Additional Description

These are new, not remanufactured, built to Mercruiser specification drives and provide direct replacements for damaged or worn Mercruiser Sterndrive Assemblies.

  • Ships in two boxes
  • Back in 2006 Sterndrive Engineering Inc. (SEI), Clearwater, Florida, announced that the warranty on it's sterndrives was upgraded from a one year limited warranty to a three year fault-free warranty.

    "We believe this new warranty is the best in the sterndrive industry. Nobody that we know of offers a three year fault-free warranty on sterndrives. After selling tens of thousands of these drives over the past three years and doing extensive testing at our research facility, we are very confident in the product. It's only natural at this point to extend our warranty.”
    Justin Webb, SEI General Manager.

    The three year fault-free warranty covers any damage to the drive that requires it to be repaired or replaced including failures resulting from lack of oil, fishing line, impact, neglect, and other abuse.

    Accessories, Related Items, Spare Parts, ...

    Complete Installation Kit, SE106

    Complete Installation Kit, SE106

    Mfr. Sterndrive Engineering (SEI) | Mfr No. 90-106-03K

    Used with above Part#: 156340, 156341, 156342
    $54.69


    View Details

    Review and FAQ Center


    Question
    Out drives

    I have a SeaRay 300 sundancer with twin 350 engines . Both lower units run clockwise and believe one is suppose to be counter. It’s an 86 model and want your suggestions on out drives. Gear is 150 . Do I need to go up or down or stay same. Thanks

    Submitted by: Mike Clayton
    Answer

    You do not want to change ratios so the one you need is our 1.47unit. Most boats do come with opposite rotations but it is not necessary unless you feel the boat does not handle like you think it should.

    If it was me and everything was fine I would keep them the same rotation, it will simplify things in the long run with props gears etc.

    Let me know if you need further assistance

    Question
    replace lower drive?

    I just bought a 1993 chaparral 2050 slc with a 4.3l v6 and alpha one outdrive. third day on the water the outdrive failed. how do I know its only the lower drive? I checked and its still shifting so I know its not the cable and the prop spins very easily in either direction if that makes a difference. I would like to order the lower drive only if I can?
    thanks
    New to boating

    Submitted by: jmp
    Answer

    If you are sure the top end is good then you can certainly order just the lower. The link below will take you there.

    Replacement for Mercruiser Gen II Sterndrive Unit, Complete Upper & Lower Assembly

    Question
    How much horsepower can this drive support?

    How much horsepower can this drive support? 300hp voids the warranty but?

    Submitted by: Rodger
    Answer

    As is pointed out, 300 HP+ voids warranty. They may handle up to 350 HP for short duration.

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    pid: 156328F