Mercruiser Aftermarket Replacement Sterndrive Units

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37 Products

$1,705.00
SEI, SE106, Replacement Sterndrive, 1.94
SKU: 156342
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01A / 90-106-02
$875.00
SEI, SE106, Replacement Sterndrive, Upper Assembly, 1.47
SKU: 167484
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01D
$1,705.00
SEI, SE106, Replacement Sterndrive, 1.47
SKU: 156328
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01D / 90-106-02
$875.00
SEI, SE106, Replacement Sterndrive, Upper Assembly, 1.62
SKU: 494056
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01C
$1,705.00
SEI, SE106, Replacement Sterndrive, 1.62
SKU: 494183
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01C / 90-106-02
$1,705.00
SEI, SE106, Replacement Sterndrive, Short Yoke, 1.62
SKU: 156340
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-104-01C / 90-106-02
$875.00
SEI, SE106, Replacement Sterndrive, Upper Assembly, 1.81
SKU: 526708
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01B
$1,705.00
SEI, SE106, Replacement Sterndrive, 1.81
SKU: 156341
|
Mfr: STERNDRIVE ENGINEERING
|
Mfg# 90-106-01B / 90-106-02
$875.00
SEI, SE106, Replacement Sterndrive, Upper Assembly, Short Yoke, 1.81
SKU: 475201
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-104-01B
$875.00
SEI, SE106, Replacement Sterndrive, Upper Assembly, 1.94
SKU: 484081
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01A
$975.00
SEI, SE106, Replacement Sterndrive, Lower Assembly
SKU: 203396
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-02
$1,175.00
SEI, SE108, Replacement Sterndrive, Counter Rotating, Lower Assembly
SKU: 488664
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-108-02
$105.00
Trim Cylinder Hose Kit 9B-102A for Alpha I Gen I Sterndrives (1972-1990)
SKU: 162332
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 9B-102A
$75.00
Hardware Kit for External Line Cylinders Pre-Alpha (1970-1982)
SKU: 526714
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 9B-102B
$105.00
Trim Cylinder Hose Kit 9B-104A for Alpha I (15-9/16") & Bravo Sterndrives
SKU: 162335
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 9B-104A
$56.80
Zinc Anode Kit for SE116 Alpha I, Gen II Sterndrives (1991-Present), Fin Style
SKU: 462813
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-116-05K
$98.73
Short Input Yoke (8-1/8") for Alpha One, Gen I (1972-1990)
SKU: 494724
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 92-102-06F
$55.00
Complete Installation Kit, SE106
SKU: 156347
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-03K
$69.28
Complete Zinc Anode Kit for SE116 Alpha I, Gen II Sterndrives (1991-Present), Flat Style
SKU: 527312
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-116-05TK

 

How to Select The Right Sterndrive for Your Boat

 

When it comes to your sterndrive ( also known as an outdrive ), it is good practice to inspect and service it annually, that way you can be on the lookout for any possible issues that may arise, and get them fixed before a catastrophic event requires expensive repairs or replacements.

 

A couple of things to look for are water intrusion caused by either a bad seal or a bad drain vent / drain plug gasket failure. The color of the oil will be a milky or chocolate colored when water is present. The other thing to look for is metal or fine metallic shavings in the oil, which are from signs of wear to the bearings and gears. If there is an excessive amount, then it may be time to consider having the sterndrive looked at by a certified marine mechanic so as to determine if it is cost effective to have it repaired or just replaced.

 

 

When replacing your sterndrive, you will want to make sure you are purchasing the correct one. Make sure that the gear ratio and the rotation match what your engine manufacturer recommends. There are several different gear ratios available which depend on engine horsepower and displacement.

 

When ordering a sterndrive, it is also advised to have your engine serial number or model number available when contacting us. This will help with identifying the correct model type or year. MerCruiser stamps their serial number in the decal on the upper gear box next to the gear ratio. If it is not visible, and you are not sure which gear ratio to purchase, you can remove the cap that is held down by 4 bolts on the upper gear box and count the number of teeth that are on each of the two gears inside. Below are charts available that convert the number of teeth into the correct gear ratio.

 

Mercruiser R-Style Sterndrives (1969 – 1983)

EngineHPLiters/CIDCylindersGear RatioTooth CountYear
2.5 Liter1202.5/15341.9820-241969-1983
2.5 Liter1302.5/15341.9820-241969-1983
1651653.7/22461.6524-241969-1983
470170 – 1904.3/26241.8417-191969-1983
215 – 233205 – 23035181.520-221969-1983
2602605.7/35081.520-221969-1983

Mercruiser Alpha 1 (1984 – 1990 Models)

EngineHPLiters/CIDCylindersGear RatioTooth CountYear
2.5 Liter1202.5/15341.9820-241984-1990
3 Liter1303.0/18141.9820-241984-1990
1651653.7/22441.8417-191984-1990
1751754.3/26261.8417-191984-1990
180, 190, 4701803.7/22441.8417-191984-1990
2002005.0/30581.6524-241984-1990
2052054.3/26261.8417-191984-1990
2302305.0/30581.520-221984-1990
2602605.7/35081.520-221984-1990
350 Magnum2705.7/35081.520-221984-1990

Mercruiser Alpha 1 Gen 2 (1991 & Newer)

EngineHPLiters/CIDCylindersGear RatioTooth CountYear
3 Liter1303.0/18142.024-241998-2005
3 Liter1303.0/18141.9420-241991-2005
4.3 Liter1754.3/26261.8117-191991-2005
5.0 Liter2305.0/30581.6124-241991-2005
5.7 Liter2605.7/35081.4720-221991-2005