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51 Products
Mercruiser Aftermarket Replacement Sterndrive Units
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51 Products
SKU: 567315
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-121-01A, 90-121-02, COMPLETE2
SKU: 567316
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-121-01C, 90-121-02, COMPLETE2
SKU: 567314
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-121-01A, 90-122-02, COMPLETE2
SKU: 567313
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-121-01B, 90-122-02, COMPLETE2
SKU: 567312
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-121-01B, 90-121-02, COMPLETE2
SKU: 567307
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-121-01C, 90-122-02, COMPLETE2
Mfr: STERNDRIVE ENGINEERING
Mfr: STERNDRIVE ENGINEERING
SKU: 156342
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01A / 90-106-02
SKU: 204015
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-104-01A / 90-106-02
SKU: 167484
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01D
SKU: 156328
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01D / 90-106-02
SKU: 494056
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01C
SKU: 494183
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01C / 90-106-02
SKU: 156340
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-104-01C / 90-106-02
SKU: 526708
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01B
SKU: 156341
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01B / 90-106-02
SKU: 475201
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-104-01B
SKU: 484081
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-01A
SKU: 203396
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-106-02
SKU: 488664
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 90-108-02
Mfr: STERNDRIVE ENGINEERING
SKU: 162332
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Mfr: STERNDRIVE ENGINEERING
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Mfg# 9B-102A
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)
Engine | HP | Liters/CID | Cylinders | Gear Ratio | Tooth Count | Year |
---|---|---|---|---|---|---|
2.5 Liter | 120 | 2.5/153 | 4 | 1.98 | 20-24 | 1969-1983 |
2.5 Liter | 130 | 2.5/153 | 4 | 1.98 | 20-24 | 1969-1983 |
165 | 165 | 3.7/224 | 6 | 1.65 | 24-24 | 1969-1983 |
470 | 170 – 190 | 4.3/262 | 4 | 1.84 | 17-19 | 1969-1983 |
215 – 233 | 205 – 230 | 351 | 8 | 1.5 | 20-22 | 1969-1983 |
260 | 260 | 5.7/350 | 8 | 1.5 | 20-22 | 1969-1983 |
Mercruiser Alpha 1 (1984 – 1990 Models)
Engine | HP | Liters/CID | Cylinders | Gear Ratio | Tooth Count | Year |
---|---|---|---|---|---|---|
2.5 Liter | 120 | 2.5/153 | 4 | 1.98 | 20-24 | 1984-1990 |
3 Liter | 130 | 3.0/181 | 4 | 1.98 | 20-24 | 1984-1990 |
165 | 165 | 3.7/224 | 4 | 1.84 | 17-19 | 1984-1990 |
175 | 175 | 4.3/262 | 6 | 1.84 | 17-19 | 1984-1990 |
180, 190, 470 | 180 | 3.7/224 | 4 | 1.84 | 17-19 | 1984-1990 |
200 | 200 | 5.0/305 | 8 | 1.65 | 24-24 | 1984-1990 |
205 | 205 | 4.3/262 | 6 | 1.84 | 17-19 | 1984-1990 |
230 | 230 | 5.0/305 | 8 | 1.5 | 20-22 | 1984-1990 |
260 | 260 | 5.7/350 | 8 | 1.5 | 20-22 | 1984-1990 |
350 Magnum | 270 | 5.7/350 | 8 | 1.5 | 20-22 | 1984-1990 |
Mercruiser Alpha 1 Gen 2 (1991 & Newer)
Engine | HP | Liters/CID | Cylinders | Gear Ratio | Tooth Count | Year |
---|---|---|---|---|---|---|
3 Liter | 130 | 3.0/181 | 4 | 2.0 | 24-24 | 1998-2005 |
3 Liter | 130 | 3.0/181 | 4 | 1.94 | 20-24 | 1991-2005 |
4.3 Liter | 175 | 4.3/262 | 6 | 1.81 | 17-19 | 1991-2005 |
5.0 Liter | 230 | 5.0/305 | 8 | 1.61 | 24-24 | 1991-2005 |
5.7 Liter | 260 | 5.7/350 | 8 | 1.47 | 20-22 | 1991-2005 |