Sterndrive Engineering

SEI outdrives offer reliable performance and value for boaters seeking replacement sterndrives. Engineered to match OEM specifications, these units are easy to install and built for durability. Ideal for restoring propulsion systems, SEI outdrives are backed by strong warranties and support.

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Replacement for Mercruiser Gen II Sterndrive Unit, Complete Upper & Lower Assembly, SE116Replacement for Mercruiser Gen II Sterndrive Unit, Complete Upper & Lower Assembly, SE116
Replacement for Mercruiser Gen II Sterndrive Unit, Complete Upper & Lower Assembly, SE116
From $2,150.50
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Small Frame Alternator, Mercury Mercruiser, 12 volt, 70 and 100 amp, 20119
Small Frame Alternator, Mercury Mercruiser, 12 volt, 70 and 100 amp, 20119
From $217.80
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Small Frame Alternator, 12 volt, 78 & 120 amp, 20020 DR
Small Frame Alternator, 12 volt, 78 & 120 amp, 20020 DR
From $305.80
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Small Frame Alternator, Mercruiser, OMC, Volvo Mando Style, 2" Mounting Feet, 12 volt
Small Frame Alternator, Mercruiser, OMC, Volvo Mando Style, 2" Mounting Feet, 12 volt
From $178.00
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Delco Style Alternators, Diesel Only, 78 Amp or 94 Amp, 20019
Delco Style Alternators, Diesel Only, 78 Amp or 94 Amp, 20019
From $283.80
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SEI Hydro-Hatch Replacement Hydraulic CylinderSEI Hydro-Hatch Replacement Hydraulic Cylinder
SEI Hydro-Hatch Replacement Hydraulic Cylinder
From $305.80
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Alternator, Pleasurecraft, 12 Volt, 70 Amp, 2" Mount Foot, 6-Groove 50mm Serp. Pulley, Replaces PCM # RA097007A
Alternator, Pleasurecraft, 12 Volt, 70 Amp, 2" Mount Foot, 6-Groove 50mm Serp. Pulley, Replaces PCM # RA097007A
$239.80
Trim Pump Alpha One, 1986-Present, Replaces OE 865380A25
Trim Pump Alpha One, 1986-Present, Replaces OE 865380A25
$330.00
Outboard Tilt/Trim Unit, Mercury/Mariner 3-Ram, 3-Wire,1985-Present
Outboard Tilt/Trim Unit, Mercury/Mariner 3-Ram, 3-Wire,1985-Present
$988.90
SEI, SE106, Replacement Sterndrive, Upper Assembly, Short Yoke, 1.62SEI, SE106, Replacement Sterndrive, Upper Assembly, Short Yoke, 1.62
SEI, SE106, Replacement Sterndrive, Upper Assembly, Short Yoke, 1.62
$964.12
SEI, SE106, Replacement Sterndrive, Short Yoke, Complete, 1.62 Counter RotationSEI, SE106, Replacement Sterndrive, Short Yoke, Complete, 1.62 Counter Rotation
SEI, SE106, Replacement Sterndrive, Short Yoke, Complete, 1.62 Counter Rotation
$2,150.50
SEI Mercruiser Alpha 1 Gen 2 Transom Assembly & Gimbal Housing, 9F-116SEI Mercruiser Alpha 1 Gen 2 Transom Assembly & Gimbal Housing, 9F-116
SEI Mercruiser Alpha 1 Gen 2 Transom Assembly & Gimbal Housing, 9F-116
$2,062.50
Aluminum Anode Kit, Gen II Sterndrives (1991-Present), Flat Style<br>
Aluminum Anode Kit, Gen II Sterndrives (1991-Present), Flat Style
$74.57
Zinc Anode Kit, Gen II Sterndrives (1991-Present), Flat Style<br>
Zinc Anode Kit, Gen II Sterndrives (1991-Present), Flat Style
$76.21
Hardware Kit for External Line Cylinders Pre-Alpha (1970-1982)
Hardware Kit for External Line Cylinders Pre-Alpha (1970-1982)
$82.50
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Upper Assembly Only SE106, 1.81 RatioReplacement Mercruiser R/MR/Alpha One Sterndrive Unit, Upper Assembly Only SE106, 1.81 Ratio
Replacement Mercruiser R/MR/Alpha One Sterndrive Unit, Upper Assembly Only SE106, 1.81 Ratio
$964.12
Short Input Yoke (8-1/8") for Alpha One, Gen I (1972-1990)
Short Input Yoke (8-1/8") for Alpha One, Gen I (1972-1990)
$108.60
SEI, SE106, Replacement Sterndrive, 1.62SEI, SE106, Replacement Sterndrive, 1.62
SEI, SE106, Replacement Sterndrive, 1.62
$1,930.50
SEI, SE106, Replacement Sterndrive, Upper Assembly, 1.94SEI, SE106, Replacement Sterndrive, Upper Assembly, 1.94
SEI, SE106, Replacement Sterndrive, Upper Assembly, 1.94
$964.12
SEI, SE106, Replacement Sterndrive, Upper Assembly, Short Yoke, 1.81SEI, SE106, Replacement Sterndrive, Upper Assembly, Short Yoke, 1.81
SEI, SE106, Replacement Sterndrive, Upper Assembly, Short Yoke, 1.81
$964.12
Zinc Anode Kit, Gen II Sterndrives (1991-Present), Fin Style
Zinc Anode Kit, Gen II Sterndrives (1991-Present), Fin Style
$62.48
Complete Installation Kit, SE116
Complete Installation Kit, SE116
$49.50
Replacement Mercruiser R/MR/Alpha One Sterndrive, Complete Upper & Lower Assembly, Pre-1982, SE104, 1.94 Ratio, Short Yoke
Replacement Mercruiser R/MR/Alpha One Sterndrive, Complete Upper & Lower Assembly, Pre-1982, SE104, 1.94 Ratio, Short Yoke
$1,930.50
SEI, SE106, Replacement Sterndrive, Lower Assembly, Std. RotationSEI, SE106, Replacement Sterndrive, Lower Assembly, Std. Rotation
SEI, SE106, Replacement Sterndrive, Lower Assembly, Std. Rotation
$1,072.50

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