SEI New SEI / MerCruiser Alpha One Upper Gear Set (1972–1990) – 3.0L 4-Cylinder – 1.94 / 2.40 Ratio – Replaces OEM 43-55778A3 MSRP: Was: Now: $241.31 Choose Options
SEI New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II Lower Unit Clutch Dog (1973–Present) – Replaces OEM #52-853594T & 52-853594 MSRP: Was: Now: $112.03 Choose Options
SEI New SEI / Mercruiser 1972-1990 Alpha 1 Upper Sterndrive Assembly (9 9/16" Input Yoke) # 90-106-01A MSRP: Was: Now: $965.00 Choose Options
SEI New SEI / Mercruiser 1972-1990 Alpha 1 Upper Sterndrive Assembly (8 1/8" Short Yoke) MSRP: Was: Now: $965.00 Choose Options
SEI New SEI / Mercruiser 1972-1990 Alpha 1 4 CYL, V6 and V8 Counter-Rotation Gearcase MSRP: Was: Now: $1,175.00 Choose Options
SEI New SEI / Mercruiser Alpha 1 1972-1990 4 CYL, V6 & V8 Sterndrive Gearcase MSRP: Was: Now: $1,065.99 Choose Options
SEI New SEI / MerCruiser MR & Alpha One Driveshaft (1982–1990) – Fits Serial #0D469858 & Below – Replaces OEM 45-42634 MSRP: Was: Now: $320.16 Choose Options
SEI New SEI / MerCruiser Alpha One Counter-Rotation Propshaft (1972–1990) – Replaces OEM 814606-1 MSRP: Was: Now: $330.97 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II Ratcheting Shift Spool (1972–Present) – Fits I, R, MR, Alpha I & Gen II Drives – Replaces OEM 818349T1 MSRP: Was: Now: $55.99 Choose Options
SEI New SEI / MerCruiser Alpha One Shift Shaft (1973–1990) – Fits I, R, MR, and Alpha I Drives – Replaces OEM 77481-1 MSRP: Was: Now: $30.88 Choose Options
SEI New SEI / MerCruiser Alpha One Complete U-Joint Assembly with Short Yoke (1972–1982) – Fits Inline 4 & Inline 6 Engines – Replaces OEM 58858A1 MSRP: Was: Now: $305.95 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II Complete U-Joint Assembly (1972–Present) – Replaces OEM 814819A2 – Fits 9-9/16" Engine End Yoke MSRP: Was: Now: $321.46 Choose Options
SEI New SEI / MerCruiser Alpha One Short Input Yoke Shaft (1972–1990) – 8-1/8" – Fits Inline 4 & Inline 6 Engines – Replaces OEM 39385A1 MSRP: Was: Now: $108.60 Choose Options
SEI New SEI / MerCruiser Alpha One Heavy Duty U-Joint (1970–1997) – Greasable – Replaces OEM 3850812 / 75832T1 – Also Fits OMC Cobra & Volvo Penta SX MSRP: Was: Now: $36.70 Add to Cart
SEI New SEI / MerCruiser Alpha One H-Yoke (1972–1990) – Replaces OEM 0912213 – Serial Numbers OK999999 and Below MSRP: Was: Now: $47.95 Choose Options
SEI New SEI / MerCruiser Alpha One Short Yoke Shaft (1972–1997) – Replaces OEM 46020 1 – Serial Numbers OK999999 and Below MSRP: Was: Now: $74.13 Choose Options
SEI New SEI / MerCruiser Alpha One Engine End Yoke Shaft (1972–1990) – 9-9/16" – Replaces OEM 0912212 / 814819A3 MSRP: Was: Now: $101.81 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II 6-Jaw Propshaft (1972–Present) – Standard Rotation – Replaces OEM 44-850308 / 44-824110 MSRP: Was: Now: $330.97 Choose Options
SEI New SEI / MerCruiser Alpha One Driveshaft (1972–1990) – Replaces OEM 45-55796 – Not for Gen II Drives MSRP: Was: Now: $80.07 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II Stainless Trim Pump Assembly (1986–Present) – Replaces OEM 865380A25 MSRP: Was: Now: $440.00 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II Trim Pump Assembly (1986–Present) – Replaces OEM 865380A25 MSRP: Was: Now: $330.00 Choose Options
SEI New SEI / Mercruiser Alpha 1 Gen II 4-CYL/V6/V8 Complete Sterndrive Assembly (1991-2003) MSRP: Was: Now: $1,935.00 Choose Options
SEI New SEI / Mercruiser 1972-1990 4-CYL/V6/V8 R/MR/ & Alpha 1 Complete Sterndrive Assembly MSRP: Was: Now: $1,935.00 Choose Options
SEI New SEI / Mercruiser 1972-1982 4-CYL/V6/V8 R/MR/ & Alpha 1 (Short Yoke) Complete Sterndrive Assembly MSRP: Was: Now: $1,935.00 Choose Options
SEI New SEI / Mercruiser Bravo I Propshaft – Fits Bravo One Drives – Replaces OEM #41630T MSRP: Was: Now: $402.53 Choose Options
SEI New SEI / Mercruiser Bravo I, II & III Bellows Repair Kit – Fits 1982–Present – Complete Transom Seal Kit – Replaces OEM #30-803100T1 MSRP: Was: Now: $99.00 Choose Options
SEI New SEI / Mercruiser Alpha One Gen II Bellows Repair Kit (1992–Present) – Greasable Gimbal Bearing – Replaces OEM #30-803099T1 – Fits SE116 MSRP: Was: Now: $87.95 Choose Options
SEI New SEI / Mercruiser Alpha One Gen I Bellows Repair Kit (With Ridge) – Fits 1972–1991 R, MR, & Alpha 1 Drives – Replaces OEM #30-803097T1 MSRP: Was: Now: $87.95 Choose Options
SEI New SEI / Mercruiser 1984-1990 Alpha 1 4-CYL/V6/V8 Complete Counter-Rotation Sterndrive Assembly MSRP: Was: Now: $1,935.00 - $2,165.00 Choose Options
SEI New SEI / Mercruiser 1984-1990 Alpha 1 4-CYL/V6/V8 Complete Counter-Rotation (Short Yoke) Sterndrive Assembly MSRP: Was: Now: $2,165.00 Choose Options
SEI New SEI / MerCruiser Alpha One Upper Gear Set (1972–1990) – 3.0L 4-Cylinder – 1.94 / 2.40 Ratio – Replaces OEM 43-55778A3 This SEI Marine Upper Gear Set is a precision-engineered replacement for MerCruiser Type I, R, MR, and Alpha One sterndrives used with 3.0L 4-cylinder engines (1972–1990). Featuring a 1.94 / 2... MSRP: Was: Now: $241.31 Choose Options
SEI New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II Lower Unit Clutch Dog (1973–Present) – Replaces OEM #52-853594T & 52-853594 This SEI Marine Lower Unit Clutch Dog is a direct replacement for Mercruiser I, R, MR, Alpha I, and Alpha I Gen II sterndrives from 1973 to present. Manufactured to precise OEM standards, it ensures... MSRP: Was: Now: $112.03 Choose Options
SEI New SEI / Mercruiser 1972-1990 Alpha 1 Upper Sterndrive Assembly (9 9/16" Input Yoke) # 90-106-01A This listingis for a SEI / Mercruiser Alpha 1 1972-1990 Upper Unit With 9 9/16th New Style Input Yoke. Replaces OEM Number 9412A23, 9412A20, 9412A21, 9412A22. Replaces R, MR, Alpha... MSRP: Was: Now: $965.00 Choose Options
SEI New SEI / Mercruiser 1972-1990 Alpha 1 Upper Sterndrive Assembly (8 1/8" Short Yoke) SEI Mercruiser Alpha 1 1972-1990 Upper Unit With 8 1/8" Short Yoke. Replaces OEM Number 5523A65, 5523A67, 5523A66. Replaces R, MR, Alpha One lowers from 1972-1990, 13 Spline Driveshaft,... MSRP: Was: Now: $965.00 Choose Options
SEI New SEI / Mercruiser 1972-1990 Alpha 1 4 CYL, V6 and V8 Counter-Rotation Gearcase New SEI Mercruiser Alpha 1 1972-1990 Counter Rotation Lower Unit. Replaces OEM Number 8951A43. Will fit 4 cylinder, V6 and V8 engines. Will not work for Alpha 1 GEN II drives. Replaces R, MR, Alpha... MSRP: Was: Now: $1,175.00 Choose Options
SEI New SEI / Mercruiser Alpha 1 1972-1990 4 CYL, V6 & V8 Sterndrive Gearcase New SEI Mercruiser Alpha 1 1972-1990 Lower Unit. Replaces OEM Number 8951A43. Will fit 4 cylinder, V6 and V8 engines. Will not work for Alpha 1 GEN II drives. Replaces R, MR, Alpha One lowers from... MSRP: Was: Now: $1,065.99 Choose Options
SEI New SEI / MerCruiser MR & Alpha One Driveshaft (1982–1990) – Fits Serial #0D469858 & Below – Replaces OEM 45-42634 This SEI Marine Driveshaft is a precision-engineered replacement for MerCruiser MR and Alpha One sterndrives manufactured between 1982 and 1990 (serial numbers 0D469858 and below). Built to OEM... MSRP: Was: Now: $320.16 Choose Options
SEI New SEI / MerCruiser Alpha One Counter-Rotation Propshaft (1972–1990) – Replaces OEM 814606-1 This SEI Marine Counter-Rotation Propshaft is a precision-engineered replacement for MerCruiser Alpha One sterndrives manufactured between 1972 and 1990. Built to OEM specifications, this propshaft... MSRP: Was: Now: $330.97 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II Ratcheting Shift Spool (1972–Present) – Fits I, R, MR, Alpha I & Gen II Drives – Replaces OEM 818349T1 This SEI Marine Ratcheting Shift Spool is a direct replacement for MerCruiser I, R, MR, Alpha One, and Alpha One Gen II sterndrives manufactured from 1972 to present. Engineered to precise OEM... MSRP: Was: Now: $55.99 Choose Options
SEI New SEI / MerCruiser Alpha One Shift Shaft (1973–1990) – Fits I, R, MR, and Alpha I Drives – Replaces OEM 77481-1 This SEI Marine Shift Shaft is a precision-built replacement for MerCruiser I, R, MR, and Alpha One sterndrives manufactured between 1973 and 1990. Designed to OEM specifications, this component... MSRP: Was: Now: $30.88 Choose Options
SEI New SEI / MerCruiser Alpha One Complete U-Joint Assembly with Short Yoke (1972–1982) – Fits Inline 4 & Inline 6 Engines – Replaces OEM 58858A1 This SEI Marine Complete U-Joint Assembly with Short Yoke is designed for MerCruiser I, R, MR, and Alpha One sterndrives manufactured between 1972 and 1982. It fits applications using the 8-1/8"... MSRP: Was: Now: $305.95 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II Complete U-Joint Assembly (1972–Present) – Replaces OEM 814819A2 – Fits 9-9/16" Engine End Yoke This SEI Marine Complete U-Joint Assembly is a direct replacement for MerCruiser I, R, MR, Alpha One, and Alpha One Gen II sterndrives manufactured from 1972 to present. Designed for drives using the... MSRP: Was: Now: $321.46 Choose Options
SEI New SEI / MerCruiser Alpha One Short Input Yoke Shaft (1972–1990) – 8-1/8" – Fits Inline 4 & Inline 6 Engines – Replaces OEM 39385A1 This SEI Marine Short Input Yoke Shaft is a direct replacement for MerCruiser Alpha One sterndrives (1972–1990) and is designed to fit old-style inline 4-cylinder and inline 6-cylinder engines... MSRP: Was: Now: $108.60 Choose Options
SEI New SEI / MerCruiser Alpha One Heavy Duty U-Joint (1970–1997) – Greasable – Replaces OEM 3850812 / 75832T1 – Also Fits OMC Cobra & Volvo Penta SX This SEI Marine Heavy Duty U-Joint is designed for MerCruiser Alpha One sterndrives (1972–1990) and compatible with select OMC Cobra (1986–1997) and Volvo Penta SX (Joint Venture... MSRP: Was: Now: $36.70 Add to Cart
SEI New SEI / MerCruiser Alpha One H-Yoke (1972–1990) – Replaces OEM 0912213 – Serial Numbers OK999999 and Below This SEI Marine H-Yoke is a direct aftermarket replacement for MerCruiser I, R, MR, Alpha One, and Alpha One Gen II Sterndrives produced from 1972 to 1990. Designed for applications with serial... MSRP: Was: Now: $47.95 Choose Options
SEI New SEI / MerCruiser Alpha One Short Yoke Shaft (1972–1997) – Replaces OEM 46020 1 – Serial Numbers OK999999 and Below This SEI Marine Short Yoke Shaft is a direct aftermarket replacement for MerCruiser I, R, MR, Alpha One, and Alpha One Gen II Sterndrives manufactured between 1972 and 1997. Designed for applications... MSRP: Was: Now: $74.13 Choose Options
SEI New SEI / MerCruiser Alpha One Engine End Yoke Shaft (1972–1990) – 9-9/16" – Replaces OEM 0912212 / 814819A3 This SEI Marine Engine End Yoke Shaft is a direct aftermarket replacement for MerCruiser Alpha One sterndrives manufactured from 1972 to 1990. Measuring 9-9/16" in length, this yoke fits all... MSRP: Was: Now: $101.81 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II 6-Jaw Propshaft (1972–Present) – Standard Rotation – Replaces OEM 44-850308 / 44-824110 This SEI Marine 6-Jaw Propshaft is a direct aftermarket replacement for MerCruiser Alpha One and Alpha One Gen II Sterndrives from 1972 to present. Engineered for standard rotation applications, it... MSRP: Was: Now: $330.97 Choose Options
SEI New SEI / MerCruiser Alpha One Driveshaft (1972–1990) – Replaces OEM 45-55796 – Not for Gen II Drives This SEI Marine Driveshaft is a direct aftermarket replacement for MerCruiser I, R, MR, and Alpha One Sterndrives manufactured from 1972 to 1990. It is designed to meet or exceed OEM performance... MSRP: Was: Now: $80.07 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II Stainless Trim Pump Assembly (1986–Present) – Replaces OEM 865380A25 This SEI Marine Trim Pump Assembly is a direct aftermarket replacement for MerCruiser Alpha One and Alpha One Gen II Sterndrives manufactured from 1986 to present. Designed for optimal performance... MSRP: Was: Now: $440.00 Choose Options
SEI New SEI / MerCruiser Alpha One & Alpha One Gen II Trim Pump Assembly (1986–Present) – Replaces OEM 865380A25 This SEI Marine Trim Pump Assembly is a direct aftermarket replacement for MerCruiser Alpha One and Alpha One Gen II Sterndrives manufactured from 1986 to present. Designed for optimal performance... MSRP: Was: Now: $330.00 Choose Options
SEI New SEI / Mercruiser Alpha 1 Gen II 4-CYL/V6/V8 Complete Sterndrive Assembly (1991-2003) Upgrade your boat’s performance with this brand-new SEI / Mercruiser Alpha One Gen II Complete Sterndrive Assembly, designed to replace most MerCruiser sterndrives manufactured between 1991 and... MSRP: Was: Now: $1,935.00 Choose Options
SEI New SEI / Mercruiser 1972-1990 4-CYL/V6/V8 R/MR/ & Alpha 1 Complete Sterndrive Assembly Replaces most Mercruiser Sterndrives 228 HP and up from 1974-1990. 3 Year fault free warranty carried by manufacturer (click HERE for details). Comes with a 9-9/16 new style input yoke. If your... MSRP: Was: Now: $1,935.00 Choose Options
SEI New SEI / Mercruiser 1972-1982 4-CYL/V6/V8 R/MR/ & Alpha 1 (Short Yoke) Complete Sterndrive Assembly New SEI Mercruiser Alpha 1 Gen 1 (1967-1982) Complete Standard Rotation (Short Yoke) Sterndrive. Ships in two boxes. Comes with a 8-1/8 old style input yoke. Does not include Complete Install Kit or... MSRP: Was: Now: $1,935.00 Choose Options
SEI New SEI / Mercruiser Bravo I Propshaft – Fits Bravo One Drives – Replaces OEM #41630T This SEI Marine Propshaft is a direct replacement for Mercruiser Bravo I sterndrive models. It replaces OEM #41630T and is engineered to match original Bravo I specifications for spline fitment,... MSRP: Was: Now: $402.53 Choose Options
SEI New SEI / Mercruiser Bravo I, II & III Bellows Repair Kit – Fits 1982–Present – Complete Transom Seal Kit – Replaces OEM #30-803100T1 This SEI Marine Bellows Repair Kit is a complete transom seal kit for Mercruiser Bravo I, Bravo II, and Bravo III sterndrives (1982–Present). It replaces OEM part number 30-803100T1 and... MSRP: Was: Now: $99.00 Choose Options
SEI New SEI / Mercruiser Alpha One Gen II Bellows Repair Kit (1992–Present) – Greasable Gimbal Bearing – Replaces OEM #30-803099T1 – Fits SE116 This SEI Marine Transom Bellows Repair Kit is designed for Mercruiser Alpha One Gen II sterndrives (1992–Present) and replaces OEM part number 30-803099T1. This version includes a greasable... MSRP: Was: Now: $87.95 Choose Options
SEI New SEI / Mercruiser Alpha One Gen I Bellows Repair Kit (With Ridge) – Fits 1972–1991 R, MR, & Alpha 1 Drives – Replaces OEM #30-803097T1 This SEI Marine Bellows Repair Kit (With Ridge) is designed for Mercruiser Alpha One Gen I sterndrives (1972–1991), including R and MR models equipped with exhaust bellows. The kit replaces OEM... MSRP: Was: Now: $87.95 Choose Options
SEI New SEI / Mercruiser 1984-1990 Alpha 1 4-CYL/V6/V8 Complete Counter-Rotation Sterndrive Assembly New SEI Mercruiser Alpha 1 Gen 1 (1984-1990) Complete Counter Rotation Sterndrive. Ships in two boxes. Comes with a 9-9/16 new style input yoke. Does not include Complete Install Kit or Anode Kit... MSRP: Was: Now: $1,935.00 - $2,165.00 Choose Options
SEI New SEI / Mercruiser 1984-1990 Alpha 1 4-CYL/V6/V8 Complete Counter-Rotation (Short Yoke) Sterndrive Assembly New SEI Mercruiser Alpha 1 Gen 1 (1984-1990) Complete Counter Rotation (Short Yoke) Sterndrive. Ships in two boxes. Comes with a 8-1/8 input yoke. Does not include Complete Install Kit or Anode Kit... MSRP: Was: Now: $2,165.00 Choose Options
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