Categories - OBParts

SEI

New SEI / Mercruiser Alpha I (1972–1990) Lower Housing Seal Kit – Replaces OEM #26-33144A2

MSRP:

Was:

Now: $57.71

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SEI

New SEI / MerCruiser Alpha One Upper Seal Kit (1972–1990) – Replaces OEM 26-32511A1

MSRP:

Was:

Now: $35.85

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SEI

New SEI / MerCruiser Alpha One Counter-Rotation Bearing Carrier (1972–1990) – Replaces OEM 14587A5

MSRP:

Was:

Now: $156.30

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SEI

New SEI / MerCruiser Alpha One Bearing Carrier (1972–1990) – Replaces OEM 818763A11 / 43567T1

MSRP:

Was:

Now: $84.74

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SEI

New SEI / MerCruiser Alpha One Lower Gear Set (1972–1990) – 1.62:1 Ratio – Counter Rotation – Replaces OEM 812975A5 / 824700A1

MSRP:

Was:

Now: $550.95

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SEI

New SEI / MerCruiser Alpha One & Alpha One Gen II Lower Gear Set (1972–1997) – 1.62:1 Ratio – 3.265" O.D. Case – Replaces OEM 828072A3 / 828073A1 / 43-878087A4

MSRP:

Was:

Now: $399.95

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SEI

New SEI / MerCruiser Alpha One & Alpha One Gen II Lower Gear Set (1972–1997) – 1.62:1 Ratio – 3.500" O.D. Case – Replaces OEM 43-878087A4 / 43-828073A1

MSRP:

Was:

Now: $399.95

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SEI

New SEI / MerCruiser Alpha One Upper Gear Set (1972–1990) – 5.7L V8 – 1.47 / 1.50 Ratio – Replaces OEM 43-18410A4

MSRP:

Was:

Now: $314.99

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SEI

New SEI / Mercruiser Alpha 1 5.0L V8 Heavy Duty Upper Gear Set (1972–1990) – 1.62/1.65:1 Ratio – SEI Designed – Fits I, R, MR, Alpha I Drives

MSRP:

Was:

Now: $314.99

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SEI

New SEI / Mercruiser Alpha 1 5.0L V8 Upper Gear Set (1972–1990) – 1.62:1 Ratio – Replaces OEM #43-45814A5

MSRP:

Was:

Now: $275.70

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SEI

New SEI / MerCruiser Alpha One Upper Gear Set (1972–1990) – 4.3L V6 – 1.81 Ratio – Replaces OEM 43-75325A3

MSRP:

Was:

Now: $218.98

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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: $206.95

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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

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Upper Sterndrive Assembly (9 9/16" Input Yoke) # 90-106-01A

MSRP:

Was:

Now: $965.00

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Upper Sterndrive Assembly (8 1/8" Short Yoke)

MSRP:

Was:

Now: $965.00

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 4 CYL, V6 and V8 Counter-Rotation Gearcase

MSRP:

Was:

Now: $1,175.00

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 4 CYL, V6 & V8 Sterndrive Gearcase

MSRP:

Was:

Now: $1,065.99

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WSM

New WSM / Yamaha 1984-2009 V6 90° 150/175/200 HP Small Taper Outboard Crankshaft OEM # 6G5-11411-00

MSRP:

Was:

Now: $1,068.69

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WSM

Remanufactured WSM / Yamaha 1990-1993 150-225 HP V6 90° Medium Taper Outboard Crankshaft OEM # 6R3-11411-00

MSRP:

Was:

Now: $944.00

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WSM

New WSM / Yamaha 1984-1996 115 & 130 HP V4 90° Small Taper Outboard Crankshaft OEM # 6E5-11411-00

MSRP:

Was:

Now: $661.39

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SEI

New SEI / MerCruiser MR & Alpha One Driveshaft (1982–1990) – Fits Serial #0D469858 & Below – Replaces OEM 45-42634

MSRP:

Was:

Now: $297.35

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SEI

New SEI / MerCruiser Alpha One Counter-Rotation Propshaft (1972–1990) – Replaces OEM 814606-1

MSRP:

Was:

Now: $305.95

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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

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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: $29.95

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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

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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: $299.95

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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: $96.93

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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

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SEI

New SEI / MerCruiser Alpha One H-Yoke (1972–1990) – Replaces OEM 0912213 – Serial Numbers OK999999 and Below

MSRP:

Was:

Now: $47.95

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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

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SEI

New SEI / MerCruiser Alpha One Engine End Yoke Shaft (1972–1990) – 9-9/16" – Replaces OEM 0912212 / 814819A3

MSRP:

Was:

Now: $95.95

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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: $300.95

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SEI

New SEI / MerCruiser Alpha One Driveshaft (1972–1990) – Replaces OEM 45-55796 – Not for Gen II Drives

MSRP:

Was:

Now: $75.95

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SEI

New SEI / MerCruiser Alpha One & Alpha One Gen II Stainless Trim Pump Assembly (1986–Present) – Replaces OEM 865380A25

MSRP:

Was:

Now: $400.00

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SEI

New SEI / MerCruiser Alpha One & Alpha One Gen II Trim Pump Assembly (1986–Present) – Replaces OEM 865380A25

MSRP:

Was:

Now: $300.00

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SEI

New SEI / Yamaha V6 200–225 HP 4-Stroke Gear Set (2002–Present) – Counter Rotation – 2:1 Ratio – Replaces OEM 6J9-45551-00-00

MSRP:

Was:

Now: $677.05

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SEI

New SEI / Yamaha V6 200–225 HP 4-Stroke Gear Set (2002–Present) – Standard Rotation – 2:1 Ratio – Replaces OEM 69J-45551-00-00

MSRP:

Was:

Now: $648.07

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SEI

New SEI / Yamaha V6 225–250 HP 3.1L / 3.2L 2-Stroke Gear Set (1990–Present) – Standard Rotation – 1.81:1 Ratio – Replaces OEM 61A-45551-03-00

MSRP:

Was:

Now: $601.11

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SEI

New SEI / Yamaha 150 HP 4-Stroke Gear Set (2004–Present) – Counter Rotation – 2:1 Ratio – Replaces OEM 63P-45551-00-00

MSRP:

Was:

Now: $774.40

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ARCO

New Arco / Mercury & Mariner 135-200 HP V6 Outboard Starter OEM # 50-44414

MSRP:

Was:

Now: $195.00

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ARCO

New Arco / Mercury & Mariner 100-125 HP Inline 4-CYL Outboard Starter #50-66015-T

MSRP:

Was:

Now: $215.95

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ARCO

New Arco / Mercury & Mariner 90-175 HP Inline Outboard Starter # 50-57465A1

MSRP:

Was:

Now: $215.95

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ARCO

New Arco / Mercury & Mariner 50-90 HP Outboard Starter # 50-44369A1

MSRP:

Was:

Now: $194.95

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ARCO

New Arco / Mercury 50-60 HP 3-CYL Outboard Starter # 898265012

MSRP:

Was:

Now: $182.95

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ARCO

New Arco / Mercury & Mariner 40-50 HP Outboard Starter # 50-73521

MSRP:

Was:

Now: $195.99

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ARCO

New Arco / Mercury 2001 & Up 40/50/60 HP 4-CYL 4-Stroke Outboard Starter # 50-859377T

MSRP:

Was:

Now: $232.95

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ARCO

New Arco / Mercury 1997 & Up 40-50 HP 4-Stroke Outboard Starter # 50-834749

MSRP:

Was:

Now: $195.00

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ARCO

New Arco / Mercury 35-50 HP Outboard Starter # 50-30829

MSRP:

Was:

Now: $181.95

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SEI

New SEI / Mercruiser Alpha I (1972–1990) Lower Housing Seal Kit – Replaces OEM #26-33144A2

This SEI Marine Lower Housing Seal Kit is a direct replacement for Mercruiser Alpha I sterndrives (1972–1990). The kit includes all essential seals and O-rings required for servicing or rebuilding the lower housing, ensuring leak-free performance...

MSRP:

Was:

Now: $57.71

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SEI

New SEI / MerCruiser Alpha One Upper Seal Kit (1972–1990) – Replaces OEM 26-32511A1

This SEI Marine Upper Seal Kit is a direct-fit replacement for MerCruiser Alpha One (Gen I) sterndrives manufactured between 1972 and 1990. It replaces OEM 26-32511A1 and includes all necessary seals and gaskets to restore factory-grade oil retention and...

MSRP:

Was:

Now: $35.85

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SEI

New SEI / MerCruiser Alpha One Counter-Rotation Bearing Carrier (1972–1990) – Replaces OEM 14587A5

This SEI Marine Counter-Rotation Bearing Carrier is designed as a direct replacement for MerCruiser Alpha One sterndrives manufactured between 1972 and 1990. It replaces OEM 14587A5, providing precise fitment and reliable performance for counter-rotating...

MSRP:

Was:

Now: $156.30

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SEI

New SEI / MerCruiser Alpha One Bearing Carrier (1972–1990) – Replaces OEM 818763A11 / 43567T1

This SEI Marine Bearing Carrier is a direct replacement for MerCruiser Alpha One sterndrives manufactured from 1972 to 1990. It replaces OEM 818763A11 and 43567T1, offering precision fit, alignment, and long-term durability for lower unit rebuilds and...

MSRP:

Was:

Now: $84.74

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SEI

New SEI / MerCruiser Alpha One Lower Gear Set (1972–1990) – 1.62:1 Ratio – Counter Rotation – Replaces OEM 812975A5 / 824700A1

This SEI Marine Counter-Rotation Lower Gear Set is a precision-engineered replacement for MerCruiser Alpha One sterndrives manufactured from 1972 to 1990. Featuring a 1.62:1 gear ratio, this set provides smooth reverse-rotation operation and consistent...

MSRP:

Was:

Now: $550.95

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SEI

New SEI / MerCruiser Alpha One & Alpha One Gen II Lower Gear Set (1972–1997) – 1.62:1 Ratio – 3.265" O.D. Case – Replaces OEM 828072A3 / 828073A1 / 43-878087A4

This SEI Marine Lower Gear Set is a precision-built replacement for MerCruiser Alpha One and Alpha One Gen II sterndrives with serial numbers 0F680000 and up. Featuring a 1.62:1 gear ratio and 3.265" O.D. forward gear bearing, this set ensures smooth...

MSRP:

Was:

Now: $399.95

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SEI

New SEI / MerCruiser Alpha One & Alpha One Gen II Lower Gear Set (1972–1997) – 1.62:1 Ratio – 3.500" O.D. Case – Replaces OEM 43-878087A4 / 43-828073A1

This SEI Marine Lower Gear Set is designed for MerCruiser Alpha One and Alpha One Gen II sterndrives with serial numbers 0F679999 and below. Featuring a 1.62:1 gear ratio and a 3.500" O.D. forward gear bearing, this set provides smooth power transfer,...

MSRP:

Was:

Now: $399.95

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SEI

New SEI / MerCruiser Alpha One Upper Gear Set (1972–1990) – 5.7L V8 – 1.47 / 1.50 Ratio – Replaces OEM 43-18410A4

This SEI Marine Upper Gear Set is engineered as a direct replacement for MerCruiser Type I, R, MR, and Alpha One sterndrives from 1972–1990, designed specifically for 5.7L V8 engines. Featuring a 1.47 / 1.50 gear ratio, this precision-machined gear...

MSRP:

Was:

Now: $314.99

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SEI

New SEI / Mercruiser Alpha 1 5.0L V8 Heavy Duty Upper Gear Set (1972–1990) – 1.62/1.65:1 Ratio – SEI Designed – Fits I, R, MR, Alpha I Drives

This SEI Marine Heavy Duty Upper Gear Set is designed and manufactured by SEI specifically for Mercruiser 5.0L V8 sterndrives with 1.62:1 or 1.65:1 gear ratios. It fits Type I, R, MR, and Alpha I drives produced from 1972 through 1990 (serial numbers...

MSRP:

Was:

Now: $314.99

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SEI

New SEI / Mercruiser Alpha 1 5.0L V8 Upper Gear Set (1972–1990) – 1.62:1 Ratio – Replaces OEM #43-45814A5

This SEI Marine Upper Gear Set is a direct replacement for Mercruiser 5.0L V8 sterndrives featuring a 1.62:1 gear ratio. It fits Type I, R, MR, and Alpha I drives from 1973 through 1990, including early models prior to the Alpha Gen II design...

MSRP:

Was:

Now: $275.70

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SEI

New SEI / MerCruiser Alpha One Upper Gear Set (1972–1990) – 4.3L V6 – 1.81 Ratio – Replaces OEM 43-75325A3

This SEI Marine Upper Gear Set is a direct replacement for MerCruiser Type I, R, MR, and Alpha One sterndrives from 1972 to 1990, designed for 4.3L V6 engines. Featuring a 1.81 gear ratio, this set provides smooth, reliable power transfer and efficient...

MSRP:

Was:

Now: $218.98

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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 / 2.40 gear ratio, this set ensures smooth, quiet operation...

MSRP:

Was:

Now: $206.95

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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 smooth and reliable gear engagement while reducing wear...

MSRP:

Was:

Now: $112.03

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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 One Uppers from 1972-1990, Up to 300 HP and is offered...

MSRP:

Was:

Now: $965.00

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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, Up to 300 HP and is offered with the following ratios:...

MSRP:

Was:

Now: $965.00

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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 One lowers from 1972-1990. 13 Spline Driveshaft. Up to...

MSRP:

Was:

Now: $1,175.00

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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 1972-1990. 13 Spline Driveshaft. Tooth count is 13-21Up...

MSRP:

Was:

Now: $1,065.99

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WSM

New WSM / Yamaha 1984-2009 V6 90° 150/175/200 HP Small Taper Outboard Crankshaft OEM # 6G5-11411-00

New WSM / Yamaha 1984-2009 V6 90° 150/175/200 HP Small Taper Outboard Crankshaft. OEM # 6G5-11411-00. SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or International Shipping will be calculated after checkout. You will...

MSRP:

Was:

Now: $1,068.69

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WSM

Remanufactured WSM / Yamaha 1990-1993 150-225 HP V6 90° Medium Taper Outboard Crankshaft OEM # 6R3-11411-00

Remanufactured Yamaha V6 90 Degree 150-225 HP Medium Taper Crankshaft. Replaces OEM numbers 6R3-11411-00, 6R3-11411-09, 6R3-11411-09-00, 6R3-11411-00-00. Will fit the following...

MSRP:

Was:

Now: $944.00

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WSM

New WSM / Yamaha 1984-1996 115 & 130 HP V4 90° Small Taper Outboard Crankshaft OEM # 6E5-11411-00

New WSM Yamaha V4 90° 115 & 140 HP Small Taper Crankshaft. Replaces OEM number 6E5-11411-01-00. SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or International Shipping will be calculated after checkout. You will receive...

MSRP:

Was:

Now: $661.39

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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 specifications, this driveshaft ensures smooth torque...

MSRP:

Was:

Now: $297.35

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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 ensures smooth operation, proper alignment, and...

MSRP:

Was:

Now: $305.95

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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 standards, this ratcheting-style shift spool provides smooth,...

MSRP:

Was:

Now: $55.99

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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 ensures proper shift linkage alignment and smooth, reliable...

MSRP:

Was:

Now: $29.95

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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" engine end yoke, including inline 4-cylinder and inline...

MSRP:

Was:

Now: $305.95

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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 9-9/16" engine end yoke, this precision-built assembly...

MSRP:

Was:

Now: $299.95

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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. Measuring 8-1/8", this precision-machined input yoke...

MSRP:

Was:

Now: $96.93

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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 1986–1997) applications. Built to OEM specifications for...

MSRP:

Was:

Now: $36.70

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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 numbers OK999999 and below, this heavy-duty yoke provides...

MSRP:

Was:

Now: $47.95

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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 with serial numbers OK999999 and below, this...

MSRP:

Was:

Now: $74.13

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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 V6 and V8 engines, as well as inline engines newer than...

MSRP:

Was:

Now: $95.95

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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 replaces OEM 44-850308 and 44-824110 and ensures precise...

MSRP:

Was:

Now: $300.95

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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 standards, providing reliable power transfer and proper...

MSRP:

Was:

Now: $75.95

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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 and reliability, this complete trim pump assembly...

MSRP:

Was:

Now: $400.00

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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 and reliability, this complete trim pump assembly...

MSRP:

Was:

Now: $300.00

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SEI

New SEI / Yamaha V6 200–225 HP 4-Stroke Gear Set (2002–Present) – Counter Rotation – 2:1 Ratio – Replaces OEM 6J9-45551-00-00

This SEI Marine Complete Gear Set is a direct aftermarket replacement for Yamaha V6 4-Stroke 200–225 HP outboards manufactured from 2002 to present. Designed for counter-rotation 76-degree V6 engines, this gear set features a 2:1 gear ratio and...

MSRP:

Was:

Now: $677.05

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SEI

New SEI / Yamaha V6 200–225 HP 4-Stroke Gear Set (2002–Present) – Standard Rotation – 2:1 Ratio – Replaces OEM 69J-45551-00-00

This SEI Marine Complete Gear Set is a direct aftermarket replacement for Yamaha V6 4-Stroke 200–225 HP outboards manufactured from 2002 to present. Designed for standard-rotation lower units, it features a 2:1 gear ratio and 15/30 tooth count,...

MSRP:

Was:

Now: $648.07

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SEI

New SEI / Yamaha V6 225–250 HP 3.1L / 3.2L 2-Stroke Gear Set (1990–Present) – Standard Rotation – 1.81:1 Ratio – Replaces OEM 61A-45551-03-00

This SEI Marine Complete Gear Set is a direct aftermarket replacement for Yamaha V6 3.1L / 3.2L 2-Stroke outboards rated 225–250 HP from 1990 to present. Designed for standard-rotation 76-degree V6 engines, it features a 1.81:1 gear ratio and 16/29...

MSRP:

Was:

Now: $601.11

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SEI

New SEI / Yamaha 150 HP 4-Stroke Gear Set (2004–Present) – Counter Rotation – 2:1 Ratio – Replaces OEM 63P-45551-00-00

This SEI Marine Complete Gear Set is a direct aftermarket replacement for Yamaha 150 HP 4-Stroke outboards manufactured from 2004 to present. Designed for counter-rotation lower units, this precision-engineered gear set features a 2:1 gear ratio and...

MSRP:

Was:

Now: $774.40

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ARCO

New Arco / Mercury & Mariner 135-200 HP V6 Outboard Starter OEM # 50-44414

New Arco Mercury/Mariner 135-200 HP V6 Outboard Starter, OEM Part #: 50-44414, MERCURY 50-44414MERCURY 50-44415MERCURY 50-77141MERCURY 50-79472MERCURY 50-79472-1MERCURY 50-79472T2MERCURY 50-884238TMERCURY 50-893890MERCURY...

MSRP:

Was:

Now: $195.00

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ARCO

New Arco / Mercury & Mariner 100-125 HP Inline 4-CYL Outboard Starter #50-66015-T

New Arco Mercury/Mariner 100-125 HP Inline 4-CYL Outboard Starter, OEM Part #: 50-66015-T, MERCURY 50-66015-TMERCURY 50-66015-1MERCURY 50-66015-3MERCURY 50-893892T SIERRA 18-5610 8-Tooth Drive Gear. Fits...

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Was:

Now: $215.95

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ARCO

New Arco / Mercury & Mariner 90-175 HP Inline Outboard Starter # 50-57465A1

New Arco Mercury/Mariner 90-175 HP Inline Outboard Starter, OEM Part # 50-57465A1, MERCURY 50-57465A1MERCURY 50-57867MERCURY 50-72467MERCURY 50-898265010 SIERRA 18-5636 SIERRA 18-5649 10-Tooth Drive Gear. Fits...

MSRP:

Was:

Now: $215.95

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ARCO

New Arco / Mercury & Mariner 50-90 HP Outboard Starter # 50-44369A1

New Arco Mercury/Mariner 50-90 HP Outboard Starter, OEM Part # 50-44369A1, Mercury 50-44369A1Mercury 50-60315Mercury 50-65436Mercury 50-66015Mercury 50-66015-2Mercury 50-66015-TMercury 50-893891T SIERRA 18-5604 SIERRA...

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Was:

Now: $194.95

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ARCO

New Arco / Mercury 50-60 HP 3-CYL Outboard Starter # 898265012

New Arco Mercury 50-60 HP 3-Cylinder Outboard Starter, OEM Part # 898265012, MERCURY 898265012MERCURY 50-44369MERCURY 50-44369A150MERCURY 50-898265012 SIERRA 18-5606 10-Tooth Drive Gear. Fits Mercury 50-60 HP...

MSRP:

Was:

Now: $182.95

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ARCO

New Arco / Mercury & Mariner 40-50 HP Outboard Starter # 50-73521

New Arco Mercury/Mariner 40-50 HP Outboard Starter, OEM Part #: 50-73521, MERCURY 50-73521MERCURY 50-73521TMERCURY 50-898265005 SIERRA 18-5605 10-Tooth Drive Gear. CW Rotation. Fits Mercury/Mariner 40-50 HP...

MSRP:

Was:

Now: $195.99

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ARCO

New Arco / Mercury 2001 & Up 40/50/60 HP 4-CYL 4-Stroke Outboard Starter # 50-859377T

New Arco Mercury 2001 and Up 40/50/60 HP 4-Cylinder 4-Stroke Outboard Starter, OEM Part #: 50-859377T, Mercury 50-859377TMercury 50-884044TMercury 50-888161TMercury 50-893888T SIERRA 18-6435 9-Tooth Drive Gear. Fits...

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Was:

Now: $232.95

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ARCO

New Arco / Mercury 1997 & Up 40-50 HP 4-Stroke Outboard Starter # 50-834749

New Arco Mercury 1997 and Up 40-50 HP Outboard Starter, OEM Part #: 50-834749, Mercury 50-834749Mercury 50-859171TMercury 50-898265001 SIERRA 18-6436 9-Tooth Metric Drive Gear Fits Mercury 1997 and Up 40-50 HP...

MSRP:

Was:

Now: $195.00

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ARCO

New Arco / Mercury 35-50 HP Outboard Starter # 50-30829

New Arco Mercury 35-50 HP Outboard Starter, OEM Part #: 50-30829, Mercury 50-30829Mercury 50-37345A1Mercury 50-38890A1Mercury 50-55601A2Mercury 50-898265006 SIERRA 18-5601 SIERRA 18-5641 9-Tooth Drive...

MSRP:

Was:

Now: $181.95

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