Categories - ObParts

SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1972-1997 Lower Gear Set Serial # OF680000 and Up

MSRP:

Was:

Now: $375.99

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SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1972-1997 Lower Gear Set Serial # OF679999 and Below

MSRP:

Was:

Now: $375.99

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 5.7L V8 1.47/1.50 Ratio Gear Set

MSRP:

Was:

Now: $314.99

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SEI

New SEI Mercruiser Alpha 1 1972-1990 5.0L V8 1.62 Ratio Heavy Duty Upper Gear Set

MSRP:

Was:

Now: $314.99

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 5.0L V8 1.62 Ratio Upper Gear Set

MSRP:

Was:

Now: $223.70

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 4.3L V6 1.81 Upper Gear Set OEM # 43-75325A3

MSRP:

Was:

Now: $218.98

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 3.0L 4 CYL 1.94 / 2.40 Ratio Upper Gear Set

MSRP:

Was:

Now: $206.95

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SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1973 - Present Lower Unit Clutch Dog

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: $875.00

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SEI

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

MSRP:

Was:

Now: $875.00

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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: $975.00

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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 1972-1990 MR / Alpha 1 Sterndrive Driveshaft OEM # 45-42634

MSRP:

Was:

Now: $297.35

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Counter-Rotation Lower Unit Propshaft OEM # 814606 1

MSRP:

Was:

Now: $289.31

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SEI

New SEI / Mercruiser 1972-Present Alpha 1 & Alpha 1 Gen II Ratcheting Shift Spool

MSRP:

Was:

Now: $55.99

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Shift Shaft

MSRP:

Was:

Now: $26.99

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SEI

New SEI / Mercruiser 1972-1982 Alpha 1 Short Yoke U-Joint Assembly OEM # 58858A1

MSRP:

Was:

Now: $287.99

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SEI

New SEI / Mercruiser 1972-Present Alpha 1 & Alpha 1 Gen II Complete U-Joint Assembly

MSRP:

Was:

Now: $287.99

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Short Input Yoke Shaft 8 1/8"

MSRP:

Was:

Now: $94.93

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SEI

New Sterndrive Engineering Mercruiser 1972-1990 Alpha 1 Heavy Duty U-Joint

MSRP:

Was:

Now: $36.70

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 H-Yoke

MSRP:

Was:

Now: $43.72

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Short Yoke Shaft

MSRP:

Was:

Now: $64.80

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Engine End Yoke Shaft 9 9/16"

MSRP:

Was:

Now: $88.99

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SEI

New SEI / Mercruiser 1972-Present Alpha 1 & Alpha 1 Gen II 6 Jaw Propshaft

MSRP:

Was:

Now: $289.31

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 Driveshaft

MSRP:

Was:

Now: $69.99

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SEI

New SEI / Mercruiser 1986 & Up Alpha 1 & Alpha 1 Gen II Stainless Steel Trim Pump Assembly

MSRP:

Was:

Now: $400.00

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SEI

New SEI / Mercruiser 1986 & Up Alpha 1 & Alpha 1 Gen II Trim Pump Assembly

MSRP:

Was:

Now: $300.00

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SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1972-1997 Lower Gear Set Serial # OF680000 and Up

New SEI Mercruiser Alpha 1 & Alpha 1 Gen II 1972-1997 Lower Gear Set Serial # OF680000 and Up. Replaces OEM number 43-878087A 4 + 43-828073A1. 828072A3 + 828073A1. Includes 3.500" O.D. Forward Gear Bearing. Three year fault free warranty. SHIPPING:...

MSRP:

Was:

Now: $375.99

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SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1972-1997 Lower Gear Set Serial # OF679999 and Below

New SEI Mercruiser Alpha 1 & Alpha 1 Gen II 1972-1997 Lower Gear Set. Replaces OEM number 43-878087A 4 + 43-828073A1. Fits Alpha I and Alpha I Gen II Serial Number OF679999 and below. Includes 3.500" O.D. Forward Gear Bearing. Three year fault free...

MSRP:

Was:

Now: $375.99

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 5.7L V8 1.47/1.50 Ratio Gear Set

New SEI Mercruiser Alpha 1 1972-1990 5.7L V8 1.47/1.50 Ratio Gear Set. Replaces OEM number 43-18410A4. Fits Type I, R, MR, Alpha I drives (Also replaces Gen II Serial #s 0L00039 and below). SHIPPING: Additional shipping fees to Alaska, Hawaii, US...

MSRP:

Was:

Now: $314.99

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SEI

New SEI Mercruiser Alpha 1 1972-1990 5.0L V8 1.62 Ratio Heavy Duty Upper Gear Set

New SEI Mercruiser Alpha 1 1972-1990 5.0L V8 1.62 / 1.65:1 ratio Heavy Duty Upper Gear Set. SEi Designed and Manufactured. Fits Type I, R, MR, Alpha I drives. Three year fault free warranty. SHIPPING: Additional shipping fees to Alaska, Hawaii, US...

MSRP:

Was:

Now: $314.99

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 5.0L V8 1.62 Ratio Upper Gear Set

New SEI Mercruiser Alpha 1 1972-1990 5.0L V8 1.62 Ratio Upper Gear Set. Replaces OEM number 43-45814A5. Fits Type I, R, MR, Alpha I drives. Three year fault free warranty. SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or...

MSRP:

Was:

Now: $223.70

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 4.3L V6 1.81 Upper Gear Set OEM # 43-75325A3

New SEI Mercruiser Alpha 1 1972-1990 4.3L V6 1.81 Ratio Upper Gear Set. Replaces OEM number 43-75325A3. Fits Type I, R, MR, Alpha I drives. Three year fault free warranty. SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or...

MSRP:

Was:

Now: $218.98

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 3.0L 4 CYL 1.94 / 2.40 Ratio Upper Gear Set

New SEI Mercruiser Alpha 1 1972-1990 3.0L 4 CYL 1.94 / 2.40 Ratio Upper Gear Set. Replaces OEM number 43-55778A3. Fits Type I, R, MR, Alpha I drives. Three year fault free warranty. SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories,...

MSRP:

Was:

Now: $206.95

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SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1973 - Present Lower Unit Clutch Dog

New SEI Mercruiser Alpha 1 & Alpha 1 Gen II 1973 - Present Lower Unit Clutch Dog. Replaces OE#'s 52-853594T and 52-853594. Three year fault free warranty. SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or International...

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. Available with the following ratios: 3.0L 4 CYL 1.94 Ratio, 4.3L V6 1.81 Ratio, 5.0L V8 1.62 Ratio and 5.7L V8 1.47 Ratio...

MSRP:

Was:

Now: $875.00

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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. Available with the following ratios: 3.0L 4 CYL 1.94 Ratio, 4.3L V6 1.81 Ratio and 5.0L V8 1.62 Ratio. Will not work for Alpha 1 GEN II drives. Replaces R,...

MSRP:

Was:

Now: $875.00

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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: $975.00

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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 receive...

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 engines: Yamaha 150 1990 Yamaha 150 1991 Yamaha...

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 1972-1990 MR / Alpha 1 Sterndrive Driveshaft OEM # 45-42634

New SEI Mercruiser 1972-1990 MR / Alpha 1 Driveshaft. Replaces OEM Number 45-42634. Fits Mercruiser MR and Alpha I drives 1982 to 1990 (Serial #0D469858 and below). Driveshaft for SE106. Three year fault free warranty (click HERE for details). SHIPPING:...

MSRP:

Was:

Now: $297.35

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Counter-Rotation Lower Unit Propshaft OEM # 814606 1

New SEI Mercruiser 1972-1990 Alpha 1 Counter Rotation Propshaft. Replaces OEM Number 814606 1. Three year fault free warranty (click HERE for details). SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or International Shipping will...

MSRP:

Was:

Now: $289.31

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SEI

New SEI / Mercruiser 1972-Present Alpha 1 & Alpha 1 Gen II Ratcheting Shift Spool

New SEI Mercruiser 1972-Present Alpha 1 & Alpha 1 Gen II Ratcheting Shift Spool. Replaces OEM Number 818349T1. Fits Mercruiser I, R, MR, Alpha I and Gen II drives, 1972 - Present. Three year fault free warranty (click HERE for details). SHIPPING:...

MSRP:

Was:

Now: $55.99

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Shift Shaft

New SEI Mercruiser 1972-1990 Alpha 1 Shift Shaft. Replaces OEM Number 77481 1. Three year fault free warranty (click HERE for details). Fits Mercruiser I, R, MR, and Alpha I drives, 1973 - 1990 SHIPPING: Additional shipping fees to Alaska, Hawaii, US...

MSRP:

Was:

Now: $26.99

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SEI

New SEI / Mercruiser 1972-1982 Alpha 1 Short Yoke U-Joint Assembly OEM # 58858A1

New SEI Mercruiser 1972-1982 Alpha 1 Complete U-Joint Assembly with Short Yoke. Replaces OEM Number 58858A1. Three year fault free warranty (click HERE for details). Fits Mercruiser I, R, MR, Alpha I drives with 8-1/8" engine end yoke, 1972 to 1982...

MSRP:

Was:

Now: $287.99

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SEI

New SEI / Mercruiser 1972-Present Alpha 1 & Alpha 1 Gen II Complete U-Joint Assembly

New SEI Mercruiser 1972-1990 Alpha 1 Complete U-Joint Assembly. Replaces OEM Number 814819A2. Fits Mercruiser I, R, MR, Alpha I and Gen II drives with 9-9/16" engine end yoke. OE# 814819A 2. Three year fault free warranty (click HERE for details)...

MSRP:

Was:

Now: $287.99

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Short Input Yoke Shaft 8 1/8"

New SEI Mercruiser 1972-1990 Alpha 1 Short Input Yoke Shaft 8 1/8". Replaces OEM Number 39385A1. Fits Old Style inline 4 and inline 6 cylinder engines. Yoke measures 8-1/8 Inches. Three year fault free warranty (click HERE for details). SHIPPING:...

MSRP:

Was:

Now: $94.93

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SEI

New Sterndrive Engineering Mercruiser 1972-1990 Alpha 1 Heavy Duty U-Joint

New SEI Mercruiser 1972-1990 Alpha 1 Heavy Duty U-Joint. Replaces OEM Number 3850812. Three year fault free warranty (click HERE for details). Greaseable. 1970 to 1997. Also Fits OMC Cobra, Joint Venture 1986-1997 Volvo Penta, SX SHIPPING: Additional...

MSRP:

Was:

Now: $36.70

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 H-Yoke

New SEI Mercruiser 1972-1990 Alpha 1 H-Yoke. Replaces OEM Number 0912213. Serial number OK999999 and below. Three year fault free warranty (click HERE for details). SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or International...

MSRP:

Was:

Now: $43.72

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Short Yoke Shaft

New SEI Mercruiser 1972-1990 Alpha 1 Short Yoke Shaft. Replaces OEM Number 46020 1. Serial number OK999999 and below. Three year fault free warranty (click HERE for details). SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or...

MSRP:

Was:

Now: $64.80

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SEI

New SEI / Mercruiser 1972-1990 Alpha 1 Engine End Yoke Shaft 9 9/16"

New SEI Mercruiser 1972-1990 Alpha 1 Engine End Yoke Shaft. 9 9/16". Replaces OEM Number 0912212. Fits: All V6 and V8 engines and In-line engines newer than 1983. Three year fault free warranty (click HERE for details). SHIPPING: Additional shipping fees...

MSRP:

Was:

Now: $88.99

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SEI

New SEI / Mercruiser 1972-Present Alpha 1 & Alpha 1 Gen II 6 Jaw Propshaft

New SEI Mercruiser 1972-Present Alpha 1 Gen II 6 Jaw Standard Rotation Propshaft. Replaces OEM Numbers 44-850308 and 44-824110. Will also fit: Mercury Outboard 70-125 HP Inline 3 & 4 cylinder engines (6 jaw reverse only) 1997 and up and 3.0 liter...

MSRP:

Was:

Now: $289.31

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SEI

New SEI / Mercruiser Alpha 1 1972-1990 Driveshaft

New SEI Mercruiser Alpha 1 1972-1990 Driveshaft. Replaces OEM Number 45-55796. Will not work for GEN II drives. Three year fault free warranty (click HERE for details). SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or...

MSRP:

Was:

Now: $69.99

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SEI

New SEI / Mercruiser 1986 & Up Alpha 1 & Alpha 1 Gen II Stainless Steel Trim Pump Assembly

New SEI Mercruiser Sterndrive Stainless Steel Trim Pump. Will fit from 1986-Present Alpha 1 and Alpha 1 Gen II Sterndrives. Replaces OEM Number 865380A25. You can use the fittings from your old pump for quick connectors. Three year fault free warranty...

MSRP:

Was:

Now: $400.00

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SEI

New SEI / Mercruiser 1986 & Up Alpha 1 & Alpha 1 Gen II Trim Pump Assembly

New SEI Mercruiser Sterndrive Trim Pump. Will fit from 1986-Present Alpha 1 and Alpha 1 Gen II Sterndrives. Replaces OEM Number 865380A25. You can use the fittings from your old pump for quick connectors. Three year fault free warranty (click HERE for...

MSRP:

Was:

Now: $300.00

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