Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready when calling.
Measuring Guide:
Item is subject to a 20% restocking fee (Boat Covers, Bimini Tops, Outdrives, Drop Ship Items and Special Order Parts)!
**Year, Serial Number, and Horsepower are required to order. Please contact us with this information after you place your order otherwise processing will be delayed.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
SEI Yamaha 2 Stroke V4 Repl Lower Unit 2:1 20" Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready...
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SEI Mercury 2 Stroke 2.33:1 20" Replacement Lower unit Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number...
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SEI Yamaha 76° V6 4 Stroke 25" 2:1 Repl Lower Unit Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number...
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SEI Yamaha V6 2 Stroke 1.81:1 20" Shaft Repl Lower Unit Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number...
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SEI Mercruiser Outboard 4.3L Repl Upper Unit 1.81 Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready...
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Sterndrive Engineering Yamaha V6 Outboard 2.6L Replacement Lower Unit 1.86:1, 20" Replacement lower unit for most Yamaha 90 degree V6 2.6L 2-stroke engines with 20" drive shaft. SE416 1.86:1...
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Sterndrive Engineering Yamaha V6 Outboard 2.6L Replacement Lower Unit 1.86:1, 25" Accidents happen and lower units can wear out over extended use which means at some point, a replacement outboard...
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Sterndrive Engineering Yamaha V6 Outboard 2.6L Replacement Lower Unit 2:1, 20" Replacement lower unit for most Yamaha 90 degree V6 2.6L 2-stroke engines with 20" drive shaft. SE416 2:1 Gear...
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SEI Yamaha 90° V6 Repl Lower Unit 2:1 25" Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready...
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SEI Yamaha 90° V6 25" 1.86:1 Replacement Lower Unit - Counter Rotation Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your...
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