Replacement Yamaha Lower Units

We offer replacement Yamaha lower units for 75–300 HP applications, available in 20-, 25-, and 30-inch shafts with all gear ratios to match your existing unit. Every unit is backed by a 3-year fault-free warranty.

Yamaha Outboard Lower Unit | 1.86 | 25" | 25" Driveshaft F200/F175 4 Cyl | 90 - 416 - A25F - MarinePartsCo - 90 - 416 - A25F
Yamaha Replacement Lower Unit | 1.86 | 25" | 25" Driveshaft F200/F175 4 Cyl | 90-416-A25F
SEI Marine MPN : 90-416-A25F
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 1.86 | 25" | 2 Stroke | 90 - 416 - A25 - MarinePartsCo - 90 - 416 - A25
Yamaha Replacement Lower Unit | 1.86 | 25" | 2 Stroke | 90-416-A25
SEI Marine MPN : 90-416-A25
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 1.86 | 20" | 20" Driveshaft F200/F175 4 Cyl. | 90 - 416 - A20F - MarinePartsCo - 90 - 416 - A20F
Yamaha Replacement Lower Unit | 1.86 | 20" | 20" Driveshaft F200/F175 4 Cyl. | 90-416-A20F
SEI Marine MPN : 90-416-A20F
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 1.86 | 20" | 2 Stroke | 90 - 416 - A20 - MarinePartsCo - 90 - 416 - A20
Yamaha Replacement Lower Unit | 1.86 | 20" | 2 Stroke | 90-416-A20
SEI Marine MPN : 90-416-A20
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 2.15 | 25" | 4 Stroke | 90 - 405 - B25F - MarinePartsCo - 90 - 405 - B25F
Yamaha Replacement Lower Unit | 2.15 | 25" | 4 Stroke | 90-405-B25F
SEI Marine MPN : 90-405-B25F
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 2.15 | 25" | 4 Stroke | 90 - 405 - B25F - MarinePartsCo - 90 - 405 - B25F
Yamaha Replacement Lower Unit | 2.15 | 20" | 4 Stroke | 90-405-B20F
SEI Marine MPN : 90-405-B20F
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 2.15 | 25" | 4 Stroke | 90 - 405 - B25F - MarinePartsCo - 90 - 405 - B25F
Yamaha Replacement Lower Unit | 2 | 25" | 2 Stroke | 90-405-A25
SEI Marine MPN : 90-405-A25
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 2 | 20" | 2 Stroke | 90 - 405 - A20 - MarinePartsCo - 90 - 405 - A20
Yamaha Replacement Lower Unit | 2 | 20" | 2 Stroke | 90-405-A20
SEI Marine MPN : 90-405-A20
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 2.3 | 25" | 4 - Stroke | 90 - 404 - B25F - MarinePartsCo - 90 - 404 - B25F
Yamaha Replacement | 2.3 | 25" | 4-Stroke | 90-404-B25F
SEI Marine MPN : 90-404-B25F
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 2.3 | 25" | 4 - Stroke | 90 - 404 - B25F - MarinePartsCo - 90 - 404 - B25F
Yamaha Replacement Lower Unit | 2.3 | 20" | 4-Stroke | 90-404-B20F
SEI Marine MPN : 90-404-B20F
$1,195.00 USD -100%
$1,195.00 USD
Yamaha Outboard Lower Unit | 2.3 | 25" | 4 - Stroke | 90 - 404 - B25F - MarinePartsCo - 90 - 404 - B25F
Replacement Yamaha Lower Unit | 2.0 | 20" | 2 Stroke | 90-404-A20
SEI Marine MPN : 90-404-A20
$1,195.00 USD -100%
$1,195.00 USD

Why MarinePartsCo?

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Premium Quality

Built to OEM specifications, we only sell the highest quality replacement parts

Expert Support

Fitment first guidance, we want to make sure the part is correct before it ships

Fast Shipping

Quick delivery to get you back on the water as soon as possible.