How does a boat transmission work? In this video from Boats.net, Garrett will use our lower unit cutaway to show you precisely how the gearbox works in your outboard. He’ll take you on a tour of the lower unit from the drive shaft, through the water pump, and into the gearbox where you’ll see how power is transferred from your motor to the water.

See the lower unit diagram for a Yamaha F225 here: https://www.boats.net/catalog/yamaha/...

Read more here: https://www.boats.net/blog/outboard/l...

VIDEO HIGHLIGHTS
Drive shaft - 0:30
Water pump - 1:00
Shift shaft - 2:40
Gearbox cutaway - 3:00
Lower unit seals - 7:30

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