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A powerful system for a small boat

Our team upgrades a Yamaha 21-footer

  • Jon Paulette from Crutchfield

    Posted on 8/11/2017

    Ryan and Brad, That boat has a dual battery setup and you can select either battery or both at the same time (it came from the factory like that). The boat owner typically uses one battery and keeps the other one on reserve. There is a stator/generator on the engine(s) that charges the batteries when the boat is running.

  • Ryan

    Posted on 8/11/2017

    I'd actually like to hear the answer to the alternator question too. Is there some info you could post here?

  • Brad Carver

    Posted on 7/6/2017

    I would assume this boat runs on the small jet ski style powerplants that don't use traditional alternators... if so, how did you supply the power with this install? I am looking at doing something similar my boat.


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