2.5 Litre Stock hydroplanes (“S” class) race to 100-plus mph, using 145 horsepower marine-based 2000 and 2300 Ford engines. S-boats offer very exciting side-by-side racing at a reasonable cost. Driving skill is paramount here, and driver development is inevitable, making this class an excellent stepping stone to bigger, higher-powered classes.

  • Minimum Age: 16 years old
    Minimum Length: 13′ 6″
    Engine: 2000 and 2300 Ford Inline 4 Cylinder
    Speed: 100+ MPH
    Minimum Weight: 1025 lbs. including driver
    Fuel: Gasoline per APBA specs
    Cylinder Heads: 4 Cylinder
    Est. Horsepower: 145

  • Competition Record: 90.639 MPH
    Straightaway Record: 110.535 MPH
    Previous Season National Champion:
    The Trainer S-36 R Austin Eacret

2.5 Stock Hydro Videos