Fans watch the powerboats race across the water.

- Image ID: T88873
Fans watch the powerboats race across the water.
Richard Splash / Alamy Stock Photo
Image ID: T88873
Fans watch the powerboats race across the water. Honda Formula 4-Stroke (F4SA) is the world's largest two class off shore powerboat series. Round two of the 2009 Grand Prix season was completed in Plymouth the weekend of 20-21st June. The event celebrated its 10th anniversary and drew a large crowd to watch the 150hp & 225hp classes race across Plymouth Sound.