Have 2003 3200 Sport Cruiser with...

[Randell]

Have 2003 3200 Sport Cruiser with dual 350’s. Have performance issues both engines. Only running at 2,500 rpm’s full throttle. Any suggestions what issue could be? Boat is professionally maintained. 

[wingless]

Welcome to the forum.

The most common problem is marine growth on the running gear and hull. Start w/ cleaning the bottom.

After that, then all the common performance issues on a fuel injected engine should be checked, starting with fuel pressure, measured on the fuel rail.

[Randell]

Thanks!