Volvo-Penta 7.4EFI 330hp idles fast?...
 

A friend of mine has a 1996 22 Scarab with the Volvo 7.4G?X-EFI 330hp duo-prop and after sitting over the winter it's had this fast idle problem. He recently replaced the IAC? adjacent to the air intake with no success. What else could it be? One of two electric fuel pumps? Clogged injectors causing motor to run rich? Where would the next logical step be?....