Have twin 2007 496 mag ho s could not get the iac valve to work finaly switched ecm (pcm0701) with other motor problem resolved in original motor and then moved to 2nd motor any one know if i can get my ecm reprogramed ? Thanks

The three choices that i'm aware of that offer repair work/reprogramming for Mercruisers 555 & pcm0701 are,

1) Dustin @ Whipple Industries supercharger,
2) Simon motorsports, http://www.simonmotorsports.com/ecu/optiecu.htm
3) Mercruiser factory by way of having a helpful Mercruiser dealer send it in for you as long as they trust your diagnostics without doing it themselves.

Good luck.

Pretty common. A faulty IAC damaged the PCM. Whipple can repair it.

Bob Lloyd
Full Throttle Marine

thanks that was the problem had something burnt out in ecm