Z272 Shabah 502 mag - EXHAUST
 

I have committed to purchasing a beautiful Z272 Shabah that has a 502 mag mercruiser. The Captain's call or "Silent Choice" works fine until after a few hours of running it will just cut back to silent mode. If you hit the red reset button on the engine it will then allow it to open back up. This is not an aftermarket kit so i know it is not Corsa... Any ideas what could cause this? Thanks.