Merc 470 stalking at idle, won’t restart

[jamesbalog]

Hello I have a merc 470 that will stall after it idles or at no wake speed for 10 mins or so. When this happens the motor will not re start. If you wait 10-15 minutes it will fire right back up.

motor runs fine at higher Rpms

I’m new to I/Os any suggestions on where to start looking?