Re: Mercruiser 496 MAG Diagnostic Port
You should find a black four pin connector on the port side of the throttle body. It may have a dust cap on it and it could have a depthsounder connected to it. Shouldn't be too hard to find. Once connected, click on the "Codes" tab at the top of the screen, then click on the "Faults" button to show the list of active faults. Next click on the "H" button to retrieve the contents of the Freezframe memory. If you need help understanding the data, post it and I (or someone else) wiil help.