Originally Posted by mike-m
So my FX324 Colour Chartplotter is now reduced to junk...
Don't buy Magellan!!!!
Sorry to hear about your disappointment. Sadly this is a real risk with all marine electronics, even Garmin were not immune when they changed to their own brand of chart all the preceding models became obsolete. So it is not any single brand.
Your Raymarine autopliot will use Seatalk rather than the industry standard NMEA, but I see your Magellan was outputting NMEA so it should be a straight forward enough job to replace it with a 551. Worth checking the Raymarine manual to be sure, but it has certainly been done with other models.
You should be able to pick up a 551 for 350.00 quid plus vat and delivery.