Fountain38

I have twin 500's and one of the engines's has been backfiring!! What is the cause? Is it in the Distributer or possibly low fuel pressure? I understand that Merc had a recall or TSB out on this problem. Is there a link to find out about any TSB from Merc. Can you plug the ECM's into a merc software computer and find out the problem like you can on a car? It mostly backfires upon acceleration.
Any suggestions would be appreciated. The engines are 2002 500EFI's

FOUNTAINATLAST

I'm not sure of any TSB's, but I'd probably start with the plug wires and distributer. A bad wire may be arcing causing the back fire or distributer cap cross firing undrneath. Good luck, keep us posted. Your findings may help out others.