I had some problems with the ignition on my 6,2 mercruiser, and it appeared that there was a faulty MSD 6M-2 Ignition Control that produces multiple sparks.

My engine has a procharger and intercooler and produces about 500hp.

Do I need to replace the MSD ignition controller or this the engine ok with standard ignition straight from the coil? If so, why is the MSD installed, what advantages does it give?

it provides no advantage or improvement what so ever over the stock electronic ignition, and while there are testamonials all over this board from people that say they have run them trouble free for years, i consider them to be singularly unreliable and the poster child for useless aftermarket garbage.

Thanks man, just the answer i was looking for. Back on water!