got a dital 6 box 6520 goin bad 2 times in 6 monts any body know why thank for info.

the black going to the battery neg and the red going to a switched source Not the battery . if so its hot all the time that was my mistake 2 boxes later

I have the red hooked to the starter witch I turn off at the switch but I have gone threw 3 boxes in 2 years, is this not correct? MSD replace the boxes no question asked, I have been thinking of getting rid of it and going b ack to the Merc Thunderbolt

I have heard that the MSD box's are very sensitive to changes in voltage. If you hook up battery chargers to your boats batteries, that can allow surges to affect the electronics inside the box. Some people have mentioned adding a filter that MSD makes and put it inline on your power lead. Its called a Noise filter part # MSD-8830 approx $36. This was some info I got while trying to trouble shoot a 6M-2L. Hope this helps.

Dose anyone recoment the MSD Ignition systems then? I have one that I was thinking about putting on a motor I am building but I keep hearing badthings about them, HELP!

everything bad you hear is true. when clients would ask me the best place to put their msd , i woukd always reply, " in the dumpster"

Funny that this came up today. On one boat I have had a 6m for over 10 years with no problem. Just this weekend the 6m died on my other boat. I was having some eratic ignition problems and rebuilt the (MSD) distributer with all new parts, put it back in, still eratic then quit working all together. Swapped boxes, other box works perfect.

Cannot repair the 6m, so thinking about going to the 6ALN or Offroad.

as I've said many times before, in most cases MSD useless on a boat, will not make run any faster over aworking correcly good ignition system, and now they are outsourcing chinese componants, their reliability is horrible...if it was not great before...some boxes would last for years, some only days, so running one is like playing russian rulet..only matter of time....hard to beat a mallory unilite....