Why do these boxes always go out when the OEM's can make stuff that will last for many many years? I used to work in a high performance shop and we replace MSD boxes all the time. Is the Crane or Accell box any better. I have just the regular 6A with a boost retard on mine and the system is about 8 years old. These boxes don't seem to have a definitive life span.

Jeffaker as TomR mentioned D.U.I. makes a great product and I currently have a special in the advertisers marketplace if you are interested.

If you prefer to replace your existing box, I do offer some competitve pricing on all MSD products.

Sorry about the semi-spam...just trying to give you some options.

Thanks,
Don B.

A spare box is a good idea.

Re Marine MSD BOX

I had a series of waves put enough water in the bilge that the belts were throwing it all over the engine. Never missed a beat.
The key thing in a boat is a good water resistant marine ignition.

Multi Spark Discharge-MSD,Under 3000 rpm's the ignition multi sparks every time it fires a cylinder. When i first converted my 502 to a procharger alot of factors came into play at idle: compression was lowered from 8.75 to 8.1,went from running 87 octane to 94 octane,lowered base timing 4 degrees,raised fuel pressure,ran colder plugs etc. The msd cleaned up the lazy,rich idle by helping to burn the fuel more completely,it also( by having a stronger all around spark) allows you to run a bigger plug gap resluting in better combustion with the bigger fatter spark. So its not just a high rpm race ignition,Smitty

Got a replacement ignition box installed and the motor fired right up. I am purchasing an additional box and keeping it as a replacement. Thank you for your responses.

You might save $200 getting your old one fixed and use it as a spare.

Last year I had a collection of 5 boxes and sent them back to MSD and they returned 5 new boxes free of charge. They said to run a in-line noise suppressor(part# 8830), which is a capacitor that controls voltage spikes. I now run these on every one I install and have had 0 problems since. I would call MSD for repair and maybe install this capacitor.

CP MSD Ignition Box Description CP Performance has a ton of MSD ignition boxes and other MSD product in stock.

Artic,
Yours certainly doesn't sound stock
In a stock engine configuration the advantages or lack there of , are not worth the reliability factor , or lack there of , particularly in a single engine boat , in IMHO

Did you charge the batteries with them hooked up. I've toasted a couple MSD boxes with the battery charger.