I know this is a little controversial, but is the MSD marine ignition set up worth the hassle. I have heard alot about keeping a spare msd box (since they like to go out). What about the ignition coil. Is it worth staying with the stock merc coil? I can understand a little improvement on paper, but will I see anything on the water. Is it worth putting on or not?

I thought an MSD coil would be better on my 525SC. No difference and the MSD only lasted 2 seasons. I put a 10+ year old merc coil back on and it was fine.

I would just look for a V8-HP ignititon module for what you have.

Disregard the V8-HP module suggestion since you have a TB V and MPI engine. I would just leave it alone or work with somebody on recalibrating the ECM and adjusting the timing curve.

I haven't ordered one recently, but I understand that S&S (bought crane cams' assets) has the ignition / electronics products (including hi-6m ignition) and motorcycle valve train products back on line.

I like them a lot better than an msd set-up if you're going that kind of route. The last suggestion is probably the best...

That I am not sure about Crane, I am about to give up on them. I am also thinking about scratching the the whole MPI set up and go carbed. I think I can add more hp going old school.

i was facing similar to the same thing recently and just ended up going with the stock set up in my 496's. i have read way to many threads on failures with all the other types of ignitions on the market. i've ran stock TB's with up to 675 hp with no problems. on the other hand i never really did comparisons with other ignitions to know if one was better than the other however the stock ignition has always been very reliable.

http://69.20.53.62/

s&s is a decent outfit. I've bought bike parts from them for years and am fixin to order a new ignition...