I've recently gone through a total loss install with great results. I also ride 98% in salt water, and I abuse my ski quite heavily, and for over 15 hours of riding, I haven't had a single issue. A few pointers, whcih I may put into some kind of TL install document for the site...
- Mount the system on epoxy board or perspex (good thick stuff)
- Use Deutsch connectors on every group of wires exiting the brain
- Use silicon/dielectric grease on EVERY connector
- Use plenty of earth's, and if in doubt, use thicker gauge wire (esp. on coil earths)
- Have all your earths running to a central location (I use the midshaft housing by having a thick earth running from engine)
- Mount your coils as far away from brain as you possibly can
- The MSD grommet works fine. Use plenty of di-e grease, and when you punch the 2 new holes, make them tiny so the wires are a very tight fit
- Try to keep all your MSD standard wiring. Don't put joins in them. The less joins you have, the less chance of problems. On a Superjet, ALL the wires are long enough (pickup wires will go straight into one end of a Deutsch connector!) to reach to the rear firewall.
- Always verify IDENTICAL timing on each cylinder before running. If they aren't the same, something is wrong, or your pickups are out of alignment.
- Use a blanking grommet in the pickup plate where the wires run through. Punch a tiny hole in it, and then feed the 4 wires through. Then, put some sticky backs on the plate and zip tie the wires down to the plate. No chance of damaged wires/vibration here.
There's more, but that will do for now! This works really well for me, and again, I'm hard on my boats, and ride 98% in salt.
P.S...I have a cad drawing of my TL mounting plate that is very neat and makes things easy to access/remove and troubleshoot should the need arise!