Jonah said:
Thanks everyone. Again, this is very helpful.
I am going to continue flushing with fresh water after each outing, and will use Salt Away every few outings. I will either ensure that my T-Stats are cleaned at 100 hours, or might give it a shot myself sometime.
Its the tstat chambers that you want to keep clean of buildup. A dirty tstat can be replaced.
Get some spare gaskets before you remove the t-stats. You may get away with reusing the old ones but if they have been on a long time, they probably won't come off intact. No sealant and don't overtightem the bolts. They are not that hard to snap. At one time I used a torque wrench for all bolts and that is a good idea but after a while you do get the feel for torques for a specific bolt sizes. ( that said, things like head bolts or manifold bolts always get a torque wrench)
You can reuse the old t-stats if they are working. A simple check is to put them in a pot of water and heat the water. Starting from a closed position, they will eventually start to open and will do so until fully opened. Do both at the same time so you can see if one is acting differently from the other. If you want you can put a kitchen thermometer in the water and note the operating range.
Make sure you note the direction of the tstat when reinstalling. On some motors, the stat can be installed backwards.
Since I am a bit anal, i do the hot water test on new stats also just to make sure they are not defective.