Here's some product info.....

Can the "experts" let us know what this all means and if it has any reactive properties with Aluminum or Steel???

http://www.sharecorp.com/msds/0710SaltAway.pdf
http://en.wikipedia.org/wiki/Sulfamic_acid
Sulfamic acid is used as an acidic cleaning agent, typically for metals and ceramics. It is a replacement for hydrochloric acid for the removal of rust. In households, it is often found as a descaling agent in detergents used for removal of limescale. From all acid, Sulfamic acid has the best water descaling property, thus also its application in cleaning dairy farm equipment and beer brewery. Although it is considered less corrosive than hydrochlorid acid, in its application as acid cleaning, it is very common to find user adding corrosion inhibitor.

Ttt

[I'd say this is a pretty critical on point question. If your theory is true the other motor would show same pattern/signs of wear you're seeing on 'bad' motor. I'd be checking that one before coming to conclusion it is the product.

I never have used SaltAway ... I certainly do use and abuse Dawn every time in & out. Haven't tried Dawn on my shafts yet, Strip, maybe this weekend. My motor guy says dish detergent first 3-2mins then fresh for 3-4mins ea till drinkable out the dumps.

I don't know, I'm still sticking with just H2O and 15 minutes per motor. Plus I flush on the lift, and don't really want to put all those chemicals in the creek water. (Note, I'm not a tree hugger by any means!)
Dean

Unless both motors have the same issue causing the abnormally fast corrosion. It's got to be something electrical to eat up the metal that fast. Something is either grounded, or not grounded, or not hooked up, or hooked up wrong.

Another idea...I know when I use the Salt Away dispenser, the product gets used up within minutes when flushing the motors. I used one cup per motor, then one more fill for the rest of the boat and trailer. I've also forgotten to turn the selector to "ON"...fried one impellor that way.

What about electrolysis?
The back part of the head where the intake blocks it off is near perfect, yet the rest of the head where water is moving shows lots of corrosion???

I have used Salt Away on my HP525 since September 2003 with no issues but a clean corrosion free boat & motor.
I have over 200 hours with zero issues.
It makes clean up a breeze & I love the stuff...

Sulfamic acid will drop the pH in the water solution and cause corrosion on almost all metals to increase. I am surprised that the instructions say to leave it in the motor i.e. not flush out the cleaning solution. No offense but could we verify that comment, maybe post a scanned copy of the instructions?? I personally would not leave anything except fresh water or winterizing solutions (antifreeze) in a motor.

Also, the MSDS indicates that the product is a blend of organic acids. The only constituents that are required to be named are hazardous ingredients hence the sulfamic is listed, so the rest of the blend is not known.

Looks like you got corrosive material between the head gasket and the head that sat stagnant and corroded the heads. Once the corrosive material gets in between the head gasket and the head it is difficult to flush completely. Look at the seating surfaces on the head gasket. Compared to where the metal is on the heads. The corrosion is magnified many times over when the motor is operated i.e. heated up, the corrosion rate doubles for every 10 degree increase in temp.

BTW I had similar damage to aluminum heads from running in salt water and I do not use Salt Away routinely.

I have been useing Salt-A-Way since 1998 in various boats. I have never had an issue. However I keep reading about Salt-A-Way actually being bad for the internals of the engine.

Anyone really know the truth about this?