what do you use when descaling your outboard motor?

i see some people just use dish soap poured into the hose before flushing to run through the engine and clean it out and some people swear it works wonders to neutralize the salt residue, but im having a hard time believing this is going to do anything much for removing scale as a yearly maint flush because i dont know how it can remove scale already built up inside the engine.

i see online where some people say they use vinegar (which is a mild acid) to descale engines then run dish soap through them after descaling to neutralize the acid and help clean out dirt in the passages. this is the method im thinking i will try.

then i see some people buy name brand products designed to descale engines. im told these are nothing more then vinegar with detergents added to them mixed in water then they put on a fancy label and name

i also see some people say they use muratic acid (a very harsh and highly corrosive acid) to descale engines then run dish soap through them to neutralize the acid and clean the passages. i also heard that muratic acid is way to harsh and will eat up the gaskets so im not going to try this stuff.