Have been trying to think how to decarb some engines - a few briggs I have here definitely need it.

Easy enough to rip the head off, but have been looking at other ways

I know of the water, or ATF trick, but has anyone know of any success of them?

What about things like https://www.penriteoil.com.au/products/p26-petrol-foaming-intake-cleaner or https://www.supercheapauto.com.au/p...engine-cleaner-uec150---150g/563810.html
which get sprayed into the engine

or what about the fuel additives (which I am always cynical of)
https://www.nulon.com.au/products/pro-strength-additives/petrol-fuel-system-extreme-clean. Its the only one that has PEA in it - which is what techron used to have - caltex don't sell it any more though

Regards
Tyler