Honestly on the engine I use degreaser in a pressure pack can and flush most of the gunk away solely with the pressure that comes out of the can.
Then I use my hose with a nozzle on the very finest fan setting and lightly flush the degreaser off and then blow it off with compressed air. That's fine on a Briggs and Stratton horizontal shaft engine.
Don't aim direct water into the flywheel area of the engine as that's where the ignition components sit right behind
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.