Cleaning

Fired her up after nearly a year she cranked almost immediately have a lot of little things to check yet.One thing the engine is really dirty setting so long.I have tried degrease rs in the past and they leave a residue on the aluminum that is impossible to remove.I do not own a pressure washer so does anyone know of a product that will do the job without oxidizing the finish?

very hot soapy water with a paint brush to brush the hot soapy water on with then hose it off

forgot one thing if you have a air compressor blow the water off so it don't spot the aluminum up or if you have a leaf blower they work good also