I'd be careful using Greased Lightning.
GL is a caustic solution (think mild Lye) rather than an acid. When I first discovered the stuff I thought it was the cat's-meow for cleaning aluminium and stainless steel.
I was using it to clean Florida grit and road grime off our bicycles. Did a fabulous job. Then after a year or so, probably 20 cleanings, I had to replace the tires. The sidewalls were nice and clean but the GL was attacking the tire carcass, the sidewalls were stiff & cracking and the cording was coming through.
I don't know for certain that GL would effect the wire insulation or the fuel hoses on our Yanmar the same way but I'll stick to mild soap & water.
cvt