I think the buildup is just carbon but whats the safe way to remove it?
On with the inspection:
Fuel filter : looks great, and I learned how to bleed the system when I put it all back together. BUT..
Buildup in the filter cover, I have scrubbed at it with a shop rag but it is stubborn... How do you get this gunk out safely?
Belts : are in good shape.
Next is the raw & fresh water cooling systems, but I am going for lunch first...