It could just be condensation which forms in the exhaust system outside of the engine, or you could be leaking coolant into your engine (typically via the head or intake manifold gasket).
can exhaust manifold leak cause you to burn oil
No, that's kind of an old wive's tale anyway! The valve material is too good now.
Yes, a prolonged exhaust leak will eventually cause problems with your cylinder head. The leaking exhaust is very hot and you can cause small cracks in the head if you don't repair the problem promptly. If you can hear the exhaust leaking, it may already be too late! Get it checked out soon!
A blocked water box will prevent water from flowing into the exhaust system. Because jet skis have a fully-enclosed engine space, cooling of the exhaust system is vital to prevent overheating. With no cooling water flowing into the exhaust system, the exhaust system will overheat. Exactly what happens depends on the model and to some extent on luck. But usually one of the exhaust connections will burn through, causing exhaust to leak into the bilge.
That is a necessary evil thanks to the EPA. A diesel truck won't pass emissions without one. Chevy and Ford have them too, they catch the black soot that diesel engines are famous for and store it. When the filter gets full the truck injects raw fuel into the filter to re-burn the soot, Unfortunately dodges think they are full all the time and have a steady stream of diesel pouring into the exhaust helping you burn that $4.00 a gal fuel. But it could be a Ford and shoot a 10 foot flame out the exhaust burning up the RV or load of hay your pulling.
when it touches electrical objects such as computer toaster blender etc. then it starts to burn.
yes because the engine cannot burn water.
It can be as simple as an exhaust leak allowing oxygen in to cause unburned fuel to burn with a pop or bang
excessive exhaust back pressure, possibly a failed catalytic converter
Oxides of nitrogen (NOx), a combustion by-product, combine with water to form acid. The acid irritates your eyes.
yes
No