Re: White Smoke out the exhaust Pull the spark plugs and see if there is any water in the cylinders. F115B four stroke: excessive white smoke. If you the white smoke consistently comes out and the sweet odor smell is present, then it is definitely a problem with your coolant leaking.
In an outboard , though, it may mean something other than a tow to shore and an expensive repair. Marine diesel white smoke from exhaust. Lets face it, any time we see smoke coming out of our engine we start to see dollar signs flash before our eyes however there are a number of things that could cause your engine to smoke. The white smoke is the result of normal condensation which builds up inside the exhaust system.
White smoke can be a big problem or not, depending on the thickness. White vapor from the exhaust can be as simple as a clogged exhaust manifol water fitting or exhaust elbow especially if the engine is performing properly. This may occur, for instance, because of restrictions in the injected elbow. Technically, the white color is caused by the light-scattering characteristics of the re-condensed droplets of fuel (un-burned or partially burned) larger than one micron.

As note white smoke is generally water or coolant being heated or combusted. Since you are closed system coole your reservoir level would be diminishing if this was from coolant.


