Black Smoke; Blue Smoke; White Smoke; Overheating - Camano 31 Owner's Handbook Manual

Black Smoke

?
Dirty fuel
?
Poor fuel quality
?
Plugged air filter
?
Engine overload (i.e., rope in prop)
Black smoke occurs from the incomplete combustion of fuel. If your engine is emitting a little black
smoke while you are underway, then it is probably time for a good servicing. If black smoke persists
when the engine is no longer under load, consider yourself under notice to have it checked
immediately.

Blue Smoke

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Worn or stuck piston rings
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Worn valve guides
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High crankcase oil level
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Elevated oil pressure
?
Turbo charger problems
Blue smoke occurs when the engine's lubricating oil is burned. This means that somehow and
somewhere oil is entering the combustion chamber in a manner not intended. You may need help on
this one.

White Smoke

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Defective fuel injector
?
Cracked cylinder head
?
Leaking head gasket
White smoke usually occurs in conjunction with a poorly running engine. Mostly it will be caused by
water in the combustion chamber as a result of a leaking gasket, cracked cylinder head or the like. It
can also be caused by unburned, atomized fuel in the exhaust when a cylinder fails to fire. Remember,
however, that condensation in the exhaust is normal, particularly in cool weather. The idea here, of
course, is to make a mental note of what is normal and keep an eye out for the unusual. If the engine is
purring and the readings are all normal, you have nothing to worry about.

Overheating

If your engine overheating alarm sounds, immediately check your temperature gauge. If the reading is
normal then in all probability you have an alarm sending unit problem. In this case, you can continue
on your way and replace the unit at the first opportunity. You can deactivate the alarm by removing the
electrical connection attached to the sending unit. If, on the other hand, your temperature gauge is
above normal then you have an overheating problem. Immediately shut down the engine. Then, the
first thing to do includes checking out some of the more likely causes, such as the closed seacock or
insufficient coolant. If nothing is immediately obvious, check to make sure that the raw water system
isn't plugged by checking for water being discharged through the exhaust at the transom. If you find
water in the engine bilge you are likely to have a leak in either the fresh or raw water cooling system.
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