White smoke?

Sweden123

Seaman Apprentice
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Apr 1, 2023
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When i start my Mercury 50hp 4 stroke from 1997 it comes white smoke from the exhaust pipe.
Is that normal? First time i see that smoke.
Grateful for answers :)
/Sweden123
 
Last edited:

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,843
White smoke is usually steam. Blue smoke is oil, black smoke is fuel.

Does it clear up after a few moments?
 

Sweden123

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Apr 1, 2023
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34
White smoke is usually steam. Blue smoke is oil, black smoke is fuel.

Does it clear up after a few moments?
Thanks for your reply :)
I will check further tomorrow but if the smoke dont clear up is it something wrong then?
/Sweden123
 

QBhoy

Fleet Admiral
Joined
Mar 10, 2016
Messages
8,342
If it’s white, it’s either steam from the weather/climate…or you’ve got a compromised interface seal issue, allowing water to enter the combustion area. Told by looking at the spark plugs perhaps.
 

Sweden123

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Apr 1, 2023
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Thanks for your reply :)
I will check further tomorrow but if the smoke dont clear up is it something wrong then?
/Sweden123
I have check the engine today and the smoke clear upp after a while , i took a picture.
 

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dingbat

Supreme Mariner
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16,074
Pull a plug.
If it’s “clean” you have a water problem. Typically a head gasket
 

Sweden123

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Joined
Apr 1, 2023
Messages
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Pull a plug.
If it’s “clean” you have a water problem. Typically a head gasket
The smoke clear out after a few minutes when the engine is running. Today i have test drive the engine and all seems to work just fine. I changed engine oil recently and the dipstick shows me air bubbles on the dipstick which make me wonder why air pass in to the oil? The engine has 3 litres oil. As you see on the picture the oil level is not correct it was because the oil has to flow down in the oil pan.
 

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