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 Smoking carb

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lawn chief life
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PostSubject: Smoking carb   Tue Dec 09, 2014 12:07 pm

So I recently got my speed mower running. The new muffler Is close the carb and after shutting it off I noticed there was smoke coming out of the carb after shutting it off. Do t know what's going on here or if I should be worked.



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Doc Sprocket
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PostSubject: Re: Smoking carb   Tue Dec 09, 2014 12:30 pm

Was it smoke, or was it vapour? Sometimes one can be confused for the other.

That said, I think you may want to consider either relocating the exhaust, or constructing some sort of heat shield. In addition to some potential for fire, there's the potential for vapour lock, and even a reduction in power due to the heat.

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willis923
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PostSubject: Re: Smoking carb   Tue Dec 09, 2014 12:30 pm

both of my old, worn out engines do that. We have a kohler command V twin that does it, and the tecumseh on my bolens does it. i wouldnt worry about it
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1997 Murray
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PostSubject: Re: Smoking carb   Tue Dec 09, 2014 1:03 pm

I am not so sure. my monky wards did that, and it was fuel leaking into the engine. it caught on fire and burned my hand.
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willysjeepmb
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PostSubject: Re: Smoking carb   Thu Dec 11, 2014 12:11 am

@Doc Sprocket wrote:
Was it smoke, or was it vapour? Sometimes one can be confused for the other.

That said, I think you may want to consider either relocating the exhaust, or constructing some sort of heat shield. In addition to some potential for fire, there's the potential for vapour lock, and even a reduction in power due to the heat.
I have heard of vapor lock. What exactly is a symptom of it or what does it do?
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Doc Sprocket
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PostSubject: Re: Smoking carb   Thu Dec 11, 2014 7:49 am

Basically, vapor lock is the result of fuel boiling (changing from a liquid to a gasous state) within the fuel system, be it lines, pump, or carb. Symptom? Fuel starvation, despite everything working properly.

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