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carb puffing white smoke


smenguy's Avatar
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04-10-09, 06:39 AM   #1  
carb puffing white smoke

I have a briggs model 190702 with a large one-piece flo-jet carb. it is on a snapper tiller. I have rebuilt the carb and have the main jet and the idle mixture screw at 1 1/2 turns out. I have tried to adjust it but can't seem to get it right. it keeps puffing out white smoke every so often. what do i need to do? thanks

 
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mowermonkey's Avatar
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04-10-09, 06:28 PM   #2  
Sounds like your getting air into the system . Intake, gasket or a valve not seating properly

 
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04-10-09, 07:08 PM   #3  
Air leaks don't cause white smoke... (?)

White smoke (bluish grey) on a small engine is generally oil burning. Black smoke is fuel. Is the oil level overfull? Does the oil smell like gas?


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

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04-11-09, 04:45 AM   #4  
the oil looks fine and does not smell like gas. I have found that some one worked on the engine and I don't know what they may have done. It puffs the white smoke mostly when I throttle up. I tried adjusting the carb but no success.

 
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04-11-09, 09:12 PM   #5  
Sounds like an old unit, and your description of the smoke sounds like worn rings.


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04-14-09, 05:58 AM   #6  
Diagnostics fer-shere

As I was trying to explain internal leakage, I over looked the fact of white smoke being air and oil leaking past the rings and/or valves.Im thinking coolant as in leaking head gasket, which produces stumble and white smoke in automobile applications I apologize for My misrepresentation.

 
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04-15-09, 12:15 AM   #7  
No problem...apology not necessary. Just trying to keep the diagnostic process in a logical order.


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