white smoke

Reply

  #1  
Old 10-22-12, 01:43 PM
Member
Thread Starter
Join Date: Oct 2012
Location: usa
Posts: 3
white smoke

Briggs & Stratton engine 31c707-0154e1 on my riding mower.

Recently it becomes difficult to start the mower. When it is started, lot of white smoke coming out of exhaust. After running for a while, no more smoke and the mower runs fine. After several day, when starting it again, same thing happens. Sometime it won't start, I opened the OHV cover and can start the engine, but see oil and gas spill out of OHV box. Please help.
 
Sponsored Links
  #2  
Old 10-22-12, 06:02 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,822
Your carburetor is leaking fuel into the crankcase. Clean the carb and replace the needle and gaskets between the body and float assembly if it has a nikki carb, then change the gassy oil before running it again.
 
  #3  
Old 10-22-12, 07:00 PM
Member
Thread Starter
Join Date: Oct 2012
Location: usa
Posts: 3
Thank you! cheese. White smoke comes out of exhaust. People also told me it is due to burning excessive oil. so I guess fuel leaking into the crankcase causes burning oil but don't now why. Could you help explain how it works Thanks again.
 
  #4  
Old 10-22-12, 07:29 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,822
Yes, gas is thin, it makes the oil so thin that it gets past the rings and into the combustion chamber. It also makes the oil level too high which allows it to blow through the crankcase breather into the intake manifold where it gets sucked into the combustion chamber and burned.
 
  #5  
Old 10-22-12, 08:48 PM
Member
Thread Starter
Join Date: Oct 2012
Location: usa
Posts: 3
ok. Thanks! I'll clean the carb and replace the needle and gaskets.


 
  #6  
Old 10-22-12, 08:51 PM
Member
Join Date: Oct 2011
Location: USA
Posts: 433
Change the oil also,,many will ruin their engine if they run them on thinned oil by cause of gas in it.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes