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20 hp B& S motor stalls under load

alansbrack's Avatar

Join Date: May 2012
Posts: 1

05-04-12, 06:31 PM   #1  
20 hp B& S motor stalls under load

I have a JD L120 mower and engine runs fine at idle but when i engage blades it stalls like out of gas. starts emitting black smoke sometimes white also. have drained all gas put in fresh gas and stab-il, replaced both plugs even replaced coil but still same problem. HELP please

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cheese's Avatar
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Join Date: Jul 2001
Posts: 16,567

05-04-12, 07:30 PM   #2  
Check the oil. Is it thin, and/or does it smell like gas?

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marbobj's Avatar

Join Date: May 2006
Posts: 3,658

05-04-12, 07:33 PM   #3  
What do you get with half throttle then engage the blades - same thing? If so think in terms of a safety switch.

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