20 hp B& S motor stalls under load


Old 05-04-12, 06:31 PM
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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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Old 05-04-12, 07:30 PM
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Check the oil. Is it thin, and/or does it smell like gas?
Old 05-04-12, 07:33 PM
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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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