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Small Engines (Lawn Mowers, etc.)/18.5 B&S heavy oil smoking
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Question
I have a Briggs & Stratton 18.5 OHV 31P777-0348-E1 that since new has blown heavy smoke if turned hard while in use. If you go really slow you can get around this. It normally will not use oil unless you keep making it smoke. Engine runs fine. It has started to get worse to the point that if you drive over really rough ground it will trigger the same thing. People think I'm fogging for insects. But if I turn slowly and stay on smooth surface it seems fine. What do you think?
How new is new? IT sounds like you could have a valve seal out, a leaky head gasket, (your not overfilled on oil are you) a crankcase vacum leak-check the rubber oring around the dipstick and tube. If its still under the warranty period, get it back to the dealer ASAP.
Just for the fun of it, check the cylinder head bolts, are they tight?
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Answers by Expert:
David R -GlobalTek LLC
Expertise
Small Air Cooled Engines and applications including Twin Cylinders. A specialist in the Chinese Engine-- i e LIFAN, LONCIN, ZONGSHEN, RATO, LCT, YAMAKOYO, DUCAR, GREYHOUND, (Honda Engine COPY) area. Have personally been to Chinese Engine factories several times Former Day to Day job is in application engineering of 4 cycle Engines. Evaulation, testing and failure diagnosis of Chinese Engines,Briggs and Stratton and Kohler engines daily. In other words I do this everyday.
Experience
30 Years in OPE industry. Briggs and Stratton Master Service Tech, Master Parts Pro. Former owner of OPE dealership servicing and selling Honda, MTD, Murray, Husqvarna, Toro, Lawnboy, Shindaiwa, Briggs and Stratton, Kohler, and Tecumseh. Previous job as trainer for engine manufacturer performing service training for companies like SEARS, HOME DEPOT, LOWES, TSC, etc. Instructor for Technical College.
Education/Credentials
Vo Tech Training 1981, Husqvarna Factory Training, Briggs and Stratton Factory Service School(s) Tecumseh Factory Training, Shindaiwa Factory Training, MTD, Hydrogear, Toro, Lawnboy update schools. To many to list in the past 30 years.
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