AboutDavid 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.
Question Briggs & Stratton Model 402707 Type 1205-01
1: It turns over good
2: new magneto and plugs(great spark at both plugs)
3:Compression is 75 psi on both cylinders
4:I can see gas coming into the intake.(I tried putting gas in the carburetor it won't run).
5: Spark plugs are dry.
6:I put gas directly into the cylinders it still will not run.
7: It will backfire occasionally.
What do you advise?
Answer Sounds like something is goofed up with the timing. Did the flywheel key shear part way some how? I have seen a few of these, but not many throughout the years...cam problem perhaps? Check your flywheel key and let me know. Good Luck...Don't give up we will figure it out!
One more thing, disconnect the ground wire from the wiring harness that attaches to the engine and try this too. Perhaps we have an interlock issue that is preventing it to start.
