Need some info on the 19.5 hp briggs motor. The tractor was giving to me and is in pretty good condition. I don't know how old it is, so I would say maybe 5 yrs. old. The problem is the tractor turns over and I'm getting spark but no gas into the cylinders. This engine is turbo cooled which I haven't looked into yet. I can see gas pumping into the carb and tried starter fluid also. Could this be a timing or valve problem? I would appreciate any info in solving this problem......Thx bob106