I replaced the 50 in my YSR with a lifan 150 upright engine. It's a brand new engine. It won't start. I am getting spark, and the carb has fuel. It pops, but won't run. I have a feeling the timing is off, as I am getting a flame out of the exhaust. I have done the typical adjusting of the valves that everyone recomends, but it still won't run. Compression seems good, and I am getting tons of spark.
How do I adjust the timing on an upright 150 (like an xr150 engine).
